题目：Luminescence and Stability Enhancement of CsPbBr₃Perovskite Quantum Dots through Surface Sacrificial Coating

作者：Dong Huang^a, Jun Bo^b, Ronghong Zheng^a, Chengzhao Luo^a, Xiaojuan Sun^b, Qinyi Li^a, Dongyang Shen^a, Zhishuai Zheng^a, Mengyu Chen^b, Yixing Yang^c, Aiwei Tang^d,*, Song Chen^b,*and Yu Chen^a,*

单位：

^aSchool of Optoelectronic Science and Engineering, Soochow University, Suzhou 215006, P. R. China

^bSchool of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China

^cTCL Corporate Research, Shenzhen, Guangdong 518052, China

^dKey Laboratory of Luminescence and Optical Information, Ministry of Education

School of Science, Beijing Jiaotong University, Beijing 100044, China

摘要：All-inorganic perovskite quantum dots (QDs) have emerged as a new category of low-cost semiconducting luminescent materials for optoelectronic applications. However, their poor stability has become the main challenge that impedes their potential applications. Herein, Ni-doped CsPbBr₃QDs with lead phosphate (Pb₃(PO₄)₂) shell through surface sacrificial coating (c-Ni-CsPbBr₃) have been developed based on a modified thermal injection approach. The synergistic effect of Ni doping and Pb₃(PO₄)₂coating effectively improves the stability and optical performances of CsPbBr₃QDs, including photoluminescence (PL) intensity, the average lifetime, and PL quantum yield (QY). Thus, the c-Ni-CsPbBr₃QDs demonstrate the full width at half maxima (FWHM) and PLQY being 18.42 nm and 90.77%, respectively. The PL intensity of c-Ni-CsPbBr₃can be maintained at 81% of its original value after being heated at 100 °C for 1 h. No phase transformation can be observed after being stored under ambient conditions (25 °C, 60% relative humidity (RH)) for 21 days. In addition, by combining green c-Ni-CsPbBr₃QDs, red CdSe-based QDs and the blue GaN chip, a QD enhancement film (QDEF) is fabricated to form a liquid crystal display (LCD) backlit with a wide color gamut covering cover 121% of the National Television System Committee (NTSC) standard.

影响因子：8.286

分区情况：一区

链接：https://onlinelibrary.wiley.com/doi/full/10.1002/adom.202100474