How to enhance the stability of lead halide perovskite quantum dots?

Abstract

Lead halide perovskite quantum dots (PQDs) have attracted plenty of attention in light-emitting diodes (LEDs) applications owing to their tunable bandgap, narrow bandwidth, high photoluminescence quantum yields (PL QYs), and facile fabrication. Despite applying PQDs in LEDs has found huge success, the poor stability greatly hampered their commercialization. The irreversible degradation driven by light, heat and open air leads to severely PL quenching, and then decreasing the electro-optical conversion efficiency of devices. The poor stability has attracted intense attention. Within a few years, a lot of interesting results have been published, and the reported stability of PQDs was greatly enhanced. This review describes some of the recent advances made in this area, and their applications in LED are summarized.

Doping of metal ions in CsPbX<sub>3</sub> all inorganic lead trihalide perovskite nanocrystals

“…所以, 欲实现上述一举三得之目的, 最理想 的做法是在Pb 2+ 所在格位上掺杂合适的金属离子 [43] . , 或稳 定性提升方面 [46] . 本课题组前期梳理了无机铅卤钙钛 矿纳米晶的可控液相合成策略、形貌/尺寸调控、结 构与相变、可调谐的光电性质、稳定性问题以及光电 与光伏应用等关键问题 [2] .…”