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Journal articles on the topic 'Luminescence enhancement'

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Author: Grafiati

Published: 10 December 2022

Last updated: 29 January 2023

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1

Han, Qingyan, Yaqiong Zhang, Zebin Ren, Zhaojin Wang, Wei Gao, Enjie He, and Hairong Zheng. "Ag@SiO2/LaF3:Eu3+ Composite Nanostructure and Its Surface Enhanced Luminescence Effect." Journal of Nanoscience and Nanotechnology 16, no. 4 (April 1, 2016): 3759–62. http://dx.doi.org/10.1166/jnn.2016.11813.

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Ag@SiO2/LaF3:Eu3+ core–shell nanostructure was synthesized with a wet chemical method in which the SiO2 layer functioned as a separation layer between Ag-core and LaF3:Eu3+ luminescence material. With this system, surface enhanced luminescene of LaF3:Eu3+ with Ag substrate was investigated, and an obvious enhancement effect was observed. The dependence of the luminescence enhancement on the distance between the luminescence shell and the metallic core was studied too. It is believed that the enhancement effect presented by the current hybrid nanostructure system has great potential in the development of photovoltaic cells.

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2

Zhou, Pei, Nirmal Goswami, Tiankai Chen, Xiaoman Liu, and Xin Huang. "Engineering Au Nanoclusters for Relay Luminescence Enhancement with Aggregation-Induced Emission." Nanomaterials 12, no. 5 (February 25, 2022): 777. http://dx.doi.org/10.3390/nano12050777.

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The research of aggregation-induced emission (AIE) has been growing rapidly for the design of highly luminescent materials, as exemplified by the library of AIE-active materials (or AIEgens) fabricated and explored for diverse applications in different fields. Herein, we reported a relay luminescence enhancement of luminescent Au nanoclusters (Au NCs) through AIE. In addition, we demonstrated the emergence of reduced aggregation-caused luminescence by adjusting the temperature of the Au NC solution. The key to induce this effect is to attach a thermosensitive polymer poly(N-isopropylacrylamide) (PNIPAAm) on the surface of Au NCs, which will shrink at high temperature. More interestingly, the as-synthesized Au NCs-PNIPAAm can self-assemble into vesicles, resulting in an obvious decrease in the luminescence intensity in aqueous solution. The combination of relay luminescence enhancement (by AIE) and luminescence decrease (induced by thermosensitive polymers) will be beneficial to the understanding and manipulation of the optical properties of Au NCs, paving the way for their practical applications.

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3

Rigo, Maria Veronica, and Peter Geissinger. "Measurement and Optimization of Metal-Nanoparticle-Induced Luminescence Enhancement Factors in a Crossed-Optical Fiber Configuration." Journal of Nanomaterials 2010 (2010): 1–11. http://dx.doi.org/10.1155/2010/396214.

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A crossed-optical-fiber configuration comprised of silver nanoparticles covalently attached to the core of an optical fiber and labeled with luminescent ruthenium molecules is reported. A second optical fiber was placed at right angle of the fiber containing the nanoparticle/ruthenium, to form a fiber-fiber junction, and it was used to detect the luminescence from the ruthenium molecules bound to the first fiber. To employ the effect of metal-enhanced luminescence, the ruthenium complex was kept at an appropriate distance from the nanoparticles by polyelectrolyte spacer layers. For silver nanospheres, nanotriangles and nanorods and for spacer-layer thicknesses from 2–14 nm luminescence-enhancement factors were determined. A 27-fold luminescence enhancement was found when the ruthenium complex was placed 4 nm from silver nanotriangles. Finally, a calibration curve for the oxygen dependence of luminescence intensities and lifetimes of ruthenium complex is presented suggesting that the oxygen sensing capabilities of the nanoengineered-ruthenium complex are maintained.

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4

Wang, Chen, Luyao Feng, Junxiao Liu, Jing Fu, Jinglin Shen, and Wei Qi. "Manipulating the Assembly of Au Nanoclusters for Luminescence Enhancement and Circularly Polarized Luminescence." Nanomaterials 12, no. 9 (April 25, 2022): 1453. http://dx.doi.org/10.3390/nano12091453.

