jz6b01751_si_001.pdf (2.24 MB)
Postsynthetic and Selective Control of Lead Halide Perovskite Microlasers
journal contribution
posted on 2016-09-19, 00:00 authored by Nan Zhang, Kaiyang Wang, Haohan Wei, Zhiyuan Gu, Wenzhao Sun, Jiankai Li, Shumin Xiao, Qinghai SongThe
control of photoluminescence and absorption of lead halide
perovskites plays a key role in their applications in micro- and nano-sized
light emission devices and photodetectors. To date, the wavelength
controls of lead halide perovskite microlasers are mostly realized
by changing the halide mixture in solution. Herein, we report the
postsynthetic and selective control of the optical properties of lead
halide perovskites with conventional semiconductor technology. By
selectively exposing a CH3NH3PbBr3 microstructure with chlorine in inductively coupled plasma, we find
that the wavelengths of absorption, photoluminescence, and laser emissions
of exposed structures are blue-shifted around 50 nm. Most importantly,
the device characteristics such as the photoluminescence intensities
and laser thresholds are well maintained during the reaction process.
We believe our finding will significantly boost the practical applications
of lead halide perovskite based optoelectronics.