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Halogen Vacancies Enable Ligand‐Assisted Self‐Assembly of Perovskite Quantum Dots into Nanowires
Author(s) -
Pan Jun,
Li Xiyan,
Gong Xiwen,
Yin Jun,
Zhou Dianli,
Sinatra Lutfan,
Huang Renwu,
Liu Jiakai,
Chen Jie,
Dursun Ibrahim,
ElZohry Ahmed M.,
Saidaminov Makhsud I.,
Sun HongTao,
Mohammed Omar F.,
Ye Changhui,
Sargent Edward H.,
Bakr Osman M.
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201909109
Subject(s) - quantum dot , materials science , nanowire , perovskite (structure) , photoluminescence , halide , vacancy defect , nanotechnology , fabrication , optoelectronics , crystallography , chemistry , inorganic chemistry , medicine , alternative medicine , pathology
Interest has been growing in defects of halide perovskites in view of their intimate connection with key material optoelectronic properties. In perovskite quantum dots (PQDs), the influence of defects is even more apparent than in their bulk counterparts. By combining experiment and theory, we report herein a halide‐vacancy‐driven, ligand‐directed self‐assembly process of CsPbBr 3 PQDs. With the assistance of oleic acid and didodecyldimethylammonium sulfide, surface‐Br‐vacancy‐rich CsPbBr 3 PQDs self‐assemble into nanowires (NWs) that are 20–60 nm in width and several millimeters in length. The NWs exhibit a sharp photoluminescence profile (≈18 nm full‐width at‐half‐maximum) that peaks at 525 nm. Our findings provide insight into the defect‐correlated dynamics of PQDs and defect‐assisted fabrication of perovskite materials and devices.