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Au nanocluster (AuNCs)-based luminescent functional materials have attracted the interest of researchers owing to their small size, tractable surface modification, phosphorescence lifetime and biocompatibility. However, the poor luminescence quantum yield (QY) of AuNCs limits their practical applications. Herein, we synthesized a type of AuNCs modified by 4,6-diamino-2-mercaptopyrimidine hydrate (DPT-AuNCs). Furthermore, organic acids, i.e., citric acid (CA) and tartaric acid (TA), were chosen for co-assembly with DPT-AuNCs to produce AuNCs-based luminescent materials with enhanced emission. Firstly, it was found that CA could significantly enhance the emission of DPT−AuNCs with the formation of red emission nanofibers (QY = 17.31%), which showed a potential for usage in I− detection. The n···π/π···π interaction between the CA and the DPT ligand was proposed as crucial for the emission. Moreover, chiral TA could not only improve the emission of DPT-AuNCs, but could also transfer its chirality to DPT-AuNCs and induce the formation of circularly polarized luminescence (CPL)-active nanofibers. It was demonstrated that the CPL signal could increase 4.6-fold in a ternary CA/TA/DPT-AuNCs co-assembly system. This work provides a convenient way to build AuNCs-based luminescent materials as probes, and opens a new avenue for building CPL-active materials by achiral NCs through a co-assembly strategy.

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5

Wang, Chen, Luyao Feng, Junxiao Liu, Jing Fu, Jinglin Shen, and Wei Qi. "Manipulating the Assembly of Au Nanoclusters for Luminescence Enhancement and Circularly Polarized Luminescence." Nanomaterials 12, no. 9 (April 25, 2022): 1453. http://dx.doi.org/10.3390/nano12091453.

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Au nanocluster (AuNCs)-based luminescent functional materials have attracted the interest of researchers owing to their small size, tractable surface modification, phosphorescence lifetime and biocompatibility. However, the poor luminescence quantum yield (QY) of AuNCs limits their practical applications. Herein, we synthesized a type of AuNCs modified by 4,6-diamino-2-mercaptopyrimidine hydrate (DPT-AuNCs). Furthermore, organic acids, i.e., citric acid (CA) and tartaric acid (TA), were chosen for co-assembly with DPT-AuNCs to produce AuNCs-based luminescent materials with enhanced emission. Firstly, it was found that CA could significantly enhance the emission of DPT−AuNCs with the formation of red emission nanofibers (QY = 17.31%), which showed a potential for usage in I− detection. The n···π/π···π interaction between the CA and the DPT ligand was proposed as crucial for the emission. Moreover, chiral TA could not only improve the emission of DPT-AuNCs, but could also transfer its chirality to DPT-AuNCs and induce the formation of circularly polarized luminescence (CPL)-active nanofibers. It was demonstrated that the CPL signal could increase 4.6-fold in a ternary CA/TA/DPT-AuNCs co-assembly system. This work provides a convenient way to build AuNCs-based luminescent materials as probes, and opens a new avenue for building CPL-active materials by achiral NCs through a co-assembly strategy.

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6

Pavelka, Ondrej, Klaudia Kvakova, Jozef Vesely, Jiri Mizera, Petr Cigler, and Jan Valenta. "Optically coupled gold nanostructures: plasmon enhanced luminescence from gold nanorod-nanocluster hybrids." Nanoscale 14, no. 8 (2022): 3166–78. http://dx.doi.org/10.1039/d1nr08254j.

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Assembly of two gold nanostructures, luminescent nanoclusters and plasmonic nanorods, allows for a controlled enhancement of luminescence. The system shows unprecedented degree of control over geometry and optical properties.

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7

Li, Bin, Zhi-Jun Ding, Zhiqiang Li, and Huanrong Li. "Simultaneous enhancement of mechanical strength and luminescence performance in double-network supramolecular hydrogels." Journal of Materials Chemistry C 6, no. 25 (2018): 6869–74. http://dx.doi.org/10.1039/c8tc02154f.

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We observed remarkable simultaneous enhancement of both mechanical strength and luminescence performance in the presented luminescent supramolecular hydrogels, which were obtained by copolymerization of functional lanthanide-containing co-monomers and acrylamide monomers.

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8

Sami, Hussain, Osama Younis, Yui Maruoka, Kenta Yamaguchi, Kumar Siddhant, Kyohei Hisano, and Osamu Tsutsumi. "Negative Thermal Quenching of Photoluminescence from Liquid-Crystalline Molecules in Condensed Phases." Crystals 11, no. 12 (December 13, 2021): 1555. http://dx.doi.org/10.3390/cryst11121555.

