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您的检索式：作者名="Siufung Yu"
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| 1 | The achievement of red upconversion lasing for highly stable perovskite nanocrystal glasses with the assistance of anion modulation显示文摘Perovskite materials have received extensive attention as optical gain media.However,it is tough to realize lasing using such materials on account of the unstable structure of MAPbl_(3)/CsPbl_(3)nanocrystals(NCs),and the propensity for mixed-halogen perovskites to undergo phase decomposition into bromine-rich and iodide-rich regions under intense laser irradiation.To solve this issue,we fabricated CsPbX_(3)(X=Br,I)NCs,which were embedded into a glassy matrix with high stability.In addition,by doping Brions into the CsPbl_(3) NCs to partially replace I^(-) ions,the optical efficiency and the optical gain properties were found to be significantly improved.Here,under 800 nm pulse laser excitation,red random lasing was realized with the assistance of such anion modulation.Moreover,we demonstrate that the perovskite NCs glasses(PNG)show strong water stability after immersion in water for one week,seeding a promise for application in high-definition(HD)displays and photonic devices. | Mengfeifei Jin Wei Gao Xiaojuan Liang Ying Fang Siufung Yu Ting Wang Weidong Xiang | 2021 | Nano Research2021，14，8： | 0 |
| 2 | Fabrication and photoluminescence characteristics of novel red-emitting Ba_(2)LuNbO_(6):Eu^(3+)double-perovskite phosphors on near UV WLEDs显示文摘Red emitting phosphors play a significant role in accelerating the improvement of illumination quality for white light emitting diodes(WLEDs).In this work,by using solid-state reaction method,an efficient novel Ba_(2)LuNbO_(6):Eu^(3+)phosphor with double-perovskite structure was successfully prepared.Here,a series of Ba_(2)LuNbO_(6):Eu^(3+)red phosphors can be efficiently pumped by the near-ultraviolet(UV)light and then present high-brightness at orange emission(598 nm,~5D_(0)→~7 F_(1))and red emission(610 nm,~5D_(0)→~7 F_(2)).The ratio values of 610 to 598 nm in Ba_(2)LuNbO_(6):Eu^(3+)phosphors exceed 1 when the content of Eu^(3+)is larger than 0.4 mol,because the occupation of Eu^(3+)ions is changed from Lu^(3+)ions with symmetric sites to Ba^(2+)ions with asymmetric sites.Besides,the optimized concentration of Eu^(3+)at the~5D_(0)→~7 F_(2)transitions is obtained when x=1,indicating that there is non-concentration quenching in Ba_(2)LuNbO_(6):Eu^(3+)phosphors.Moreover,the CIE chromaticity coordinates of Ba_(2)LuNbO_(6):Eu^(3+)was calculated to be(0.587,0.361),the color purity was calculated to be 72.26%and internal quenching efficiency(IQE)was measured to be 67%.Finally,the thermal stability of Ba_(2)LuNbO_(6):Eu^(3+)phosphors was also studied.Our work demonstrates that the novel double-perovskite red-emitting Ba_(2)LuNbO_(6):Eu^(3+)phosphors are prospective red emitting elements for WLEDs applications. | Haihong Guo Ting Wang Bitao Liu Wei Gao Liang Xiu Zhenen Cui Hao Zhang Qianrui Ma Shaoqing Wang Ziyang Li Longchao Guo Guilong Yan Siufung Yu Xue Yu Xuhui Xu Jianbei Qiu | 2022 | Journal of Rare Earths2022，40，8： | 0 |
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