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Autor: Grafiati
Publicado: 25 de maio de 2024

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1

Uheda, Kyota. "Application of Nitride and Oxynitride Compounds to Various Phosphors for White LED". Key Engineering Materials 403 (dezembro de 2008): 15–18. http://dx.doi.org/10.4028/www.scientific.net/kem.403.15.

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Multiternary nitride and oxynitride compounds doped with rare earth ions, such as Eu2+ and Ce3+ have been enthusiastically applied as various phosphors to white LED. New red and green phosphors, CaAlSiN3:Eu and Ba3Si6O12N2:Eu, have been successfully synthesized, recently. The red phosphor has intense emission around 650 nm under two different irradiations at 405 and 455 nm from blue- and near UV-LED chips, respectively; while strong emission is observed around 520 nm from the green phosphor. Both phosphors also show small thermal quenching over the temperatures up to 150 °C. In addition, both LaSi3N5:Ce and La3Si8O4N11:Ce in lanthanum silicon nitride and oxynitride were examined as candidates for a blue phosphor in white LED with near UV-LED chip.
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2

Cherepy, Nerine J., Stephen A. Payne, Nicholas M. Harvey, Daniel Åberg, Zachary M. Seeley, Kiel S. Holliday, Ich C. Tran et al. "Red-emitting manganese-doped aluminum nitride phosphor". Optical Materials 54 (abril de 2016): 14–21. http://dx.doi.org/10.1016/j.optmat.2016.02.008.

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3

Dutta, Dimple P., e A. K. Tyagi. "Inorganic Phosphor Materials for Solid State White Light Generation". Solid State Phenomena 155 (maio de 2009): 113–43. http://dx.doi.org/10.4028/www.scientific.net/ssp.155.113.

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Solid-state lighting (SSL) is emerging as a highly competent field and a possible alternative to existing lighting technologies. Development of a suitable phosphor is an important aspect of SSL. The aim of this review is to summarize status of Inorganic Phosphors towards SSL applications. Various examples have been taken from oxide, fluoride, nitride, sulfide and phosphate based host lattices. The important concepts like CIE coordinates and Color Correlated Temperature (CCT) will also be discussed. The sections encompasses of red, blue and green light emitting phosphors. The white light emitting phosphors will also be discussed in details.
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4

Zhang, Shiyou, Zhen Song, Shuxin Wang, Zhizhen Wang, Feixiong Wang e Quanlin Liu. "Red persistent and photostimulable phosphor SrLiAl3N4:Eu2+". Journal of Materials Chemistry C 8, n.º 14 (2020): 4956–64. http://dx.doi.org/10.1039/d0tc00277a.

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The red persistent luminescence and the photostimulable luminescence in the nitride SrLiAl3N4:Eu2+ are reported, and the mechanism are discussed on the basis of the HRBE diagram.
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5

TENG, Xiaoming, Weidong ZHUANG, Yunsheng HU e Xiaowei HUANG. "Luminescence properties of nitride red phosphor for LED". Journal of Rare Earths 26, n.º 5 (outubro de 2008): 652–55. http://dx.doi.org/10.1016/s1002-0721(08)60155-6.

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6

Kim, S. W., T. Hasegawa, S. Hasegawa, R. Yamanashi, H. Nakagawa, K. Toda, T. Ishigaki, K. Uematsu e M. Sato. "Improved synthesis of SrLiAl3N4:Eu2+ phosphor using complex nitride raw material". RSC Advances 6, n.º 66 (2016): 61906–8. http://dx.doi.org/10.1039/c6ra14107b.

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Narrow band deep-red emission SrLiAl3N4:Eu2+ phosphor was effectively synthesized using complex nitride Sr3Al2N4 and Li3AlN2 as raw materials. The phosphor exhibited strong deep-red emission peaking at 654 nm under excitation at 450 nm.
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7

Xia, Yonghui, Shuxing Li, Yingxue Zhang, Takashi Takeda, Naoto Hirosaki e Rong-Jun Xie. "Discovery of a Ce3+-activated red nitride phosphor for high-brightness solid-state lighting". Journal of Materials Chemistry C 8, n.º 41 (2020): 14402–8. http://dx.doi.org/10.1039/d0tc03964k.

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8

Nuryadin, Bebeh Wahid, Ea Cahya Septia, Ferry Iskandar, Takashi Ogi, Kikuo Okuyama, Abdullah Mikrajuddin e Khairurrijal. "Microwave-Assisted Solid State Synthesis of Red-Emitting BCNO Phosphor and its Characteristics". Advanced Materials Research 896 (fevereiro de 2014): 464–67. http://dx.doi.org/10.4028/www.scientific.net/amr.896.464.

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Red-emitting BCNO phosphor has been synthesized by a microwave-assisted solid state reaction using a low-cost boric acid, urea and polyethylene glycol (PEG-20k) as the starting materials. The effects of reaction parameters: temperature, carbon and nitrogen content on material composition and photoluminescence properties were investigated. Nearly multi-phase hexagonal boron nitride, boron oxide, boron carbide and carbon graphite was observed, indicating the BCNO were successfully synthesized. The photoluminescence spectra of the phosphor excited by a UV light (365 nm) showed a broad emission band at 460 - 620 nm.
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9

Ueda, Jumpei, Julius L. Leaño, Cyrille Richard, Kazuki Asami, Setsuhisa Tanabe e Ru-Shi Liu. "Broadband near-infrared persistent luminescence of Ba[Mg2Al2N4] with Eu2+ and Tm3+ after red light charging". Journal of Materials Chemistry C 7, n.º 6 (2019): 1705–12. http://dx.doi.org/10.1039/c8tc06090h.