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The luminescence of materials in condensed phases is affected by not only their molecular structures but also their aggregated structures. In this study, we designed new liquid-crystalline luminescent materials based on biphenylacetylene with a bulky trimethylsilyl terminal group and a flexible alkoxy chain. The luminescence properties of the prepared materials were evaluated, with a particular focus on the effects of phase transitions, which cause changes in the aggregated structures. The length of the flexible chain had no effect on the luminescence in solution. However, in crystals, the luminescence spectral shape depended on the chain length because varying the chain length altered the crystal structure. Interestingly, negative thermal quenching of the luminescence from these materials was observed in condensed phases, with the isotropic phase obtained at high temperatures exhibiting a considerable increase in luminescence intensity. This thermal enhancement of the luminescence suggests that the less- or nonemissive aggregates formed in crystals are dissociated in the isotropic phase. These findings can contribute toward the development of new material design concepts for useful luminescent materials at high temperatures.

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9

Wen, Jing, Ding Jiang, Xueling Shan, Wenchang Wang, Fangmin Xu, and Zhidong Chen. "A novel electrochemiluminescence aptasensor for sensitive detection of kanamycin based on the synergistic enhancement effects between black phosphorus quantum dots and silver-decorated high-luminescence polydopamine nanospheres." Analyst 146, no. 11 (2021): 3493–99. http://dx.doi.org/10.1039/d1an00265a.

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Using BPQDs loaded on silver-modified high-luminescence polydopamine nanospheres (HLPNs@Ag/BP) as a luminescent material, the fabricated ECL sensor, which is based on the synergistic enhancement effects, may detect KAN sensitively and selectively.

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10

Wang, Shuaiqi, Duobin Wu, Shuming Yang, Hongyu Zhen, Zhenghuan Lin, and Qidan Ling. "Highly-efficient and stable warm white emission from perovskite/silica composites with photoactivated luminescence enhancement." Journal of Materials Chemistry C 8, no. 36 (2020): 12623–31. http://dx.doi.org/10.1039/d0tc03249b.

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Composite films based on Mn-doped perovskites emit strong and stable warm white light, and can be used as single-component luminescent material in UV-driven WLEDs. Additionally, the films exhibit interesting photoinduced-luminescence enhancement.

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11

Fauzia Abdullah, Nur Alia, Md Rahim Sahar, Khaidzir Hamzah, and Sib Krishna Ghoshal. "Luminescence Enhancement of Samarium-Doped Tellurite Glass Containing Silver Nanoparticles." Advanced Materials Research 895 (February 2014): 260–64. http://dx.doi.org/10.4028/www.scientific.net/amr.895.260.

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Samarium-doped tellurite glass embedded with silver nanoparticles are synthesized by melt quenching technique and optically characterized. The effect of silver nanoparticles on the luminescent properties of the samarium-doped sodium tellurite glass is investigated. Upon pumping with 406 nm radiation, it is found that there are four distinctive emission bands centered at 562 nm, 599 nm, 645 nm and 705 nm. In the presence of silver nanoparticles in the glass substrates, we observe significant enhancement in the intensity of these emission bands. The enhancement tends to increase with the increasing of silver nanoparticles concentration. The mechanism of luminescence enhancement is discussed in terms of localized surface plasmon resonance.

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12

Zhenlong Li, Zhenlong Li, Baoshu Wang Baoshu Wang, Licheng Xing Licheng Xing, Shaolong Liu Shaolong Liu, Na Tan Na Tan, Siguo Xiao Siguo Xiao, and Jianwen Ding Jianwen Ding. "Enhancement of upconversion luminescence of YAlO3: Er3+ by Gd3+ doping." Chinese Optics Letters 10, no. 8 (2012): 081602–81605. http://dx.doi.org/10.3788/col201210.081602.

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13

Sorokin, A. V. "Plasmon enhancement of thiacyanine J-aggregates luminescence in polymer films." Functional materials 22, no. 3 (October 1, 2015): 316–21. http://dx.doi.org/10.15407/fm22.03.316.

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14

Park, Wounjhang, Dawei Lu, and Sungmo Ahn. "Plasmon enhancement of luminescence upconversion." Chemical Society Reviews 44, no. 10 (2015): 2940–62. http://dx.doi.org/10.1039/c5cs00050e.

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15

Das, Ananda, Kyuyoung Bae, and Wounjhang Park. "Enhancement of upconversion luminescence using photonic nanostructures." Nanophotonics 9, no. 6 (May 4, 2020): 1359–71. http://dx.doi.org/10.1515/nanoph-2020-0159.

