Готові списки джерел за темами / Rare-earth doped phosphors

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Автор: Grafiati
Опубліковано: 6 вересня 2023

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Статті в журналах з теми "Rare-earth doped phosphors"

1

Xiong, H. H., C. Zhu, X. Zhao, Z. Q. Wang, and H. Lin. "Rare Earth Doped Lanthanum Calcium Borate Polycrystalline Red Phosphors." Advances in Materials Science and Engineering 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/819057.

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Single-phased Sm3+doped lanthanum calcium borate (SmxLa2−xCaB10O19, SLCB,x=0.06) polycrystalline red phosphor was prepared by solid-state reaction method. The phosphor has two main excitation peaks located at 398.5 nm and 469.0 nm, which are nicely in accordance with the emitting wavelengths of commercial near-UV and blue light emitting diode chips. Under the excitation of 398.0 nm, the dominant red emission of Sm3+in SLCB phosphor is centered at 598.0 nm corresponding to the transition of4G5/2 → 6H7/2. The Eu3+fluorescence in the red spectral region is applied as a spectroscopic probe to reveal the local site symmetry in the host lattice and, hence, Judd-Ofelt parametersΩt (t=2, 4)of Eu3+in the phosphor matrix are derived to be3.62×10-20and1.97×10-20 cm2, indicating a high asymmetrical and strong covalent environment around rare earth luminescence centers. Herein, the red phosphors are promising good candidates employed in white light emitting diodes (LEDs) illumination.
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2

Suresh, K., K. V. R. Murthy, Ch Atchyutha Rao, and N. V. Poornachandra Rao. "Rare Earth Doped Alkali Earth Sulfide Phosphors for White-Light LEDs." ISRN Condensed Matter Physics 2011 (January 19, 2011): 1–3. http://dx.doi.org/10.5402/2011/392917.

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CaS:Eu and SrS:Eu phosphors were synthesized by solid-state reaction. The effects of doping concentrations on luminescent properties of phosphors are investigated. The samples are excited using electroluminescent blue light emitting diode (460 nm) to examine them as potential coating phosphors for white-light LEDs. The excitation and emission spectra of these phosphors are broadband which can be viewed as the typical emission of Eu2+ ascribed to the 4f–5d transitions. Because of their broadband absorption in the region 400–630 nm, these phosphors meet the application requirements for blue LED chips. A white-light LED was fabricated through the integration of a 460 nm chip. The results indicate that these phosphors can be considered as candidates for the application in blue LED chip-based white-light LEDs.
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3

Jung, Jae-Yong. "Luminescent Color-Adjustable Europium and Terbium Co-Doped Strontium Molybdate Phosphors Synthesized at Room Temperature Applied to Flexible Composite for LED Filter." Crystals 12, no. 4 (April 15, 2022): 552. http://dx.doi.org/10.3390/cryst12040552.

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In this study, terbium and europium rare-earth ions were single-doped and co-doped to synthesized SoMoO4 phosphor at room temperature. The samples prepared synthesized crystalline SrMoO4 powder by the co-precipitation. Samples had a tetragonal structure in XRD analysis and d(112) spacing was changed by rare-earth doping. As the amount of rare earth added increased, a secondary phase appeared, and the structure changed. The synthesized SrMoO4:Tb3+ phosphors showed a green light emission at 544 nm under 287 nm, SrMoO4:Eu3+ phosphors showed a red light emission at 613 nm under 290 nm, and SrMoO4:[Eu3+]/[Tb3+] phosphor showed a yellow-white light emission at 544 and 613 nm when excited at 287 nm. The synthesized phosphor exhibited a change in green and red luminescence intensity based on the amount of Eu3+ doped and showed strong red luminescence as the Eu3+ doping increased. To use the SrMoO4:[Eu3+]/[Tb3+] phosphor with these characteristics in an LED color filter, a flexible composite prepared by mixing with PDMS showed green, red, and yellow-white emission under a UV-lamp.
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4

Moine, B., and G. Bizarri. "Rare-earth doped phosphors: oldies or goldies?" Materials Science and Engineering: B 105, no. 1-3 (December 2003): 2–7. http://dx.doi.org/10.1016/j.mseb.2003.08.004.

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5

Xie, Rong Jun, Mamoru Mitomo та Naoto Hirosaki. "Luminescence Properties of Rare-Earth Doped α-SiAlONs". Key Engineering Materials 317-318 (серпень 2006): 797–802. http://dx.doi.org/10.4028/www.scientific.net/kem.317-318.797.