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A near infrared (NIR) persistent luminescent Ba[Mg2Al2N4]:Eu2+–Tm3+ phosphor chargeable by red light was prepared via a solid state reaction from all-nitride starting materials.
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10

Trinh, Hung Quang, Jin Oh Jo, Sang Baek Lee e Young Sun Mok. "Preparation of red nitride phosphor from powder mixture of metal nitrides using spark plasma sintering". Current Applied Physics 14, n.º 8 (agosto de 2014): 1051–56. http://dx.doi.org/10.1016/j.cap.2014.05.019.

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11

Black, Ashley P., Kristin A. Denault, Judith Oró-Solé, Alejandro R. Goñi e Amparo Fuertes. "Red luminescence and ferromagnetism in europium oxynitridosilicates with a β-K2SO4 structure". Chemical Communications 51, n.º 11 (2015): 2166–69. http://dx.doi.org/10.1039/c4cc08548e.

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LaSrSiO3N and LaBaSiO3N are the first examples of nitride-based alkaline earth orthosilicates with β-K2SO4 structure, and they show red-orange luminescence after activation with Eu2+. The analogous compound LaEuSiO3N is, in addition to a red phosphor material, a soft ferromagnet with a Curie temperature of 3 K.
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12

Teng, Xiaoming, Chao Liang e Jinhua He. "Effect of strontium nitride on the properties of Sr2Si5N8:Eu2+red phosphor". Journal of Semiconductors 32, n.º 1 (janeiro de 2011): 012003. http://dx.doi.org/10.1088/1674-4926/32/1/012003.

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13

WATANABE, Tomoaki, Kazumichi NONAKA, JinWang LI, Kazuhisa KISHIDA e Masahiro YOSHIMURA. "Low temperature ammonothermal synthesis of europium-doped SrAlSiN3 for a nitride red phosphor". Journal of the Ceramic Society of Japan 120, n.º 1407 (2012): 500–502. http://dx.doi.org/10.2109/jcersj2.120.500.

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14

Chung, Shyan Lung, e Shu Chi Huang. "Synthesis and Luminescence Properties of a Red Nitride Phosphor (CaAlSiN3:Eu2+) for White Light LED Applications". Advances in Science and Technology 88 (outubro de 2014): 104–10. http://dx.doi.org/10.4028/www.scientific.net/ast.88.104.

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A combustion synthesis method has been developed for synthesis of Eu2+-doped CaAlSiN3phosphor and its photoluminescence properties were investigated. Ca, Al, Si, and Eu2O3powders were used as the Ca, Al, Si and Eu sources. NaN3was added as both solid-state nitrogen source and reducing agent and NH4Cl was added as catalytic agent. These powders were mixed and pressed into a compact which was then wrapped up with an igniting agent (Mg+Fe3O4). The wrapped reactant compact was ignited by electrical heating under a N2pressure of 0.2-1.0 MPa. Effects of experimental parameters on product yield and photoluminescence properties were investigated. The synthesized CaAlSiN3:Eu2+phosphor absorbs light in the region of 200-600 nm and shows a broad band emission in the region of 500-800 nm due to the 4f65d1→4f7transition of Eu2+. The peak emission intensity is ~106 % of a commercially available phosphor, YAG:Ce3+(P46-Y3), and the peak emission wavelength ranges from 610 to 680 nm depending on the Eu2+concentration upon excitation at 460nm. The synthesized phosphor also shows excellent thermal and chemical stability and thus has a potential application as a red phosphor for white LED lighting.
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15

Syväjärvi, Mikael, Rositza Yakimova, Motoaki Iwaya, Tetsuya Takeuchi, Isamu Akasaki e Satoshi Kamiyama. "Growth and Light Properties of Fluorescent SiC for White LEDs". Materials Science Forum 717-720 (maio de 2012): 87–92. http://dx.doi.org/10.4028/www.scientific.net/msf.717-720.87.

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The LED technology started to developed many years ago with red light emitting diodes. To achieve the blue LED, novel growth technologies and process steps were explored, and made it possible to demonstrate efficient blue LED performance from nitrides. The efficiency was further developed and blue LEDs were commercially introduced in the 1990’s. The white LED became possible by the use of the blue LED and a phosphor that converts a part of the blue light to other colors in the visible range to combine into white light. However, even today there are limitations in the phosphor-based white LED technology, in particular for general lighting, and new solutions should be explored to speed the pace when white LEDs will be able to make substantial energy savings. In this paper we overview gallium nitride materials evolution and growth concepts for LEDs. We describe the fluorescent silicon carbide material prepared by a novel growth technology for a new type of white LED in general lighting with pure white light. This paper introduces an interesting research in fundamental growth and optical properties of light emitting silicon carbide.
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16

Luscombe, Christine Keiko. "(Invited) Organic Dyes Derived from Molecules in Cacao Beans for Use in Lighting Applications". ECS Meeting Abstracts MA2022-01, n.º 20 (7 de julho de 2022): 1101. http://dx.doi.org/10.1149/ma2022-01201101mtgabs.

