钝化
光致发光
量子产额
钙钛矿(结构)
材料科学
纳米晶
热稳定性
光电子学
配体(生物化学)
二极管
纳米技术
化学
荧光
光学
结晶学
有机化学
物理
受体
生物化学
图层(电子)
作者
Yu Zhang,Guishun Li,Guangning Hou,Jian Lin,Maosheng Chen,Shaohua Liu,Hechun Lin,Junfeng Fang,Chengbin Jing,Junhao Chu
标识
DOI:10.1016/j.cej.2022.135270
摘要
Inorganic cesium lead halide perovskite nanocrystals (NCs) show promising application in the field of optoelectronic devices. However, the poor stability and low photoluminescence quantum yield (PLQY) have been a huge hurdle for practical applications. Ligand engineering strategy was proven to be an effective way to improve the stability and PLQY. Herein, we utilize a multidentate ligand of Boc-D-Glutamic acid (BDGA) to treat the perovskite NCs, enabling exceptional quantum yield approaching 100% and superior colloidal stability (about 10% reduction after 60 days storage at ambient conditions), as well as greatly enhanced resistance to thermal treatment and UV irradiation which can be ascribed to the surface defect passivation and an efficient ligand exchange with robust affinity and/or compensation. Besides, the as-fabricated white light-emitting diodes (WLEDs) exhibits a high luminous efficiency of 93.5 lm/W and a wide color gamut (128% of the National Television System Committee and 95% Rec. 2020). This work provides a facile route to realize high PLYQ and improve the challenging stability issue in perovskite NCs.
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