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Rare-earth doped Ca-α-SiAlON phosphors, with the compositions of (Ca1-3/2xREx)m/2Si12-m-nAlm+nOnN16-n (RE = Ce, Sm, Eu, Tb, Yb and Dy, 0.5 ≤ m = 2n ≤ 3.0), were prepared by reaction at 1700oC for 2h under 10 atm N2. The concentration of rare earths varied from 3 to 30 at% with respect to Ca. The photoluminescence properties of the powders were investigated at room temperature. The results show that (i) strong visible emissions are observed in rare-earth doped Ca-α-SiAlONs; (ii) the emission properties can be optimized by tailoring the activator concentration and the composition of the α-SiAlON host crystal; and (iii) the yellow Eu2+-doped Ca-α-SiAlON phosphors can be used in warm white LEDs.
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6

Psuja, P., D. Hreniak, and W. Strek. "Rare-Earth Doped Nanocrystalline Phosphors for Field Emission Displays." Journal of Nanomaterials 2007 (2007): 1–7. http://dx.doi.org/10.1155/2007/81350.

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The cathodoluminescence properties of rare-earth (RE = Ce, Eu, Tb) doped nanocrystalline phosphors (Y2O3,Y3Al5O12) were investigated. Their structure and morphology were determined and correlated with optical properties. The effect of grain sizes on emission yield of RE doped nanophosphors has been investigated. A possibility of application of RE doped nanophosphors for efficient field emission display (FED) devices has been discussed.
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7

Shmulovich, J., G. W. Berkstresser, C. D. Brandle, and A. Valentino. "Single‐Crystal Rare‐Earth‐Doped Yttrium Orthosilicate Phosphors." Journal of The Electrochemical Society 135, no. 12 (December 1, 1988): 3141–51. http://dx.doi.org/10.1149/1.2095518.

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Puppalwar, S. P., S. J. Dhoble, and Animesh Kumar. "Photoluminescence in rare earth-doped complex hexafluoride phosphors." Luminescence 27, no. 1 (July 8, 2011): 39–44. http://dx.doi.org/10.1002/bio.1322.

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Wang, Xiangfu, Qing Liu, Yanyan Bu, Chun-Sheng Liu, Tao Liu, and Xiaohong Yan. "Optical temperature sensing of rare-earth ion doped phosphors." RSC Advances 5, no. 105 (2015): 86219–36. http://dx.doi.org/10.1039/c5ra16986k.

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Optical temperature sensing is a promising method to achieve the contactless temperature measurement and large-scale imaging. The current status of optical thermometry of rare-earth ions doped phosphors is reviewed in detail.
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Tatte, S. P., N. S. Dhoble, G. C. Mishra, and S. J. Dhoble. "Synthesis characterization and Luminescence Properties of B2BiMg2V3O12 based phosphors with rare earth activated Dy3+ phosphor for solid state lighting." IOP Conference Series: Materials Science and Engineering 1258, no. 1 (October 1, 2022): 012016. http://dx.doi.org/10.1088/1757-899x/1258/1/012016.

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Highly new efficient vanadate based phosphor B2BiMg2V3O12 (B= K & Na) material incapacitated through rare-earth Dysprosium (Dy) and it was characterized by high temperature solid-state synthesis. Equipped phosphor was established by X-ray diffraction method. In Photo-luminescence measurements shows that the prepared phosphors doped by Dy is excited by near UV ultraviolet light reaching after 300 nm to 380 nm efficiently acceptable to recognize the emission in visible spectrum (in the range 400 nm –570 nm. The highly efficient prepared phosphor doped with lanthanide doped with Dy phosphor likewise showed the exact emission point at 487 nm and 571 nm at the excitation point at 325 nm. Hence, these prepared phosphors can find numerous applications as green emitting phosphor in the field of solid-state lighting area.
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Дисертації з теми "Rare-earth doped phosphors"

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Shalav, Avi School of Photovoltaic &amp Renewable Energy Engineering UNSW. "Rare-earth doped up-converting phosphors for an enhanced silicon solar cell response." Awarded by:University of New South Wales. School of Photovoltaic and Renewable Energy Engineering, 2006. http://handle.unsw.edu.au/1959.4/24184.