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AbstractLanthanide-based upconversion materials convert low energy infrared photons into high energy visible photons. These materials are of interest in a myriad of applications such as solar energy harvesting, color displays and photocatalysis. Upconversion nanoparticles (UCNPs) are also of interest in biological applications as bioimaging and therapeutic agents. However, the intrinsic conversion efficiency of UCNPs remains low for most applications. In this review, we survey the recent work done in increasing the upconversion emission by changing the local electric field experienced by the UCNPs using photonic nanostructures. We review both the underlying theory behind this photonic manipulation as well as experimental demonstrations of enhancement. We discuss the recent developments in the more common plasmonic designs as well as the emerging field of dielectric nanostructures. We find that improvements in design and fabrication of these nanostructures in the last few years have led to reported enhancements of over three orders of magnitude. This large enhancement has been achieved in not only nanostructures on films but also in nanostructures that can be dispersed into solution which is especially relevant for biological applications.

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16

Sun, Yi-Feng, Shu-Hong Xu, Zhi-Yong Chen, Wen-Long Pan, Hua-Can Song, and Jiang-Han Chen. "Broadband luminescence and emission enhancement." Coloration Technology 127, no. 5 (August 29, 2011): 328–34. http://dx.doi.org/10.1111/j.1478-4408.2011.00317.x.

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17

Utochnikova, Valentina V., Nikolay N. Solodukhin, Andrey A. Aslandukov, Kirill V. Zaitsev, Alena S. Kalyakina, Aleksey A. Averin, Ivan A. Ananyev, Andrei V. Churakov, and Natalia P. Kuzmina. "Luminescence Enhancement byp-Substituent Variation." European Journal of Inorganic Chemistry 2017, no. 1 (December 7, 2016): 107–14. http://dx.doi.org/10.1002/ejic.201600843.

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18

Vekshin, N. L. "Acceptor luminescence enhancement by readsorption of the donor luminescence." Journal of Applied Spectroscopy 44, no. 6 (June 1986): 624–28. http://dx.doi.org/10.1007/bf00659261.

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19

Wang, Rui, Jianguo Tang, Na Kong, Yao Wang, Jixian Liu, and Jingquan Liu. "A Nano-Silver Enhancement Effect on the Luminescence of a Ligand–Eu3+ Complex via a SiO2 Spacer." Australian Journal of Chemistry 67, no. 4 (2014): 644. http://dx.doi.org/10.1071/ch13593.

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Luminescent rare earth complex (REC) nanocomposites, Eu(TTA)3Phen attached onto Ag@SiO2 nanoshells, were fabricated by facile wet chemistry and self-assembly techniques. Transmission electron microscopy, and fourier transform infrared and UV–Vis spectroscopy were used to investigate the step-by-step fabrication. The luminescence of REC was significantly enhanced using a silver core (size: 45 nm) surrounded by a 20-nm thick silica shell. Thicker or thinner silica shells afforded tuning of the metal-enhanced luminescence. The thiophene-TTA-containing REC fluorophore was able to etch the silver core, resulting in hollow silica shells, consequently displaying no luminescence enhancing capabilities. The etching efficiency was proportional to the concentration of Eu(TTA)3Phen, and decreased with increasing shell thickness.

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20

Yu, Yu'e, Yuhao Wang, Haijun Xu, Jing Lu, Huaiwei Wang, Dacheng Li, Jianmin Dou, Yunwu Li, and Suna Wang. "Dual-responsive luminescent sensors based on two Cd-MOFs: rare enhancement toward acac and quenching toward Cr2O72−." CrystEngComm 22, no. 22 (2020): 3759–67. http://dx.doi.org/10.1039/d0ce00405g.

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21

Hor, Amy, Quoc Anh N. Luu, P. Stanley May, Mary Berry, and Steve Smith. "Non-Linear Density Dependent Upconversion Luminescence Enhancement of β-NaYF4: Yb3+: Er3+ Nanoparticles on Random Ag Nanowire Aggregates." MRS Advances 1, no. 38 (2016): 2677–82. http://dx.doi.org/10.1557/adv.2016.356.

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ABSTRACTSpectroscopic imaging and statistical analysis of NIR-to-visible upconversion luminescence (UCL) from β-NaYF4:Yb3+:Er3+ upconverting nanoparticles (UCNPs) supported on a series of random Ag nanowire aggregates reveals a density dependent UCL enhancement. Statistical analysis of the spectrally resolved upconversion images shows a non-linear dependence of upconversion luminescence enhancement with Ag nanowire surface coverage. A maximum average enhancement of 5.8× was observed for 58% surface coverage. Based on the empirically determined trend with density, it is estimated that up to 20× upconversion luminescence enhancement can be achieved at 100% surface coverage, even at high excitation intensity. This projection is commensurate with the 20× enhancement ratio observed for select locations within the imaged micro-ensemble. Time-resolved emission of the UC luminescence from UCNPs on the Ag nanowire aggregates confirms the surface plasmon effects on the UCNPs kinetics. Such Ag nanowire aggregates show potential as a scalable and relatively simple metal-enhanced upconversion substrate.