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LEDs are the foundation of lighting and display products surrounding us. While they have obtained great success in the commercial market, related research and development activities remain highly active aiming to enhance factors such as energy efficiency, stability, and environmental sustainability. Currently, commercial LED products are comprised of two key components: an indium gallium nitride e LED backlight with emission centered at 450 nm to cover the blue region of the visible spectrum, and powder inorganic phosphors on top converting blue light into longer wavelengths (e.g., green and red) to tune the emission of the device. A drawback of inorganic phosphors is that scattering of the emission from the micron-sized phosphor powders leads to substantial backscattering and subsequent absorption of the emission into the LED chip, and reabsorption losses in the phosphor itself, both of which reduce the overall light output of the final LED device. Organic dyes possess environmental advantages over inorganic phosphors because they are pi-conjugated molecules made from abundant elements (C, H, N, O, etc.) and are potentially bio-sourced. In this talk, I will present dyes that have been developed from theobromine, derived from cacao beans. When blended within an industrial polymer, poly(styrene-butadiene-styrene) (SBS), their enhanced solubility enables the formation of highly transparent films, crucial for reducing scattering loss in LEDs. Furthermore, resultant dye-SBS films achieved photoluminescence quantum yields (PLQYs) of around 90% under ambient conditions. Taking advantage of their transparency and solution processability, we fabricated a waveguide with this theobromine-dye-SBS composite, which was subsequentially assembled into an edge-lit LED device of no glare and enhanced aesthetics.
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17

Palenskis, Vilius, Jonas Matukas, Justinas Glemža e Sandra Pralgauskaitė. "Review of Low-Frequency Noise Properties of High-Power White LEDs during Long-Term Aging". Materials 15, n.º 1 (21 de dezembro de 2021): 13. http://dx.doi.org/10.3390/ma15010013.

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Low-frequency noise investigation is a highly sensitive and very informative method for characterization of white nitride-based light-emitting diodes (LEDs) as well as for the evaluation of their degradation. We present a review of quality and reliability investigations of high-power (1 W and 3 W) white light-emitting diodes during long-term aging at the maximum permissible forward current at room temperature. The research was centered on the investigation of blue InGaN and AlInGaN quantum wells (QWs) LEDs covered by a YAG:Ce3+ phosphor layer for white light emission. The current-voltage, light output power, and low-frequency noise characteristics were measured. A broadband silicon photodetector and two-color (blue and red) selective silicon photodetectors were used for the LED output power detection, which makes it possible to separate physical processes related to the initial blue light radiation and the phosphor luminescence. Particular attention was paid to the measurement and interpretation of the simultaneous cross-correlation coefficient between electrical and optical fluctuations. The presented method enables to determine which part of fluctuations originates in the quantum well layer of the LED. The technique using the two-color selective photodetector enables investigation of changes in the noise properties of the main blue light source and the phosphor layer during the long-term aging.
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18

Hasegawa, Shota, Takuya Hasegawa, Sun Woog Kim, Ryota Yamanashi, Kazuyoshi Uematsu, Kenji Toda e Mineo Sato. "Single Crystal Growth and Crystal Structure Analysis of Novel Orange-Red Emission Pure Nitride CaAl2Si4N8:Eu2+ Phosphor". ACS Omega 4, n.º 6 (7 de junho de 2019): 9939–45. http://dx.doi.org/10.1021/acsomega.9b00606.

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19

Huang, Yang, Weijia Wang, Jing Lin, Jianli Liang, Chao Yu, Xin He e Chengchun Tang. "Dye encapsulated in porous boron nitride microfibers: A non-rare-earth red-emitting phosphor with high efficiency". Ceramics International 43, n.º 2 (fevereiro de 2017): 2107–12. http://dx.doi.org/10.1016/j.ceramint.2016.10.191.

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20

Xu, Shichang, Yanjie Zhang, Xiuping Wu, Jinlong Wang, Bing Li e Jingjie Yu. "High-performance red@green core-shell emitting nitride phosphor with monodisperse Eu2+ luminescence centers for solid state lighting". Journal of Alloys and Compounds 875 (setembro de 2021): 160076. http://dx.doi.org/10.1016/j.jallcom.2021.160076.

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21

Hoon Jung, Sang, Dong Seok Kang e Duk Young Jeon. "Effect of substitution of nitrogen ions to red-emitting Sr3B2O6−3/2xNx:Eu2+ oxy-nitride phosphor for the application to white LED". Journal of Crystal Growth 326, n.º 1 (julho de 2011): 116–19. http://dx.doi.org/10.1016/j.jcrysgro.2011.01.074.

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22

Ding, Jianyan, Quansheng Wu, Yanyan Li, Qiang Long, Yichao Wang, Xinlong Ma e Yuhua Wang. "α-M3B2N4 (M = Ca, Sr):Eu3+: A Nitride-based Red Phosphor with a Sharp Emission Line and Broad Excitation Band Used for WLED". Journal of Physical Chemistry C 121, n.º 18 (3 de maio de 2017): 10102–11. http://dx.doi.org/10.1021/acs.jpcc.7b01945.

