| Effects of Doping Trace Sm^3＋ and Gd^3＋ on Luminescent Character of Y2O2S：Eu^3＋ |
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| 作者姓名： | Yuan Jianhui Yuan Honghui Zhang Zhenhua Cheng Yumin Wang Xiaojun |
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| 作者单位： | [1]Department of Physics and Electronic Science, Changsha University of Science ＆ Technology, Changsha 410077, China [2]Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, China [3]Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China [4]Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences. Changchun 130022. China |
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| 摘 要： | After trace Sm^3＋ ions and Gd^3＋ ions doping, the emission intensity of red phosphors Y2O2S： Eu^3 ＋ was enhanced and the voltage character （relation between emission intensity and excitation voltage） was improved while the other properties of physics and chemistry were not changed. The origins of enhancement and improvement are discussed. Probably the distortion and the defect of crystals are decreased by the substitution of Gd^3＋ for Y^3＋ instead of Eu^3＋ for Y^3＋ , and thus the Eu^3＋ crystal field is improved, and radiationless process and energy loss resulted from crystal defect are weakened, which leads to increased luminescence intensity and voltage character improvement. The overlapping fluorescent spectra of Y2O2S： Sm^3＋ emission and Y2O2S：Eu^3＋ excitation as well as Eu^3 ＋ excitation spectra transitions spectra lead to energy transfer from Sm^3 ＋ sensitization of Sm^3＋ ions fectively. containing Sm^3＋ excitation the possibility of resonance ions to Eu^3＋ ions, and the to Eu^3＋ ions is achieved effectively.
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| 关 键 词： | Y2O2S ： Eu^3＋ 稀土 掺杂 发光性能 铕 钆 钐 |
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