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22

Saotome, Satoru, Kazumasa Suenaga, Kazuo Tanaka, and Yoshiki Chujo. "Design for multi-step mechanochromic luminescence property by enhancement of environmental sensitivity in a solid-state emissive boron complex." Materials Chemistry Frontiers 4, no. 6 (2020): 1781–88. http://dx.doi.org/10.1039/c9qm00719a.

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The solid-state emissive boron complex with multi-step mechanochromic luminescence was designed. The crystalline sample showed gradual changes in luminescent color triggered by scratching. The design concept is illustrated.

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23

Liu, Shu-Man, Wei Chen, and Zhan-Guo Wang. "Luminescence Nanocrystals for Solar Cell Enhancement." Journal of Nanoscience and Nanotechnology 10, no. 3 (March 1, 2010): 1418–29. http://dx.doi.org/10.1166/jnn.2010.2023.

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24

Jenekhe, Samson A., and John A. Osaheni. "Enhancement of Luminescence in Polymer Nanocomposites." Chemistry of Materials 6, no. 11 (November 1994): 1906–9. http://dx.doi.org/10.1021/cm00047a002.

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25

Han, Lili, Dongcheng Zhu, Yujiang Wang, Fan Jiang, Xiyan Yang, Shuo Wang, Juan Zhao, Zhipeng Ci, and Chengwei Wang. "Luminescence and thermal stability enhancement by matrix luminescence center dispersion in Sc(V, P)O4: Dy3+ nano/submicron phosphors." CrystEngComm 20, no. 46 (2018): 7526–35. http://dx.doi.org/10.1039/c8ce01143e.

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26

Li, Xincheng. "Differences of the Luminous Principle between Laser devices and LED devices." E3S Web of Conferences 213 (2020): 02028. http://dx.doi.org/10.1051/e3sconf/202021302028.

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The concept of luminescence has been a fascinating concept to mankind. The goal of this paper is to provide insights into the mysterious phenomenon of photoluminescence occurring from natural crystal lattice materials through electron radiation processes. The research methods used in the study involve the detection, identification, and interpretation of the structure, the working principle of the luminescence concept, and the application of the concept of luminescence from written materials. The methods extracted from the materials involve biological and biochemical lab methods based on the existence of phosphorescence, chemiluminescence, bioluminescence, and finally fluorescence. The study paper also highlights the differences between LEDs and LASERS, which are the main types of luminescence producing semiconductor devices. Their variations are presented in aspects of their working principle, the type of luminescence they produce, the respective output power, and the speed, transmitting distance & cost of each. Photoluminescence is a concept whose applications are widespread in the physical and chemical processes of our daily activities. Therefore, it is important to have a sufficient understanding of the successful applications of luminescent enhancement.

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27

Hao, Ji-Na, and Bing Yan. "Highly sensitive and selective fluorescent probe for Ag+ based on a Eu3+ post-functionalized metal–organic framework in aqueous media." J. Mater. Chem. A 2, no. 42 (2014): 18018–25. http://dx.doi.org/10.1039/c4ta03990d.

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A new class of lanthanide luminescent MOFs was generated by postsynthetic modification encapsulating Eu³⁺ into the pores of MIL-121 (Eu³⁺@MIL-121). More significantly, the robust Eu³⁺@MIL-121 shows fast response and high sensitivity to Ag⁺ ions in aqueous solution, due to a great enhancement in the Eu-luminescence.

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28

Jayaswal, Yogesh K., Ghizal F. Ansari, S. K. Patidar, and Sunil Jat. "Upconversion Luminescence Enhancement In Lanthanide Ions Doped Bismuth Tellurite Glasses." Journal of Ultra Scientist of Physical Sciences Section A 34, no. 1 (January 28, 2022): 6–12. http://dx.doi.org/10.22147/jusps-a/340102.

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Lanthanide ions doped glasses are studied by researchers for upconversion luminescence. Rare earth doped bismuth tellurite glasses codoped with and without silver nanoparticle were synthesized by melt and quench procedure for the study of enhanced upconversion luminescence. Physical parameters as molar mass, molar volume, and density were evaluated. Amorphous nature of samples was verified by x-ray diffraction. DSC is carried for information of thermal properties. UV-Visible absorption and fluorescence spectra is obtained to get detail information of upconversion luminescence. Upconversion mechanism of rare earth erbium and ytterbium ions discussed. Three prominent upconversion luminescence is observed two in green region and one is in red.

