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Strongly Emissive Lead‐Free 0D Cs3Cu2I5 Perovskites Synthesized by a Room Temperature Solvent Evaporation Crystallization for Down‐Conversion Light‐Emitting Devices and Fluorescent Inks
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2020-02-11 , DOI: 10.1002/adom.201901723 Fa Zhang 1 , Ziheng Zhao 1 , Bingkun Chen 1 , Hong Zheng 2 , Lingling Huang 1 , Yue Liu 1 , Yongtian Wang 1 , Andrey L. Rogach 3
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2020-02-11 , DOI: 10.1002/adom.201901723 Fa Zhang 1 , Ziheng Zhao 1 , Bingkun Chen 1 , Hong Zheng 2 , Lingling Huang 1 , Yue Liu 1 , Yongtian Wang 1 , Andrey L. Rogach 3
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Lead‐free 0D metal halide perovskites are emerging environmentally friendly materials exhibiting large exciton binding energy, which have recently attracted great attention for their excellent light emission properties and favorable stability. Herein, solvent evaporation crystallization at room temperature is adopted to fabricate 0D Cs3Cu2I5 perovskite millimeter‐sized crystals, which show strong blue photoluminescence (PL) with quantum yield of up to 89%, a large Stockes shift and long (microsecond) PL lifetime, originating from self‐trapped excitons. UV pumped light‐emitting diodes are demonstrated by using Cs3Cu2I5 powder as a solid‐state phosphor, and the precursor solution of these perovskite crystals is used as a fluorescent ink. Furthermore, blue‐emitting composite Cs3Cu2I5/polyvinylidene fluoride films are produced by spin coating through the solvent evaporation and followed patterning using a direct laser writing technology, which are potentially useful for displays. Finally, the solvent evaporation crystallization method is expanded to fabricate yellow emissive CsCu2I3 crystals by changing the chemical molar ratio of precursor.
中文翻译：
通过室温溶剂蒸发结晶法合成的用于下转换发光器件和荧光油墨的高发射无铅0D Cs3Cu2I5钙钛矿
无铅0D金属卤化物钙钛矿是新兴的环保材料，具有大的激子结合能，最近因其出色的发光性能和良好的稳定性而备受关注。在这里，采用室温下的溶剂蒸发结晶来制造0D Cs 3 Cu 2 I 5钙钛矿毫米大小的晶体，该晶体显示出强的蓝色光致发光（PL），量子产率高达89％，Stockes位移大且长（微秒） ）PL寿命，源自自陷激子。使用Cs 3 Cu 2 I 5演示了紫外泵浦发光二极管粉末作为固态磷光体，这些钙钛矿晶体的前体溶液用作荧光墨水。此外，发蓝光的复合Cs 3 Cu 2 I 5 /聚偏二氟乙烯薄膜是通过溶剂蒸发旋涂并随后使用直接激光写入技术进行构图而制成的，这可能对显示器有用。最后，通过改变前驱体的化学摩尔比，扩大了溶剂蒸发结晶方法以制造黄色发射的CsCu 2 I 3晶体。
更新日期：2020-04-21
中文翻译：
通过室温溶剂蒸发结晶法合成的用于下转换发光器件和荧光油墨的高发射无铅0D Cs3Cu2I5钙钛矿
无铅0D金属卤化物钙钛矿是新兴的环保材料，具有大的激子结合能，最近因其出色的发光性能和良好的稳定性而备受关注。在这里，采用室温下的溶剂蒸发结晶来制造0D Cs 3 Cu 2 I 5钙钛矿毫米大小的晶体，该晶体显示出强的蓝色光致发光（PL），量子产率高达89％，Stockes位移大且长（微秒） ）PL寿命，源自自陷激子。使用Cs 3 Cu 2 I 5演示了紫外泵浦发光二极管粉末作为固态磷光体，这些钙钛矿晶体的前体溶液用作荧光墨水。此外，发蓝光的复合Cs 3 Cu 2 I 5 /聚偏二氟乙烯薄膜是通过溶剂蒸发旋涂并随后使用直接激光写入技术进行构图而制成的，这可能对显示器有用。最后，通过改变前驱体的化学摩尔比，扩大了溶剂蒸发结晶方法以制造黄色发射的CsCu 2 I 3晶体。
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