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Photovoltaic solar cells can generate electricity directly from sunlight without emitting harmful greenhouse gases. This makes them ideal candidates as large scale future energy producers for the global energy economy. Ideally, solar cells should be efficient and inexpensive to compete in the global energy market. Unfortunately, a number of fundamental limitations exist for the efficiency due to fundamental loss mechanisms of the semiconductor materials used to make solar cells. One of the dominant loss mechanisms from a conventional silicon solar cell is the transparency of sub-bandgap near-infrared photons. Up-conversion is an optical process involving the sequential absorption of lower energy photons followed by luminescence of a higher energy photon. This mechanism could be exploited to minimise photovoltaic sub-bandgap losses. Rare-earth doped materials have ideal up-conversion luminescent properties and have been utilised for many near-infrared to visible applications. This thesis investigates the near-infrared to near-infrared up-conversion processes required for the sub-bandgap photon utilisation within a silicon photovoltaic device. Various sodium yttrium fluoride phosphors doped with rare-earths were characterised theoretically and experimentally. Erbium doped phosphors were found to be ideal for single wavelength power dependent investigations for the non-linear up-conversion processes. The radiative and non-radiative rates of various erbium doped sodium yttrium fluoride phosphors have been approximated and compared with experimental photoluminescence results. These phosphors have been applied to the rear of a bi-facial silicon solar cell and an enhancement in the near-infrared region has been demonstrated. An external quantum efficiency close to 3.4% was measured at 1523nm under 6mW laser excitation. The non-linear dependence on incident pump power has been investigated along with the dominant up-conversion mechanisms involved. It can be concluded that up-conversion phosphors can enhance the near-infrared spectral response of a silicon device. These phosphors have high luminescent efficiencies once up-conversion occurs, but suffer from poor infrared absorption and low up-conversion efficiencies. The results from this study show that relatively high doping levels of selected rare-earths into low phonon energy crystals can improve the absorption and luminescent properties of the phosphor.
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2

Gao, Yuan. "Design of rare-earth-doped inorganic phosphors and luminescence enhancement by plasmonic effects." Kyoto University, 2020. http://hdl.handle.net/2433/253288.

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Padhye, P. "Study of tunable optical properties of lanthanide-ion-doped rare earth phosphors and their applications." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2017. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/5892.

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Nishiura, Shotaro. "Preparation and Optical Properties of Rare Earth Doped Ceramic Phosphors for White Light Emitting Diode." Kyoto University, 2013. http://hdl.handle.net/2433/175019.

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Анотація:
Kyoto University (京都大学)
0048
新制・課程博士
博士(人間・環境学)
甲第17670号
人博第637号
新制||人||153(附属図書館)
24||人博||637(吉田南総合図書館)
30436
京都大学大学院人間・環境学研究科相関環境学専攻
(主査)教授 田部 勢津久, 教授 杉山 雅人, 教授 加藤 立久
学位規則第4条第1項該当
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5

Katayama, Yumiko. "Optical and photo-electric studies on quantum cutting and persistent luminescent phosphors doped with rare-earth and transition-metal ions." Kyoto University, 2014. http://hdl.handle.net/2433/188818.

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Анотація:
Kyoto University (京都大学)
0048
新制・課程博士
博士(人間・環境学)
甲第18380号
人博第693号
新制||人||166(附属図書館)
25||人博||693(吉田南総合図書館)
31238
京都大学大学院人間・環境学研究科相関環境学専攻
(主査)教授 田部 勢津久, 教授 加藤 立久, 教授 杉山 雅人, 教授 森本 芳則, 教授 山本 行男
学位規則第4条第1項該当
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6

Ireland, Terry G. "Precipitation techniques and characterisation of rare earth element doped phosphor materials." Thesis, University of Greenwich, 2008. http://gala.gre.ac.uk/6195/.