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29

Takeo, Atsushi, Shuhei Ichikawa, Shogo Maeda, Dolf Timmerman, Jun Tatebayashi, and Yasufumi Fujiwara. "Droop-free amplified red emission from Eu ions in GaN." Japanese Journal of Applied Physics 60, no. 12 (December 1, 2021): 120905. http://dx.doi.org/10.35848/1347-4065/ac3b88.

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Abstract Eu-doped GaN (GaN:Eu) are novel candidates for red light-emitting diodes (LEDs). To further improve the luminescent efficiency of the GaN:Eu-based LED, the efficiency-droop under strong excitation conditions should be suppressed. In this paper, we demonstrate droop-free luminescence of GaN:Eu emitted from a sample-edge using a stripe excitation configuration. The Eu emission intensity clearly increases compared to the conventional surface-emission, and the enhancement is more pronounced for stronger excitation conditions. We clarify that the wavelength dependence of the enhancement agrees well with the optical gain spectrum of the GaN:Eu and is attributed to amplified spontaneous emission.

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30

Abdullah, M. "Effect Of Polymer Molecular Weight On The Luminescence Properties Of Nanocomposite Zinc Oxide/Polyethylene Glycol." REAKTOR 7, no. 1 (June 19, 2017): 47. http://dx.doi.org/10.14710/reaktor.7.1.47-51.

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Luminescence Properties Of Nanocomposite (Zinc Oxide/Polyethylene Glycol: Lithium ions) have been synthesized using different molecular weight of polymer. Changing the molecular weight produced no effect of the crystallinity of ZnO nanoparticles if similar molarity of ethylene glycol unit were used. However, the use of high molecular weight of polymers tended to reduce the size of nanoparticles, which implied to the enhancement in the luminescence spectra due to increasing in the particle number concentration. TEM picture of sample prepared using PEG of molecular weight 0f 500,000 exhibitef a particle size of 5 nm, which was close to the value predicted y Waaent-Schere formula or size dependent band gap.Keywords : nanocomposite, luminescent polymer electrolytes, zinc oxide, polyethylene glycol

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31

Fu, Linna, Jie Wang, Na Chen, Qinqin Ma, Danqing Lu, and Quan Yuan. "Enhancement of long-lived luminescence in nanophosphors by surface defect passivation." Chemical Communications 56, no. 49 (2020): 6660–63. http://dx.doi.org/10.1039/d0cc02658a.

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32

Vini, Kalathil, Cheruvathur adukkathayar Aparna, and Kavukuzhi Meerasahib Nissamudeen. "A brief review on the techniques used for the enhancement of luminescence of red emitting thin film." European Physical Journal Applied Physics 89, no. 3 (March 2020): 30301. http://dx.doi.org/10.1051/epjap/2020190280.

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In the past few years, red emitting thin film activated by Eu3+ has received much attention. Europium has a peculiar property that it exhibits both types of emission on the basis of their valencies. In this review, we try to make a full list of known methods which may be useful for the enhancement of luminescence. It has been found that luminescence can be enhanced by increasing substrate temperature, film roughness, changing the morphology etc. Finally we discuss the mechanism of co-doping with different elements for the enhancement of luminescence.

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33

Liu, Jinhua, Qingru Wang, Xu Sang, Huimin Hu, Shuhong Li, Dong Zhang, Cailong Liu, et al. "Modulated Luminescence of Lanthanide Materials by Local Surface Plasmon Resonance Effect." Nanomaterials 11, no. 4 (April 19, 2021): 1037. http://dx.doi.org/10.3390/nano11041037.

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Lanthanide materials have great applications in optical communication, biological fluorescence imaging, laser, and so on, due to their narrow emission bandwidths, large Stokes’ shifts, long emission lifetimes, and excellent photo-stability. However, the photon absorption cross-section of lanthanide ions is generally small, and the luminescence efficiency is relatively low. The effective improvement of the lanthanide-doped materials has been a challenge in the implementation of many applications. The local surface plasmon resonance (LSPR) effect of plasmonic nanoparticles (NPs) can improve the luminescence in different aspects: excitation enhancement induced by enhanced local field, emission enhancement induced by increased radiative decay, and quenching induced by increased non-radiative decay. In addition, plasmonic NPs can also regulate the energy transfer between two close lanthanide ions. In this review, the properties of the nanocomposite systems of lanthanide material and plasmonic NPs are presented, respectively. The mechanism of lanthanide materials regulated by plasmonic NPs and the scientific and technological discoveries of the luminescence technology are elaborated. Due to the large gap between the reported enhancement and the theoretical enhancement, some new strategies applied in lanthanide materials and related development in the plasmonic enhancing luminescence are presented.