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23

Nguyen, Hieu Pham Trung Pham Trung, Ravi Teja Velpula e Barsha Jain. "(Invited) InGaN/AlGaN Red-Emitting Nanowire LEDs for Monolithic Micro-LED Displays". ECS Meeting Abstracts MA2022-02, n.º 15 (9 de outubro de 2022): 819. http://dx.doi.org/10.1149/ma2022-0215819mtgabs.

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High efficiency, high color rendition and low-cost light-emitting diodes (LEDs) with low power consumption, long lifetime and high reliability are highly expected for general lighting illumination, smartphones, smartwatches, virtual reality (VR), augmented reality (AR) headsets, and micro-display applications. Nonetheless, the achievement of deep green to red-emitting LEDs using conventional III-nitride quantum well heterostructures has been difficult, due to the presence of large densities of dislocations, strong polarization fields, poor hole transport, and carrier delocalization [1]. The external quantum efficiency (EQE) of the blue and green InGaN LEDs surpassed 80% and 53%, respectively. However, due to the aforementioned issues, the current InGaN red LEDs with high Indium composition exhibit extremely low EQE which is less than 3% [2]. In this regard, LEDs using nanowire structures offer dramatically reduced strain-induced polarization fields and dislocation densities, providing ideal material structure for high efficiency full-color and even white light emission without using phosphor-converters. In this study, we have successfully designed, and fabricated high efficiency red-emitting nanowire heterostructures and demonstrated micro-LEDs with stable and strong emission at ~645 nm. Moreover, the micro-LEDs have high internal quantum efficiency of >40%. The InGaN/AlGaN nanowire micro-LED structures are grown by RF plasma-assisted molecular beam epitaxy (MBE) under nitrogen-rich condition. The LED structure consists of a 250 nm n-GaN nanowire template, 10 couples of 3 nm AlGaN quantum barrier (QB)/ 3 nm InGaN quantum well (QW) served as the active region, and a 200 nm p-GaN. During the epitaxial growth of AlGaN barriers, an AlGaN shell spontaneously forms, enabling a unique InGaN/AlGaN core-shell structure [3]. The emission color of the micro-LEDs can be defined by controlling the ratio of Ga/In flux and the substrate temperature during the MBE growth process. Detailed growth conditions and the device fabrication can be found elsewhere [3-5]. The nanowires are uniformly arranged on Si substrates, as illustrated in Figure 1(a). Figure 1(b) shows the schematic structure of the fabricated micro-LEDs. Strong red emissions were measured from the InGaN/AlGaN core-shell LEDs, as shown in Figure 1(c). At injection current of 400mA, the peak emission wavelength is at ~645nm. The red-emitting micro-LEDs exhibit stable emissions with a blue-shift of only ~ 4nm under injection current from 50 mA to 400 mA, attributed to the significantly reduced quantum-confined Stark effect (QCSE) in the nanowire structures. Moreover, full color micro-LEDs with device size from 10x10 µm2 to 100x100 µm2 have been fabricated using similar approach. Such high efficiency, high color rendering properties, and low power consumption micro-LEDs are promising candidates for emerging AR/VR devices and micro-LED display applications. References: 1. Kim, M.H., et al., Applied Physics Letters, 91 (2007) 183507; 2. Liu, X., et al., Photonics Research, 10 (2022) 587; 3. Philip, M.R., et al., Journal of Vacuum Science & Technology B, 35 (2017)02B108; 4. Bui, H.Q.T., et al., Micromachines, 10 (2019) 492; 5. Jain, B., et al., Optics Express, 28(2020) 665. Figure 1
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24

Yi, Soung Soo, e Jae Yong Jung. "Rare earth doped organic–inorganic hybrid polyhedral oligomeric silsesquioxane phosphors applied for flexible sheet and anti-counterfeiting". Materials Express 11, n.º 10 (1 de outubro de 2021): 1732–38. http://dx.doi.org/10.1166/mex.2021.2073.

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We have developed organic–inorganic hybrid polyhedral oligomeric silsequioxane (POSS) type monomer ligand 2,6-pyridinediamine-bis-propanylheptaisobutyl POSS (PDC-POSS) and synthesized rare earth (RE =Eu3+) doped hybrid complex PDC-POSS phosphors. The PDC-POSS precursor was prepared using (3-aminopropyl)heptaisobutyl POSS, 2,6-pyridinedicarboxylic acid chloride (PDC) as the host material, and then coordinated with RE3+ using europium nitrate regents to synthesize PDC-POSS:Eu3+ phosphors. The photoluminescence (PL) spectra of the PDC-POSS:Eu3+ hybrid phosphors were detected at 592, 616, 649, 693 nm under UV light (λ= 288 nm) excitation. In addition, the synthesized hybrid phosphors showed red light emission under UV light. The phosphors were demonstrated on a flexible sheet that could be applied for red emitting LEDs, and for anti-counterfeiting, which requires the film to remain hidden and identifiable only by UV light.
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25

Xie, Rong-Jun. "(Digital Presentation) Fine Nitride Phosphors for Mini-LED Backlights". ECS Meeting Abstracts MA2022-02, n.º 51 (9 de outubro de 2022): 1960. http://dx.doi.org/10.1149/ma2022-02511960mtgabs.

