光致发光
纳米晶
耐久性
胶体
量子产额
化学工程
配体(生物化学)
材料科学
氧化物
化学稳定性
化学
纳米技术
有机化学
光电子学
光学
复合材料
受体
工程类
物理
荧光
生物化学
作者
Siyu Guo,Hu Liu,Haiyang He,Wei Wang,Lin Jiang,Xuhui Xiong,Li Wang
出处
期刊:Langmuir
[American Chemical Society]
日期:2020-05-27
卷期号:36 (24): 6775-6781
被引量:21
标识
DOI:10.1021/acs.langmuir.0c00883
摘要
Long-chain zwitterionic ligands have been demonstrated to greatly improve the chemical durability of colloidal CsPbBr3 nanocrystals (NCs) by the chelate effect. However, Br sources are toxic, and the reaction is so dynamic that it is hard to control the size of the crystal. We propose an eco-friendly strategy to improve the chemical durability of colloidal CsPbBr3 NCs. Nontoxic, inexpensive, and directly available benzoyl bromine was used as the Br source, and tri-n-octylphosphine oxide was used as the adjuvant to control the reaction kinetics. Uniform, monodispersed NCs with a size of ∼11 nm were obtained. They had high photoluminescence quantum yields (PLQYs) of above 95% and, especially, showed strong stability against attack by polar solvents. The PLQY remained 80% even after 12 cycles of purification. Furthermore, after 24 h of continuous radiation by 405 nm laser, the photoluminescence (PL) intensity showed negligible decrease, and the wavelength and full width at half-maximum of PL had no significant change.
科研通智能强力驱动
Strongly Powered by AbleSci AI