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Metal Halide Perovskites: From Crystal Formations to Light‐Emitting‐Diode Applications
Author(s) -
Kim YoungHoon,
Kim Sungjin,
Jo Seung Hyeon,
Lee TaeWoo
Publication year - 2018
Publication title -
small methods
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.66
H-Index - 46
ISSN - 2366-9608
DOI - 10.1002/smtd.201800093
Subject(s) - materials science , photoluminescence , light emitting diode , nanocrystal , halide , crystallite , crystal (programming language) , optoelectronics , luminescence , diode , crystallization , quantum efficiency , semiconductor , nanotechnology , chemistry , inorganic chemistry , computer science , metallurgy , organic chemistry , programming language
Metal halide perovskites (MHPs) are promising light emitters because they have high color purity, high charge‐carrier mobility, comparable energy levels with organic semiconductors, and the possibility of diverse crystal forms and various crystal formation methods. Since the first report of MHP light‐emitting diodes (PeLEDs) in 2014, many researchers have devoted efforts to increase the luminescence efficiencies of MHPs in various crystal forms, and achieved dramatically improved photoluminescence quantum efficiency of >90% in MHP emitters and external quantum efficiency of ≈14.36% in PeLEDs. Here, the recent progress regarding PeLEDs is reviewed by categorizing MHPs into three types: polycrystalline bulk films, colloidal nanocrystals, and single crystals. The main focus is on photophysical properties, crystallization methods, and mechanisms of various crystal formation, and applications to PeLEDs. Future research directions are also suggested and an outlook for MHP emitters and PeLEDs is given.