Pure green emission self-crystallization CsPbBr3 quantum dot glass with Ag+ doping for stable light-emitting devices

Recently, cesium lead bromide perovskite glass has been recognized as a potential material to fabricate green light emission devices because of their high stability and excellent optical performance. However, the low photoluminescence efficiency and poor color purity ( < 525 n m ) of C s P b B r 3 quantum dot (QD) glass restricts its practical application. In this work, self-crystallization C s P b B r 3 QD glasses are successfully prepared via the melt quenching method, and the photoluminescence efficiency increases 10-fold compared with regular thermal treatment C s P b B r 3 QD glass without A g + doping. The green light-emitting devices based on bulk self-crystallization C s P b B r 3 QD glass with 0.4 mol.% A g + doping achieves a luminescence efficiency of 20.85 lm/W with a CIE (0.2084, 0.6026) under a 20 mA driving current. The present results provide new, to the best of our knowledge, insight into the application of C s P b B r 3 QD glass in the optoelectronic field.