Premium
Ligand‐Controlled Formation and Photoluminescence Properties of CH 3 NH 3 PbBr 3 Nanocubes and Nanowires
Author(s) -
Zhang Feng,
Chen Cheng,
Kershaw Stephen V.,
Xiao Changtao,
Han Junbo,
Zou Bingsuo,
Wu Xing,
Chang Shuai,
Dong Yuping,
Rogach Andrey L.,
Zhong Haizheng
Publication year - 2017
Publication title -
chemnanomat
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.947
H-Index - 32
ISSN - 2199-692X
DOI - 10.1002/cnma.201700034
Subject(s) - photoluminescence , halide , perovskite (structure) , nanocrystal , crystallization , supersaturation , materials science , nanowire , colloid , ligand (biochemistry) , nanotechnology , chemical engineering , crystallography , optoelectronics , inorganic chemistry , chemistry , biochemistry , receptor , organic chemistry , engineering
Abstract Light‐emitting halide perovskites are currently emerging as promising solution‐processed materials for optoelectronic applications, and correlations between their physical properties and morphologies are important drivers to guide material and device optimization. There is still a lack of precise control of the morphology in colloidal perovskite materials, and in the related studies of their shape‐dependent optical properties. Capitalizing on our previous works on the ligand‐assisted reprecipitation synthesis of colloidal perovskite nanocrystals, we have addressed the role of key experimental parameters in determining the degree of supersaturation that drives the crystallization of CH 3 NH 3 PbBr 3 precursors. By adjusting the amount of ligands, we fabricated single crystalline CH 3 NH 3 PbBr 3 nanocubes (size: ≈500 nm) and nanowires (length: 2–4.5 μm, width: ≈100 nm), and conducted steady‐state, time‐resolved, excitation power and temperature‐dependent photoluminescence measurements to investigate their shape‐dependent photoluminescence properties.