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34

Chang, Meiqi, Yanhua Song, Ye Sheng, Jie Chen, and Haifeng Zou. "Understanding the remarkable luminescence enhancement via SiO2 coating on TiO2:Eu3+ nanofibers." Physical Chemistry Chemical Physics 19, no. 26 (2017): 17063–74. http://dx.doi.org/10.1039/c7cp01113j.

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35

Kuzman, Sanja, Jovana Periša, Vesna Đorđević, Ivana Zeković, Ivana Vukoje, Željka Antić, and Miroslav D. Dramićanin. "Surface Plasmon Enhancement of Eu3+ Emission Intensity in LaPO4/Ag Nanoparticles." Materials 13, no. 14 (July 10, 2020): 3071. http://dx.doi.org/10.3390/ma13143071.

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A promising way to improve the performance of luminescent materials is to combine them with noble metal nanoparticles. Herein, a set of silver/europium-doped lanthanum orthophosphate (Ag/La0.95Eu0.05PO4) nanostructures with different concentrations of silver nanoparticles were prepared and investigated. The presented overlap between the strongest europium (Eu3+) excitation line and the broad silver nanoparticle surface plasmon resonance makes the combination prospective for coupling. X-ray powder diffraction confirmed the monoclinic monazite structure. The transmission electron microscopy revealed particles with a rod-like shape and ~4 aspect ratio. Photoluminescence spectra show characteristic Eu3+ ion red emission. One of the requirements for an enhanced luminescence effect is the precise control of the distance between the noble metal nanoparticles and the emitter ion. The distance is indirectly varied throughout the change of Ag nanoparticle concentration in the La0.95Eu0.05PO4 host. The emission intensity increases with the increase in Ag nanoparticles up to 0.6 mol %, after which the luminescence decreases due to the nanoparticles’ close packing and aggregation leading to the displacement of La0.95Eu0.05PO4 from the vicinity of the metal particles and reabsorption of the emitted light. The emission intensity of La0.95Eu0.05PO4 increases more than three times when the Eu3+ excitation is supported by the localized surface plasmon resonance in the Ag/La0.95Eu0.05PO4 nanostructures.

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Yang, Tingyu, Jinglei Qin, Jinling Zhang, Lanying Guo, Mu Yang, Xi Wu, Mei You, and Hongshang Peng. "Recent Progresses in NIR-II Luminescent Bio/Chemo Sensors Based on Lanthanide Nanocrystals." Chemosensors 10, no. 6 (May 30, 2022): 206. http://dx.doi.org/10.3390/chemosensors10060206.

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Fluorescent bio/chemosensors are widely used in the field of biological research and medical diagnosis, with the advantages of non-invasiveness, high sensitivity, and good selectivity. In particular, luminescent bio/chemosensors, based on lanthanide nanocrystals (LnNCs) with a second near-infrared (NIR-II) emission, have attracted much attention, owing to greater penetration depth, aside from the merits of narrow emission band, abundant emission lines, and long lifetimes. In this review, NIR-II LnNCs-based bio/chemo sensors are summarized from the perspectives of the mechanisms of NIR-II luminescence, synthesis method of LnNCs, strategy of luminescence enhancement, sensing mechanism, and targeted bio/chemo category. Finally, the problems that exist in present LnNCs-based bio/chemosensors are discussed, and the future development trend is prospected.

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Krieke, Guna, Andris Antuzevics, Krisjanis Smits, and Donats Millers. "Enhancement of persistent luminescence in Ca2SnO4: Sm3+." Optical Materials 113 (March 2021): 110842. http://dx.doi.org/10.1016/j.optmat.2021.110842.

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Khomich, A. A., O. S. Kudryavtsev, T. A. Dolenko, A. A. Shiryaev, A. V. Fisenko, V. I. Konov, and I. I. Vlasov. "Anomalous enhancement of nanodiamond luminescence upon heating." Laser Physics Letters 14, no. 2 (January 6, 2017): 025702. http://dx.doi.org/10.1088/1612-202x/aa52f5.

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Sun, Gregory, and Jacob B. Khurgin. "Plasmon Enhancement of Luminescence by Metal Nanoparticles." IEEE Journal of Selected Topics in Quantum Electronics 17, no. 1 (January 2011): 110–18. http://dx.doi.org/10.1109/jstqe.2010.2047249.

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Mazzoldi, P., G. Mattei, C. Maurizio, E. Trave, T. Cesca, V. Bello, S. Mariazzi, and R. S. Brusa. "Enhancement of Er3+luminescence by metal aggregates." Radiation Effects and Defects in Solids 166, no. 5 (May 2011): 357–66. http://dx.doi.org/10.1080/10420150.2011.559240.

