溴
量子点
介孔材料
材料科学
基质(化学分析)
铯
原位
猝灭(荧光)
吸收(声学)
热稳定性
纳米技术
光电子学
化学工程
化学
无机化学
光学
荧光
复合材料
物理
催化作用
有机化学
冶金
工程类
生物化学
作者
Peng Chen,Yufeng Liu,Zhijun Zhang,Yan Sun,Jingshan Hou,Guoying Zhao,Jun Zou,Yongzheng Fang,Jiayue Xu,Ning Dai
出处
期刊:Nanoscale
[Royal Society of Chemistry]
日期:2019-01-01
卷期号:11 (35): 16499-16507
被引量:62
摘要
Recently, CsPbX3 (X = Cl, Br, and I) perovskite quantum dots (QDs) have exhibited significant potential for application in the field of lighting. However, their self-absorption and agglomeration significantly decrease their photoluminescence when their solution is centrifuged to form a powder; this hinders their applications in the field of solid-state lighting. Currently, there is lack of efficient solutions to overcome the self-absorption issue for CsPbX3 QDs. Thus, herein, an effective strategy is proposed via the in situ growth of CsPbBr3 (CPB) QDs in a mesoporous silica (m-SiO2) matrix, where self-absorption originating from the agglomeration of the QD powder is distinctly suppressed in the m-SiO2 matrix. Furthermore, due to its higher transmissivity, some photons can transport along the channels of m-SiO2 with less light loss. As a result, the photoluminescence quantum yield (PLQY) of 68% for the CsPbBr3/m-SiO2 (CPB/MS) powder is distinctly higher than that of the discrete CPB powder (36%). In addition, the chemical stability, thermal quenching and luminous decay were evidently improved for the CPB/MS nanocomposite. Finally, a remote flexible light-emitting diode with ultrahigh stability and arbitrary bending angle was achieved, which presented a pathway for the application of CPB QDs in solid-state lighting.
科研通智能强力驱动
Strongly Powered by AbleSci AI