Multiple-engineering controlled growth of tunable-bandgap perovskite nanowires for high performance
Authors: Ren, KK; Wang, J; Liu, K; Huang, YB; Sun, Y; Azam, M; Jin, P; Wang, ZJ; Qu, SC; Wang, ZG
RSC ADVANCES
Volume: 9 Issue: 34 Pages: 19772-19779 Published: JUN 24 2019 Language: English
Document type: Article
DOI: 10.1039/c9ra01689a
Abstract:
Controllable growth of perovskite nanowires is very important for various applications in optical and
electrical devices. Although significant progress has been achieved in the solution method, a deep
understanding of the mechanics of growing perovskite nanowires is still lacking. Herein, we developed an
electrochemical method for growing the perovskite nanowires and studied the growth processes
systematically. The initial nucleation and crystal growth could be controlled by simply varying the
additive solvents, thus leading to two stable size ratio distributions of the perovskite nanowires.
Further, with compositional engineering, the bandgap of the perovskites could be tuned from 1.59 eV to
3.04 eV. All the as-grown perovskite nanowires displayed a unique structure with high crystallization
quality, contributing to a very high responsivity of 2.1 A W-1 and a large on/off ratio of 5 x 10(3) for
the photodetectors based on the CH3NH3PbBr3 nanowires. All of these findings demonstrate that the
optimized solution method offers a new approach to synthesize perovskite nanowires for applications in
photoelectric devices.
Full Text: https://pubs.rsc.org/en/content/articlelanding/2019/ra/c9ra01689a#!divAbstract