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| 1 | Recent advances and prospects toward blue perovskite materials and light-emitting diodes显示文摘Perovskite based light-emitting diodes(PeLEDs)have become a powerful candidate for next-generation solid-state lightings and high-definition displays due to their high photoluminescence quantum yield(PLQY),tunable emission wavelength over the visible spectrum,and narrow emission linewidths.Over the past few years,the development of red-and green-emissive PeLEDs has rapidly increased,and the corresponding external quantum efficiencies(EQE)have exceeded 20%.However,the research progress of blue-emitting PeLEDs is limited by its poor material quality and inappropriate device structure.Currently,the maximum EQE of blue PeLED is only 6.2%,which is far from the industrialization requirements.In order to promote the development of blue PeLEDs,we summarize the recent research progress of blue perovskite materials and LEDs and discuss several fatal challenges,mainly embodied in low efficiency and poor stability.In order to overcome these challenges,detailed analysis and strategies are put forward in terms of the materials and devices.For the former,we summarize the feasible strategy for the preparation of efficient and stable blue-emissive perovskites using component engineering.For the latter,we analyze the advantages and limitations of the different strategies for blue-emissive perovskite in LEDs.At the end of the review,a comprehensive outlook is detailed,including future development directions and several technical problems to be solved.Thus,we aim to highlight the significance and promote the industrialization of PeLEDs. | Tao Fang Fengjuan Zhang Shichen Yuan Haibo Zeng Jizhong Song | 2019 | InfoMat2019，1，2： | 9 |
| 2 | CsPbBr_(3)纳米片的三光子非线性吸收性质研究显示文摘为了研究不同层数纳米片在近红外二区的非线性光学吸收性质的变化,采用配体辅助再沉淀方法制备了不同层数(3~5层)的CsPbBr_(3)纳米片。以中心波长为1030 nm、脉宽为6 ps、重复频率为25 kHz的激光作为激发光源,利用Z−扫描技术研究了CsPbBr_(3)纳米片的非线性三光子吸收光学性质。研究结果表明:CsPbBr_(3)纳米片的非线性三光子吸收截面随层数减小而增大,量子限域效应增强,三层纳米片的三光子吸收截面高达4.1×10^(−71 )cm^(6)s^(2)photon^(−2)。CsPbBr_(3)纳米片在近红外二区具有优良的非线性光学吸收性质,可应用于多光子激发荧光成像领域。 | 张腾飞 张德保 张雨虹 游冠军 | 2021 | 光学仪器2021，43，1： | 1 |
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