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Mini-LED backlights, combining color conversion materials with blue Mini-LED chips, promise traditional liquid crystal displays (LCDs) with higher luminance, better contrast and wider color gamut. As color conversion materials, Cd- or Pb-based quantum dots are usually toxic and unstable, and commercially available inorganic phosphors are quite stable and cheap, but they have a large size due to their synthesis at high temperature, and their quantum efficiency and reliability are size dependent. To make inorganic phosphors to be well combined with Mini-LED chips (usually 100 x100 μm in size) in the emerging Mini-LED backlights, the particle size of the phosphors needs to be reduced to several micrometers or sub-micrometers while the quantum efficiency remains unchanged. In this work, we prepared fine nitride phosphors by treating commercially available phosphors, including CaAlSiN3:Eu2+ and (Sr, Ba)2Si5N8:Eu2+, with ball milling, centrifuging and acid washing. The particle size of phosphors can be easily controlled by the milling speed, and the phosphors with a size varying from 0.5 to 15 mm were thus obtained. The samples remained the comparable quantum efficiency with the original ones even when their particle size was reduced to 2 μm as they contained less surface defects after acid washing. We demonstrated that red-emitting Mini-LEDs can be fabricated by combining the red phosphors with blue Mini-LED chips, which show higher external quantum efficiency, luminance and stability than those made by using quantum dots. It indicates that fine and high efficiency phosphors can be obtained by the proposed method in this work, and they have great potentials for use in Mini-LED displays.
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26

Yong Jung, Jae, e Soung Soo Yi. "Enhanced Photoluminescence Properties of Polyhedral Oligomeric Silsesquioxane-Based Hybrid Phosphors for Anti-Counterfeiting and Flexible Composite Applications". Science of Advanced Materials 13, n.º 5 (1 de maio de 2021): 748–54. http://dx.doi.org/10.1166/sam.2021.3950.

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We have described a novel organic-inorganic hybrid polyhedral oligomeric silsesquioxane (POSS) type monomer ligand 2,6-pyridinediamine-bis-propanylheptaisobutyl POSS (PDC-POSS) and synthesized it using rare-earth (RE = Eu3+, Tb3+) doped hybrid complex PDC-POSS phosphors. The PDC-POSS precursor was prepared by (3-aminopropyl) heptaisobutyl POSS, 2,6-pyridinedicarboxylic acid chloride (PDC), and then coordinated with RE3+ using europium and terbium nitrate regents to yield PDC-POSS:RE3+ phosphors. Under UV light (A = 285 nm) excitation, photoluminescence (PL) spectra of Eu3+-doped PDC-POSS were detected at 591, 615, 650, and 693 and those of Tb3+-doped PDC-POSS were monitored at 488, 544, 584, 619, and 647 nm. The thin films with good transmittance were deposited from aqueous colloidal solution of hybrid phosphors on bank notes, plastic card substrates, and cotton fibers to demonstrate the transparency of phosphor thin films, which are feasible for use in anti-counterfeiting applications, which require concealment and identification by the naked eye. In addition, a polymer composite with good flexibility that can be applied to LED chips and display was produced. Finally, it was suggested that PDC-POSS:RE3+ phosphors can be used in various applications.
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HU, Yunsheng, Weidong ZHUANG, Huaqiang HE, Ronghui LIU, Guantong CHEN, Yuanhong LIU e Xiaowei HUANG. "High temperature stability of Eu2+-activated nitride red phosphors". Journal of Rare Earths 32, n.º 1 (janeiro de 2014): 12–16. http://dx.doi.org/10.1016/s1002-0721(14)60027-2.

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Zheng, Qinmin, David T. Tan e Danmeng Shuai. "Research highlights: visible light driven photocatalysis and photoluminescence and their applications in water treatment". Environmental Science: Water Research & Technology 2, n.º 1 (2016): 13–16. http://dx.doi.org/10.1039/c5ew90026c.

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We discuss three innovative materials used in photocatalysis and photoluminescence for water treatment applications, including graphitic carbon nitride (g-C3N4), red phosphorus, and upconversion phosphors (Y2SiO5 doped with Pr and Li).
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Long, Qiang, Yanyan Li e Yuhua Wang. "Mechanism for anomalous luminescence behaviour of Eu2+-doped red-emitting magnesium nitride phosphors". RSC Advances 6, n.º 77 (2016): 73063–69. http://dx.doi.org/10.1039/c6ra14048c.

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Shi, Shi Kao, Jun Min Li e Ji Zhou. "Synthesis and Photoluminescence of Eu3+ Doped Sr2CeO4 via Carbonate Precursor". Materials Science Forum 475-479 (janeiro de 2005): 1181–84. http://dx.doi.org/10.4028/www.scientific.net/msf.475-479.1181.

