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

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 fa...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 2021-10, Vol.374 (6567), p.621-625
Main Authors: Hou, Jingwei, Chen, Peng, Shukla, Atul, Krajnc, Andraž, Wang, Tiesheng, Li, Xuemei, Doasa, Rana, Tizei, Luiz H G, Chan, Bun, Johnstone, Duncan N, Lin, Rijia, Schülli, Tobias U, Martens, Isaac, Appadoo, Dominique, Ari, Mark S', Wang, Zhiliang, Wei, Tong, Lo, Shih-Chun, Lu, Mingyuan, Li, Shichun, Namdas, Ebinazar B, Mali, Gregor, Cheetham, Anthony K, Collins, Sean M, Chen, Vicki, Wang, Lianzhou, Bennett, Thomas D
Format: Article
Language:English
Subjects:
Cesium
Chemical Sciences
Composite materials
Electronics industry
Glass
Immersion
Iodides
Ions
Lasers
Leaching
Lead
Lead compounds
Light emitting diodes
Liquid phase sintering
Liquid phases
Luminescence
Metal halides
Metal-organic frameworks
Optoelectronics
Organic solvents
Perovskites
Photoluminescence
Photons
Physics
Polymorphism
Sintering
Solvents
Stability
Submerging
Surface defects
Water immersion
White light
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Summary: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.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.abf4460