Facile Synthesis of Stable CsPbBr3/SiO2 Solids Via 3-(Dimethoxymethylsilyl)propylamine: Coordination of Silica Encapsulation and Surface Passivation
- 3 March 2020
- journal article
- research article
- Published by The Electrochemical Society in ECS Journal of Solid State Science and Technology
- Vol. 9 (3), 036003
- https://doi.org/10.1149/2162-8777/ab7b48
Abstract
Embedding cesium lead bromide perovskite quantum dots (PQDs) into silica matrix has been proved as an efficient way to enhance the stability of PQDs. Here, we firstly report 3-(Dimethoxymethylsilyl)propylamine (DEMSPA) as a precursor to form coating shell. The PQDs solution and DEMSPA were mixed in the open air at the room temperature. The final product was extracted from the sol-gel solution. The luminescent properties of QDs is over 60 d of storage under ambient conditions. The PQDs/SiO2 composite powder possesses the photoluminescence quantum yield (PLQY) of 63.5%. Coating the powder on the blue chips, the white light-emitting diode (LED) exhibits a wide color gamut with 123.6% of National Television System Committee (NTSC) color triangle area. The PQDs/SiO2 composite has been proved cubic phase structure, indicating good crystallinity. The good crystallinity enables QDs to be applied as broad optoelectronic devices. (C) 2020 The Electrochemical Society ("ECS"). Published on behalf of ECS by IOP Publishing Limited.Keywords
Funding Information
- Enterprise-funded Latitudinal Research Projects of China (J2016-141, J2017-171, J2017-293 and J2017-243)
- Science and Technology Planning Project of Zhejiang Province (2018C01046)
- Shanghai Sailing Program (18YF1422500)
- Research start-up project of Shanghai Institute of Technology (YJ2018-9)
- Collaborative Innovation Fund of Shanghai Institute of Technology (XTCX2019-6)
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