Advanced Optical Materials
Perovskite Quantum Dots: CsPbBr3‐Quantum‐Dots/Polystyrene@Silica Hybrid Microsphere Structures with Significantly Improved Stability for White LEDs
Weiqiang Yang, Fei Gao, Yue Qiu, Weizhen Liu, Haiyang Xu, Lili Yang, Yichun Liu
In article number 1900546, Weizhen Liu, Haiyang Xu, and co‐workers synthesize hybrid microspheres of CsPbBr3 perovskite quantum dots (PQDs) embedded in mesoporous polystyrene microspheres covered by a silica shell (CsPbBr3‐PQDs/MPMs@SiO2), which exhibit high photoluminescence quantum yield of 84% and significantly enhanced stability, via a simple hydrolysis–encapsulation strategy. Enhanced chemical/physical stabilities make these CsPbX3 PQDs suitable for applications even in harsh environments. A phosphor‐type white light‐emitting diode has been fabricated based on these fluorescent microspheres, demonstrating a high power efficiency of 81 lm W−1 and good continuous working stability.