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The work in this thesis had two main aims. The first aim was to study the use of a number of precipitation methods to control the size and morphology of precursor phosphor materials for potential applications in a new generation of high definition and field emission displays. The morphological and luminescent characteristics of these precursor phosphor materials were studied after they were annealed to form their respective luminescent oxides using electron microscopy and light measuring techniques. The first set of experiments presented describes the development of a range of spherical submicron europium-doped yttrium oxide phosphor particles and their optimisation for use in the aforementioned applications. A homogeneous precipitation technique exploiting a hydrothermal decomposition of urea that provides hydroxycarbonate phosphor precursor ligands is at the centre of this work. In the presence of rare earth element nitrates the hydroxycarbonate ligands form spherical phosphor precursor particles that after annealing yield the luminescent oxides. This is followed by the presentation of a novel synthetic method using a micellar phase of rare earth element chlorides, after annealing, yielding europium-doped yttrium oxide. This method produces a variety of morphologies with crystallites as small as a few nanometres and up to hundreds of nanometres. Next is described a new precipitation method using ammonia and carbon dioxide gases that are introduced in a controlled manner into a solution of rare earth element chlorides at room temperature. Rare earth element hydroxycarbonates rapidly precipitate upon supersaturation, yielding a range of morphologies and particles sizes. The second aim of the thesis was to prepare a novel range of three-dimensional photonic band gap materials composed of conventional phosphor materials.
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7

Yamane, H., T. Kawano, K. Tatsumi, S. Muto, and Y. Fujimichi. "Quantitative determination of site occupancy of multi-rare-earth elements doped into Ca2SnO4 phosphor by electron channeling microanalysis." Elsevier, 2010. http://hdl.handle.net/2237/20789.

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Yamane, H., T. Kawano, K. Tatsumi, Y. Fujimichi, and S. Muto. "Site occupancy determination of Eu/Y doped in Ca2SnO4 phosphor by electron channeling microanalysis." Elsevier, 2011. http://hdl.handle.net/2237/20827.

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Liu, Tzu-Chen, and 劉子晨. "Structural and Luminescent Properties of Multi-functional Rare-earth Doped Phosphors." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/21693165927719900386.

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Анотація:
博士
國立臺灣大學
化學研究所
100
The applications of phosphors according to different excitation sources are versatile due to the utilization of rare earth ions. The tunable energy levels of 5d orbital and the large number of energy levels of 4f orbitals can emit photons with different wavelength. In this thesis, excitation sources from vacuum ultraviolet (VUV), ultraviolet (UV) to visible photons, and electrons are investigated. Emission ranges from UV to visible range and near-infrared (NIR) are also utilized. The third chapter focuses on the synthesis of red-emitting oxynitride phosphor. Intraconfigurational 4f → 4f transitions are designed because of the determined environment for 5d → 4f transitions. The high thermal stability reveals that β–SiAlON is a good candidate for white light-emitting diodes (wLEDs) and plasma display panels (PDP). Pr3+ ions show the possibility of an alternative for red emitting activators. In the fourth chapter, comparison of LED- and FED-used phosphors under electron bombardment is made and it suggests a new class of host lattice should be developed. Evidences from solid-state nuclear magnetic resonance (ssNMR) lead to a different explanation of the incorporation of rare-earth ions into AlN host lattice. A new phosphor composition of AlN doped with Si4+ and Ce3+ ions is synthesized and shows the validity for field emission displays. The fifth chapter includes two proposed quantum cutting (QC) rare-earth combination for enhancing the efficiency of crystalline silicon (c-Si)-based solar cells: (1) adding a sensitizer to transfer the excited energy to the donor with 4f → 4f transitions , and (2) using a broad band donor such as Eu2+ and Ce3+ ions. It is concluded that due to the high energy of phonons required for Ce3+ ions, Eu2+-Yb3+ pairs is a better choice.
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LI, YI-SIOU, and 李逸修. "Synthesis and Luminescent Properties of Alkaline Earth Metal Tellurite Phosphors Doped with Rare Earth Elements." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/7xre9h.

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碩士
明新科技大學
化學工程與材料科技系碩士班
107
The main lattice material of this study is carbonate，Doping the activation centers: Tb3+, Gd3+, Ce3+, respectively, to prepare red, green, and blue primary color phosphors，The synthesis method is a wet method in a solid-phase synthesis method， and is heated to 900℃and 1400℃at a temperature increase rate of 10℃per minute in a high-temperature furnace, and the calcination is carried out for 10 hours while the calcination is completed. The phosphor powder is finished and tested. The crystal structure is detected by X-ray diffraction (XRD), and the excitation and emission spectra of the phosphor are detected by photoluminescence (PL). Enter the CIE chromaticity coordinate map to know the exact color of the sample. 1.Sr2SiO4 series The sample with added Ce3+ ions has nonlinear optical blue light, and the sample with Tb3+ ions emits green light, while the addition of two rare piles of the earth (Ce3+, Tb3+) emits blue light and also has the characteristics of the above two samples. 2.Ba2SiO4 series The sample with Ce3+ ion added and calcined at 1400 °C has a nonlinear optical blue light. The sample with Tb3+ ion and calcined at 1400 °C emits green light while adding two rare piles of the earth (Ce3+, Tb3+) to emit blue light. With the characteristics of the above two samples, the same calcination temperature is also visible at 1400 °C. 3.Ca2SiO4 series When the calcination temperature is 1400 °C, the luminescence efficiency and crystallinity are better. The sample with Ce3+ has nonlinear optics and emits blue light; the sample with Tb3+ emits green light; while the sample with Ce3+ and Tb3+ remains at the same time. The characteristics of the aforementioned samples showed that the sample to which Gd3+ was added emitted red light.
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Книги з теми "Rare-earth doped phosphors"

