Superior fluorescence and high stability of B-Si-Zn glasses based on Mn-doped CsPbBrxI3-x nanocrystals.

Abstract CsPbX 3 perovskite nanocrystals (NCs) are still limited in their use due to their extreme instability in the air as they will deteriorate in a few days, and their thermal stability is not optimistic. In this study, the red CsPbBr x I 3-x (X = 1.5, 1.0, 0.8, 0.5, 0.35, 0) NCs and Mn-doped CsPbBr x I 3-x NC in zinc borosilicate (B 2 O 3 -SiO 2 -ZnO) glass with cubic perovskite crystal structure were successfully synthesized through melt-quenching and heat-treatment method, which exhibited strong red emission in region of 572 nm–708 nm under 365 nm excitation. Additionally they are stable in the air for several months while showing excellent thermal stability. It is worth mentioning that Mn-doped CsPbBr x I 3-x NC glasses are brighter than CsPbBr x I 3-x NC glasses under UV light. Because Mn-doped CsPbBr x I 3-x NC glasses have good thermal and air stability, they can be used as a red fluorescent material. We fabricated glass with Y 3 Al 5 O 12 :Ce3+ (YAG:Ce3+) phosphor-in-glass (PiG) realized the chromaticity tuning for YAG:Ce3+ phosphor with white light-emitting-diodes (WLED). Highlights • Mn-doped CsPbBr x I 3-x NC glass with a strong red fluorescence. • The glass maintains the cubic perovskite crystal structure like NCs. • By changing the ratio of halogen, the emission band was tuned from 572 nm to 708 nm. • The glass overcomes the air instability and poor water resistant properties. • The glass can used as red phosphor and stacked on the Ce-PiG to achieve warm WLED. [ABSTRACT FROM AUTHOR]