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Pearton, S. J., C. R. Abernathy, J. D. MacKenzie, U. Hömmerich, X. Wu, R. G. Wilson, R. N. Schwartz, J. M. Zavada, and F. Ren. "Luminescence enhancement in AlN(Er) by hydrogenation." Applied Physics Letters 71, no. 13 (September 29, 1997): 1807–9. http://dx.doi.org/10.1063/1.119405.

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42

Dirr, S., S. Wiese, H. H. Johannes, D. Ammermann, A. Böhler, W. Grahn, and W. Kowalsky. "Luminescence enhancement in microcavity organic multilayer structures." Synthetic Metals 91, no. 1-3 (December 1997): 53–56. http://dx.doi.org/10.1016/s0379-6779(98)80062-3.

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Adamo, Giorgio, Harish Natarajan Swaha Krishnamoorthy, Daniele Cortecchia, Bhumika Chaudhary, Venkatram Nalla, Nikolay I. Zheludev, and Cesare Soci. "Metamaterial Enhancement of Metal-Halide Perovskite Luminescence." Nano Letters 20, no. 11 (October 22, 2020): 7906–11. http://dx.doi.org/10.1021/acs.nanolett.0c02571.

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Chang, Horng-Yi, Yuh-Ruey Wang, Mei-Lun Wu, Li-Jiaun Lin, Ling-Na Tsai, and Syh-Yuh Cheng. "Luminescence and crystallinity enhancement using nano-oxide." Materials Chemistry and Physics 112, no. 2 (December 2008): 607–11. http://dx.doi.org/10.1016/j.matchemphys.2008.05.092.

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Chen, Wei, Xinhui Zhang, and Yining Huang. "Luminescence enhancement of EuS nanoclusters in zeolite." Applied Physics Letters 76, no. 17 (April 24, 2000): 2328–30. http://dx.doi.org/10.1063/1.126335.

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Kocher-Oberlehner, G., W. Jantsch, L. Palmetshofer, and A. Ulyashin. "Luminescence enhancement by hydrogenation of Si:Er,O." Physica E: Low-dimensional Systems and Nanostructures 16, no. 3-4 (March 2003): 347–50. http://dx.doi.org/10.1016/s1386-9477(02)00618-5.

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Chen, Wei, Ramaswami Sammynaiken, and Yining Huang. "Luminescence enhancement of ZnS:Mn nanoclusters in zeolite." Journal of Applied Physics 88, no. 9 (November 2000): 5188–93. http://dx.doi.org/10.1063/1.1314903.

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Shin, Jae-Min, In-Hwan Ahn, and Doo-Hyun Ko. "A Plasmonic Platform for Upconversion Luminescence Enhancement." ECS Meeting Abstracts MA2020-02, no. 27 (November 23, 2020): 1911. http://dx.doi.org/10.1149/ma2020-02271911mtgabs.

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Shi, Rui, Eduardo D. Martinez, Carlos D. S. Brites, and Luís D. Carlos. "Thermal enhancement of upconversion emission in nanocrystals: a comprehensive summary." Physical Chemistry Chemical Physics 23, no. 1 (2021): 20–42. http://dx.doi.org/10.1039/d0cp05069e.

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50

Obydennov, Dmitry V., Ekaterina I. Elyas, Daniil A. Shilkin, Vitaly V. Yaroshenko, Dmitriy A. Zuev, Evgeny V. Lyubin, Evgeny A. Ekimov, Oleg S. Kudryavtsev, Igor I. Vlasov, and Andrey A. Fedyanin. "Purcell enhancement of fluorescence from silicon-vacancy color centers in Mie-resonant luminescent diamond particles." Journal of Physics: Conference Series 2015, no. 1 (November 1, 2021): 012101. http://dx.doi.org/10.1088/1742-6596/2015/1/012101.

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Abstract Over the past two decades, nanosized diamond particles with various luminescent defects have found numerous applications in many areas from quantum technologies to medical science. The size and shape of diamond particles can affect drastically the luminescence of embedded color centers. Here we study diamond particles of 250–450 nm in size containing silicon-vacancy (SiV) centers. Using dark-field scattering spectroscopy, we found that fundamental Mie resonances are excited in the spectral range of interest. We then measured the fluorescence saturation curves under continuous excitation to estimate the effects of the excitation and Purcell factor enhancement on the luminescent properties of the studied particles. The results show that the saturation excitation intensity differs by several times for particles of different sizes which is well explained by the numerical model that takes into account both the Parcell factor enhancement and resonant excitation.

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