材料科学
钙钛矿(结构)
电致发光
纳米晶
复合数
光电子学
发光二极管
二极管
化学工程
量子产额
荧光粉
纳米技术
光致发光
光学
复合材料
图层(电子)
荧光
工程类
物理
作者
Sunqi Lou,Lin Huang,Bo‐Mei Liu,Si Shi,Tongtong Xuan,Bang Lan,Jinhui Zhang,Manrong Li,Jing Wang
标识
DOI:10.1002/adom.202101448
摘要
Abstract Perovskite nanocrystals (NCs) are considered as the next‐generation platforms for optoelectronic applications, but their poor stability greatly restricts their development. Here, we present a facile composite strategy to synthesize highly stable CsPbBr 3 /Pb‐MA composite by in situ embedding the CsPbBr 3 NCs in a C 16 H 14 Br 2 O 6 Pb 2 (Pb‐MA) organometallic compound (MOC). The CsPbBr 3 /Pb‐MA composite powders show intense green emission at 519 nm, with a photoluminescence quantum yield of about 48.5% and a full width at half‐maximum of about 17 nm. More interestingly, benefitted from the protection of MOC, the CsPbBr 3 /Pb‐MA composites can maintain 43% and 83% of initial intensity after being illuminated under blue light for 36 h and being immersed in water for 192 h, respectively. Compared to the original CsPbBr 3 NCs, the light/water stability of CsPbBr 3 /Pb‐MA composites is enhanced by about 40 and 700 times (the PL intensities maintain at about 60% of the initial one), respectively. As a proof‐of‐concept, the as‐fabricated devices exhibit a wide color gamut, 97.7% and 98.2% of Rec. 2020 for white light‐emitting diodes and laser diodes, respectively. These findings demonstrate that the combination of MOC and perovskite NCs is an optimized strategy for the exploitation of high‐performance perovskite composites for their future optoelectronic applications.
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