Pure Blue Perovskites Nanocrystals in Glass: Ultrafast Laser Direct Writing and Bandgap Tuning

被引:26
|
作者
Sun, Ke [1 ]
Li, Xinkuo [2 ,3 ]
Tan, Dezhi [2 ,3 ]
Jiang, Haiyi [1 ]
Xiong, Kaiyi [1 ]
Zhang, Jie [1 ]
Xu, Beibei [1 ]
Xiao, Zhu [4 ]
Li, Zhou [4 ]
Qiu, Jianrong [1 ]
机构
[1] Zhejiang Univ, Coll Opt Sci & Engn, State Key Lab Modern Opt Instrumentat, Hangzhou 310027, Peoples R China
[2] Zhejiang Lab, Hangzhou 311121, Peoples R China
[3] Zhejiang Univ, Sch Mat Sci & Engn, Hangzhou 310027, Peoples R China
[4] Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China
基金
中国国家自然科学基金; 国家重点研发计划;
关键词
bandgap tuning; glass; perovskite nanocrystals; pure blue emission; ultrafast laser direct writing; LIQUID-PHASE-SEPARATION; QUANTUM DOTS; PASSIVATION; STABILITY; EXCHANGE; BR;
D O I
10.1002/lpor.202200902
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Chemical engineering in lead halide perovskite nanocrystals (PNCs) has garnered significant attention for tailoring optoelectronic properties, such as bandgap, quantum yield (QY), and stability. Here, pure blue emissive PNCs in glass by using ultrafast laser are reported. The emission wavelength is tuned in the range from 461 to 520 nm by engineering the chemical composition in the B-site Cd/Pb mix-cation system. The photoluminescence (PL) QY of CsCdxPb1-xBr3 PNCs reaches 13.4% for the pure blue emission at 467 nm, which is twice that of CsPbBryCl3-y PNCs. The pure blue emissive PNCs exhibit remarkable stability when exposed to ultraviolet (UV) radiation, heat, and ethanol solvents. The ultrafast laser print patterns can be encrypted and decrypted for information, which shows great potential for crucial information security applications. These results imply that B-site engineering for lead halide PNCs embedded in glass is effective to tailor the PL spectra and increase the PL QY. The pure blue emissive PNCs hold great potential in the applications of blue and full-color emissive devices.
引用
收藏
页数:8
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