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Carbonate precursor of Eu3+ doped Sr2CeO4 is obtained from a mixed solution of strontium, cerium and europium nitrate using ammonium carbonate as precipitant. Calcining the carbonate precursor at different temperatures, the Eu3+ doped Sr2CeO4 phosphor is synthesized. The phase purity of the material is closely related with the calcination temperature, and the phosphor with high purity can be achieved after the precursor annealed at 1200°C. The photoluminescence performance for Eu3+ doped Sr2CeO4 depends on the concentration of Eu3+. The excitation and emission reveal efficient energy transfer from Ce4+ to Eu3+, making the emission light from blue-white to red-white, further to red as the Eu3+ concentration gradually changes from low concentration (1 mol%) to high concentration (10 mol%).
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Huang, Wan-Yu, Fumitaka Yoshimura, Kyota Ueda, Wei Kong Pang, Bing-Jian Su, Ling-Yun Jang, Chang-Yang Chiang, Wuzong Zhou, Nguyen Hoang Duy e Ru-Shi Liu. "Domination of Second-Sphere Shrinkage Effect To Improve Photoluminescence of Red Nitride Phosphors". Inorganic Chemistry 53, n.º 24 (19 de novembro de 2014): 12822–31. http://dx.doi.org/10.1021/ic5017752.

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Tao, Tao, Ting Zhi, Xu Cen, Bin Liu, Qi Wang, Zili Xie, Peng Chen et al. "Hybrid Cyan Nitride/Red Phosphors White Light-Emitting Diodes With Micro-Hole Structures". IEEE Photonics Journal 10, n.º 5 (outubro de 2018): 1–8. http://dx.doi.org/10.1109/jphot.2018.2872035.

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33

Liu, Wanlu, Qian Liu, Jia Ni, Zhenzhen Zhou e Guanghui Liu. "(Ba,Sr)TiO3:RE perovskite phosphors (RE = Dy, Eu): nitrate pyrolysis synthesis, enhanced photoluminescence, and reversible emission against heating". RSC Advances 8, n.º 37 (2018): 20781–89. http://dx.doi.org/10.1039/c8ra01249k.

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Eu3+ and Dy3+ doped (Ba,Sr)TiO3 red and yellow phosphors were synthesized respectively. Substituting of Sr2+ for Ba2+ further enhance emission. BaTiO3:0.04Dy3+ possess an excellent thermal stability and the strongest emission recovery of 95% among the phosphors.
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34

Chen, Qiwei, Ying Shi, Jiyang Chen e Jianlin Shi. "Photoluminescence of Lu2O3:Eu3+ Phosphors Obtained by Glycine-nitrate Combustion Synthesis". Journal of Materials Research 20, n.º 6 (1 de junho de 2005): 1409–14. http://dx.doi.org/10.1557/jmr.2005.0183.

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Eu3+-doped Lu2O3 phosphors were synthesized through a novel solution combustion route using glycine as the fuel. The influence of the glycine-to-nitrate (G/N) mole ratio on the crystallite size, specific surface area, morphology, and photoluminescence of the synthesized phosphors was investigated. The ignition temperature on the properties of the products was also studied. With G/N ratio increasing from 1.0 to 1.7, the grain size increased from 35 to 118 nm accordingly, resulting in the obvious changes of the photoluminescence properties. Concentration dependence of the emission intensity revealed that the quenching concentration of europium dopant was around 5 mol% for G/N- 1.7. The intensity of the peak emission due to the 5D0 → 7F2 transition of the Eu3+ ions dropped as the grain size decreased. The charge transfer band position of Eu3+-doped lutetia phosphors shifted toward lower energy (red shift) with the reduction of crystallite sizes and also with the increase of Eu3+ concentrations.
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35

Leysour de Rohello, Erwan, Yan Suffren, Francis Gouttefangeas, Odile Merdrignac-Conanec, Olivier Guillou e François Cheviré. "Synthesis, Luminescence and Energy Transfer Properties of Ce3+/Mn2+ Co-Doped Calcium Carbodiimide Phosphors". Inorganics 11, n.º 7 (7 de julho de 2023): 291. http://dx.doi.org/10.3390/inorganics11070291.

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Ce3+-doped and Ce3+/Mn2+ co-doped calcium carbodiimide (CaCN2) phosphors were synthesized from doped calcium carbonate and carbon nitride by a solid-state reaction at 700 °C under flowing NH3 using a very short reaction time (1 h). The samples were characterized by powder X-ray diffraction, scanning electron microscopy and their diffuse reflectance and luminescence properties were investigated. Single-doped CaCN2:Ce3+ exhibits a blue emission under near-ultraviolet activation (386 nm) corresponding to the 5d1 → 2F5/2 and 5d1 → 2F7/2 transitions of Ce3+. Maximum emission is obtained at temperatures lower than 150 K and then progressively decreases up to 387 K, with an 80% drop in the emission at room temperature. Efficient energy transfers from Ce3+ to Mn2+ via a non-radiative dipole–dipole mechanism are evidenced for the co-doped samples, leading to various colored phosphors under near-ultraviolet activation (386 nm). The emission color of the obtained phosphors can be modulated from blue to red through a shade of white depending on the sensitizer/activator ratio.
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Cui, Dianpeng, Zhen Song, Zhiguo Xia e Quanlin Liu. "Luminescence Tuning, Thermal Quenching, and Electronic Structure of Narrow-Band Red-Emitting Nitride Phosphors". Inorganic Chemistry 56, n.º 19 (21 de setembro de 2017): 11837–44. http://dx.doi.org/10.1021/acs.inorgchem.7b01816.

