Liquid-phase sintering of lead halide perovskites and metal-organic framework glasses

作者：Jingwei Hou, Peng Chen, Atul Shukla, Andraž Krajnc, Tiesheng Wang, Xuemei Li, Rana Doasa, Luiz H. G. Tizei, Bun Chan, Duncan N. Johnstone, Rijia Lin, Tobias U. Schülli, Isaac Martens, Dominique Appadoo, Mark S’ Ari, Zhiliang Wang, Tong Wei, Shih‐Chun Lo, Mingyuan Lu, Shichun Li, Ebinazar B. Namdas, Gregor Mali, Anthony K. Cheetham, Sean M. Collins, Vicki Chen, Lianzhou Wang, Thomas D. Bennett · 发表于：Science · 年份：2021 · DOI：10.1126/science.abf4460 · 被引用次数：284 · 研究领域：Perovskite Materials and Applications、Conducting polymers and applications、Luminescence Properties of Advanced Materials

Lead halide perovskite (LHP) semiconductors show exceptional optoelectronic properties. Barriers for their applications, however, lie in their polymorphism, instability to polar solvents, phase segregation, and susceptibility to the leaching of lead ions. We report a family of scalable composites fabricated through liquid-phase sintering of LHPs and metal-organic framework glasses. The glass acts as a matrix for LHPs, effectively stabilizing nonequilibrium perovskite phases through interfacial interactions. These interactions also passivate LHP surface defects and impart bright, narrow-band photoluminescence with a wide gamut for creating white light-emitting diodes (LEDs). The processable composites show high stability against immersion in water and organic solvents as well as exposure to heat, light, air, and ambient humidity. These properties, together with their lead self-sequestration capability, can enable breakthrough applications for LHPs.