1

G, Potter B., Bruce Allan J, and American Ceramic Society Meeting, eds. Synthesis and application of lanthanide-doped materials. Westerville, Ohio: American Ceramic Society, 1996.

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Частини книг з теми "Rare-earth doped phosphors"

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Mushtaq, Umer, Irfan Ayoub, Nisar Hussain, Vishal Sharma, Hendrik C. Swart, and Vijay Kumar. "Luminescence Properties of Rare-Earth-Doped CaO Phosphors." In Advanced Materials for Solid State Lighting, 149–76. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-4145-2_6.

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2

Withnall, Robert, and Jack Silver. "Physics of Light Emission from Rare Earth-Doped Phosphors." In Handbook of Visual Display Technology, 1567–76. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-14346-0_68.

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Withnall, Robert, and Jack Silver. "Physics of Light Emission from Rare Earth-Doped Phosphors." In Handbook of Visual Display Technology, 1–8. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-35947-7_68-2.

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Withnall, Robert, and Jack Silver. "Physics of Light Emission from Rare-Earth Doped Phosphors." In Handbook of Visual Display Technology, 1019–28. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-540-79567-4_68.

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Ogugua, Simon N., Robin E. Kroon, and Hendrik C. Swart. "Tunable Luminescence from Dy3+ and Pr3+ Doped Mixed Rare-Earth Oxyorthosilicate Phosphors." In Luminescent Nanomaterials, 449–79. New York: Jenny Stanford Publishing, 2022. http://dx.doi.org/10.1201/9781003277385-15.

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6

Yadav, R. S., Monika Rai, and S. B. Rai. "Upconversion Photoluminescence in the Rare Earth Doped Y2O3 Phosphor Materials." In Luminescent Materials in Display and Biomedical Applications, 229–39. First. | Boca Raton : CRC Press, Taylor & Francis Group, [2021]: CRC Press, 2020. http://dx.doi.org/10.1201/9780429025334-12.

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Noto, Luyanda L., Sefako J. Mofokeng, Fokotsa V. Molefe, Hendrik C. Swart, Angelina S. Tebele, and Mokhotjwa S. Dhlamini. "Luminescent dynamics of rare earth–doped CaTiO3 phosphors." In Spectroscopy of Lanthanide Doped Oxide Materials, 57–86. Elsevier, 2020. http://dx.doi.org/10.1016/b978-0-08-102935-0.00003-4.

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Sato, M., S. W. Kim, Y. Shimomura, T. Hasegawa, K. Toda, and G. Adachi. "Rare Earth-Doped Phosphors for White Light-Emitting Diodes." In Including Actinides, 1–128. Elsevier, 2016. http://dx.doi.org/10.1016/bs.hpcre.2016.03.001.

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Bommareddi, Rami Reddy. "Review of Rare-earth Ion Doped Phosphors for White Light Generation." In New Trends in Physical Science Research Vol. 8, 95–114. Book Publisher International (a part of SCIENCEDOMAIN International), 2022. http://dx.doi.org/10.9734/bpi/ntpsr/v8/3494a.

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Kohale, Ritesh L., Vijay B. Pawade, S. J. Dhoble, and Abdul Hakeem Deshmukh. "Rare earth ion doped Mx(PO4)/MXY(PO4) phosphate-based phosphors." In Optical Properties of Phosphate and Pyrophosphate Compounds, 87–108. Elsevier, 2021. http://dx.doi.org/10.1016/b978-0-12-823044-2.00001-2.