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Schmiechen, Sebastian, Philipp Strobel, Cora Hecht, Thomas Reith, Markus Siegert, Peter J. Schmidt, Petra Huppertz, Detlef Wiechert e Wolfgang Schnick. "Nitridomagnesosilicate Ba[Mg3SiN4]:Eu2+ and Structure–Property Relations of Similar Narrow-Band Red Nitride Phosphors". Chemistry of Materials 27, n.º 5 (19 de fevereiro de 2015): 1780–85. http://dx.doi.org/10.1021/cm504604d.

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Zhou, Yujuan, Ying Xiong, Jianwen Zhang, Meijuan Li e Zhifeng Huang. "Effects of framework dopants on luminescent properties of red nitride phosphors via band structure modelling". Applied Radiation and Isotopes 200 (outubro de 2023): 110923. http://dx.doi.org/10.1016/j.apradiso.2023.110923.

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Schmiechen, Sebastian, Philipp Strobel, Cora Hecht, Thomas Reith, Markus Siegert, Peter J. Schmidt, Petra Huppertz, Detlef Wiechert e Wolfgang Schnick. "ChemInform Abstract: Nitridomagnesosilicate Ba[Mg3SiN4]:Eu2+and Structure-Property Relations of Similar Narrow-Band Red Nitride Phosphors." ChemInform 46, n.º 21 (maio de 2015): no. http://dx.doi.org/10.1002/chin.201521005.

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Qiang, Jiawei, Lei Hou, Lin Wang, Yuelan Li, Henghuan Ruan, Jinrong Li, Sen Liao e Yingheng Huang. "Boosting the red emission and luminescent thermostability of GdPO4:Eu3+ phosphors by coating with graphitic carbon nitride". Journal of Luminescence 273 (setembro de 2024): 120652. http://dx.doi.org/10.1016/j.jlumin.2024.120652.

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41

Chen, Qi Wei, Ying Shi e Jian Lin Shi. "Preparation and Characterization of a New Phosphor Lu2O3:Eu3+". Key Engineering Materials 280-283 (fevereiro de 2007): 525–28. http://dx.doi.org/10.4028/www.scientific.net/kem.280-283.525.

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Europium-doped Lu2O3 nanocrystalline powders were prepared via a novel solution combustion route, with glycine as the fuel. The crystalline size and specific surface area of the combustion derived powders are strongly dependent on the glycine-to-nitrate ratio, which can control the combustion flame temperature. XRD, SEM, TEM and BET were used to characterize the phosphors and the photoluminescence was also investigated. Lu2O3:Eu3+exhibits narrow-band red emission extending from 580-700nm with a sharp peak at 611nm, corresponding to 5D0→7F2 transition of the Eu3+ ion.
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42

Martínez Vargas, David Ricardo, Mariana J. Oviedo, Fabio da Silva Lisboa, Fernando Wypych, Gustavo A. Hirata e Gregorio Guadalupe Carbajal Arizaga. "Phosphor Dysprosium-Doped Layered Double Hydroxides Exchanged with Different Organic Functional Groups". Journal of Nanomaterials 2013 (2013): 1–8. http://dx.doi.org/10.1155/2013/730153.

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The layers of a Zn/Al layered double hydroxide (LDH) were doped with Dy3+cations. Among some compositions, the Zn2+ : Al3+ : Dy3+molar ratio equal to 30 : 9 : 1 presented a single crystalline phase. Organic anions with carboxylic, amino, sulfate, or phosphate functional groups were intercalated as single layers between LDH layers as confirmed by X-ray diffraction and infrared spectroscopy. Photoluminescence spectra of the nitrate intercalated LDH showed a wide emission band with strong intensity in the yellow region (around 574 nm), originated due to symmetry distortion of the octahedral coordination in dysprosium centers. Moreover, a broad red band emission was also detected apparently due to the presence of zinc oxide. The distorted symmetry of the dysprosium coordination environment, also confirmed by X-ray photoelectron spectroscopy analysis, was modified after the intercalation with phenyl phosphonate (PP), aspartate (Asp), adipate (Adip), and serinate (Ser) anions; the emission as measured from PL spectra of these LDH was more intense in the blue region (ca. 486 nm), thus indicating an increase in symmetry of dysprosium octahedrons. The red emission band from zinc oxide kept the same intensity after intercalation of dodecyl sulfate (DDS). An additional emission of unknown origin atλ= 767 nm was present in all LDHs.
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43

Chen, Changcheng, Wanjun Chen, Benjamin Rainwater, Lixin Liu, Hongliang Zhang, Yanxia Liu, Xiaosong Guo, Jinyuan Zhou e Erqing Xie. "M2Si5N8:Eu2+-based (M=Ca, Sr) red-emitting phosphors fabricated by nitrate reduction process". Optical Materials 33, n.º 11 (setembro de 2011): 1585–90. http://dx.doi.org/10.1016/j.optmat.2011.04.014.

