[18a-WL2_101-1~11] 13.8 Optical properties and light-emitting devices

9:30 AM - 9:45 AM JST(12:30 AM - 12:45 AM UTC)English Presentation

[18a-WL2_101-3] Hybrid BN–Perovskite Nanocomposites as a Durable Platform for Next-Generation Light Emission

〇Sai Santosh Kumar Raavi^1,2, Rahul Murali¹, Hikaru Saito², Chihaya Adachi² (1.IIT Hyderabad, 2.Kyushu Univ,)

Keywords:

CsPbBr3 nanocrystals,BN-Perovskite nanocomposite,Defect Passivation

Colloidal lead halide perovskites offer excellent optical properties but suffer from poor stability under light and moisture. Here, we report boron nitride (BN)–CsPbBr₃ (CPB) nanocomposites synthesized via a facile hot-injection method. Optimized BN incorporation enhances photoluminescence (PL), increasing quantum yield from 50% to 85%, narrowing PL linewidth, and improving environmental stability. Electron Energy Loss Spectroscopy confirms BN encapsulation of CPB, forming a protective shell. Time-resolved PL shows an extended average lifetime from 9 to 12 ns. Femtosecond transient absorption reveals slower bleach recovery in BN–CPB, indicating effective surface-trap passivation. This work demonstrates a simple route to stable, high-efficiency perovskite nanocrystals for light-emitting applications.