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Тези доповідей конференцій з теми "Rare-earth doped phosphors"

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Jakathamani, S., O. Annalakshmi, and M. T. Jose. "Thermoluminescent properties of rare earth doped lithium strontium borate phosphors." In 9TH NATIONAL CONFERENCE ON THERMOPHYSICAL PROPERTIES (NCTP-2017). Author(s), 2018. http://dx.doi.org/10.1063/1.5031742.

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2

Psuja, Piotr, Dariusz Hreniak, and Wieslaw Strek. "Rare-Earth Doped Nanocrystalline Phosphors for Field Emission Display Application." In 2006 International Students and Young Scientists Workshop - Photonics and Microsystems. IEEE, 2006. http://dx.doi.org/10.1109/stysw.2006.343669.

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Nanai, Y., Y. Sakamoto, and T. Okuno. "Luminescence Properties of Rare Earth-Doped Thiosilicate Phosphors on Silicon Substrate." In 2012 International Conference on Solid State Devices and Materials. The Japan Society of Applied Physics, 2012. http://dx.doi.org/10.7567/ssdm.2012.ps-7-16.

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Cai, Guanyu, Teresa Delgado, Cyrille Richard, and Bruno Viana. "Transition metal and rare earth doped Zn1.3Ga1.4Sn0.3O4 persistent phosphors for anti-counterfeiting applications." In Optical Components and Materials XX, edited by Michel J. Digonnet and Shibin Jiang. SPIE, 2023. http://dx.doi.org/10.1117/12.2649803.

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Psuja, P., and W. Strek. "Light source with carbon nanotubes field emission cathode and rare-earth doped nanocrystalline phosphors." In NanoScience + Engineering, edited by Elizabeth A. Dobisz and Louay A. Eldada. SPIE, 2007. http://dx.doi.org/10.1117/12.735719.

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Strojnik, Marija. "Thermoanalytical studies of coprecipitated hydroxides of yttrium and aluminum for preparation of rare-earth doped YAG phosphors." In Second Iberoamerican Meeting on Optics, edited by Daniel Malacara-Hernandez, Sofia E. Acosta-Ortiz, Ramon Rodriguez-Vera, Zacarias Malacara, and Arquimedes A. Morales. SPIE, 1996. http://dx.doi.org/10.1117/12.231019.

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Verma, Akta, and S. K. Sharma. "An investigation of down-conversion luminescence properties of rare earth doped CaMoO4 phosphors for solar cell application." In 2ND INTERNATIONAL CONFERENCE ON CONDENSED MATTER AND APPLIED PHYSICS (ICC 2017). Author(s), 2018. http://dx.doi.org/10.1063/1.5032401.

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Psuja, P., L. Marciniak, D. Hreniak, and W. Strek. "Fabrication and optical properties of selected coreshell structures with nanocrystalline rare-earth doped phosphors coated with SiO2 submicron particles." In 2007 International Students and Young Scientists Workshop on "Photonics and Microsystems". IEEE, 2007. http://dx.doi.org/10.1109/stysw.2007.4559122.

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Johnson, J. A., R. Weber, A. I. Kolesnikov, and S. Schweizer. "Glass Ceramics for High-Resolution Imaging." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-66205.

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Анотація:
Glass-ceramic materials are being developed for use in digital mammography systems. The materials are transparent x-ray storage phosphors, which are potentially less expensive than competing materials with superior performance. The materials do not suffer from loss of resolution and increased noise due to light scattering from grain boundaries, as do the currently available polycrystalline materials. The glass ceramics are based on Eu2+-doped fluorochlorozirconate glasses. These can be heat treated to nucleate Eu-doped barium chloride nanocrystals. The glass ceramic converts ionizing radiation (typically x-rays) into stable electron-hole pairs that can be “read” by scanning a stimulating light beam across the glass to cause photostimulated luminescence (PSL) emission. Measurements on the materials are ongoing to elucidate structure-property relationships developed as a result of introducing rare-earth ions and modifying process conditions. Image quality measurements indicate that the current material competes with state-of-the-art x-ray imaging plates. The paper presents results on structure, properties and future directions of the materials described above.
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Devia-Cruz, Luis Felipe, Mathew A. Duarte, Corey L. Hardin, Javier E. Garay, Yasuhiro Kodera, and Elias Penilla. "Intense photoluminescence and optical gain in rare-earth doped Polycrystalline Sapphire: a new bulk media for high-power phosphors and high-energy lasers." In Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XII, edited by Shizhuo Yin and Ruyan Guo. SPIE, 2018. http://dx.doi.org/10.1117/12.2322108.

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