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Seok Lee, Jae, Se Jin Kim, Tae Kon Kim, Rajiv K. Singh e Madhav B. Ranade. "Luminescent properties of Y2O3:Eu3+ nanophosphor prepared from urea added precursor using flame spray pyrolysis". Journal of Materials Research 24, n.º 8 (agosto de 2009): 2584–88. http://dx.doi.org/10.1557/jmr.2009.0319.

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Y2O3:Eu3+ nanophosphor was synthesized by flame spray pyrolysis (FSP) from urea added nitrate based liquid precursor. In this study, urea serves as fuel and subsequently provides additional heat in the flame zone during the synthesis of phosphor particles. The end product shows cubic phase Y2O3:Eu3+ nanophosphor successfully prepared by FSP without heat treatment. The influence of synthesis conditions such as different mol of urea and nitrate source materials in aqueous solution, and doping concentration on luminescent properties, were investigated. The characteristics of nanophosphor such as crystallinity and morphology under various experiments of conditions were carried out by x-ray diffraction (XRD) and field emission-scanning electron microscopy (FE-SEM). The particle size of product was found to be in the range of 20–30 nm from transmission electron microscopy (TEM). In photoluminescence (PL) properties, Y2O3:Eu3+ nanophosphor emitted red light with a peak wavelength of 609 nm when excited with 398 nm wavelength photons.
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45

Yang, Chih-Chieh, Chih-Min Lin, Yi-Jung Chen, Yi-Tsuo Wu, Shih-Ren Chuang, Ru-Shi Liu e Shu-Fen Hu. "Highly stable three-band white light from an InGaN-based blue light-emitting diode chip precoated with (oxy)nitride green/red phosphors". Applied Physics Letters 90, n.º 12 (19 de março de 2007): 123503. http://dx.doi.org/10.1063/1.2714326.

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46

Chen, ChangCheng, e ErQing Xie. "Synthesis and luminescence properties of red-emitting M2Si5N8:Eu2+-based (M=Ca, Sr, Ba) phosphors by a simple nitrate reduction". Science China Physics, Mechanics and Astronomy 57, n.º 3 (25 de janeiro de 2014): 433–36. http://dx.doi.org/10.1007/s11433-013-5204-4.

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47

Zhu, Qi, Ji-Guang Li, Renzhi Ma, Takayoshi Sasaki, Xiaojing Yang, Xiaodong Li, Xudong Sun e Yoshio Sakka. "Well-defined crystallites autoclaved from the nitrate/NH4OH reaction system as the precursor for (Y,Eu)2O3 red phosphor: Crystallization mechanism, phase and morphology control, and luminescent property". Journal of Solid State Chemistry 192 (agosto de 2012): 229–37. http://dx.doi.org/10.1016/j.jssc.2012.04.015.

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48

Li, Zebin, Takatoshi Seto e Yuhua Wang. "Enhanced Thermal Stability of Red‐Emitting Sr2Si5N8:Eu2+ Phosphors from Triggered Applicable Trap Level via Rare Earth Ions Co‐Doping". Advanced Functional Materials, 20 de setembro de 2023. http://dx.doi.org/10.1002/adfm.202309086.

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AbstractTo solve the problem of thermal stability of the red‐emitting phosphor Sr2Si5N8:Eu2+ with great valuable luminescence performance, trivalent rare earth ions Ln3+ (Ln = Dy, Ho, Er, Tm, Nd, and Pr) are co‐doped into Sr2Si5N8: Eu2+ lattice to form thermally robust phosphors Sr2Si5N8:Eu2+,xLn3+(Lnx‐258, 0 ≤ x ≤ 0.05). The successful incorporation of rare earth ions in the crystal structure and the regulation of luminescent properties are proven by a variety of material characterization techniques and analysis. Although the co‐doping of the selected rare earth ions reduces the luminescence intensity of the phosphor, the Dy0.01‐258 sample still has a high external quantum efficiency (EQE) of 78.6%. More importantly, the co‐doping of Dy3+ with x = 0.01 significantly improves the luminescent thermal stability of phosphors at high temperature and the luminescence intensity of Dy0.01‐258 samples at 200 °C can be maintained at 94.7% of room temperature. The thermoluminescence spectrum shows that the defects brought about by co‐doping of Dy3+ with x = 0.01 introduce trap energy levels, which can compensate for the Eu2+ luminescence at high temperature. At the same time, the cathodoluminescence mapping and spectra show that the phosphor has a high saturation current under high‐energy electron bombardment, which indicates that this nitride phosphor also has the potential to be used in field emission display (FEDs). Based on its extraordinary EQE and thermal stability data, this nitride phosphor is the first‐rate among the red phosphors for pc‐wLEDs, and has excellent application prospects in FEDs.
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49

"(Invited) Red-Emitting Manganese-Doped Aluminum Nitride Phosphor". ECS Meeting Abstracts, 2016. http://dx.doi.org/10.1149/ma2016-02/42/3166.

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Hui Yuen, Peng, Hsien Shiung Hwang e Mutharasu Devarajan. "Red (SrCa)AlSiN3:Eu2+ Nitride Phosphor Particle Size of Phosphor Converted Warm White LEDs". TELKOMNIKA Indonesian Journal of Electrical Engineering 12, n.º 7 (1 de julho de 2014). http://dx.doi.org/10.11591/telkomnika.v12i7.5885.

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