Wet-Chemical
Synthesis of Surface-Passivated Halide
Perovskite Microwires for Improved Optoelectronic Performance and
Stability
Posted on 2018-12-09 - 15:13
One-dimensional (1D) halide perovskite
materials with intrinsic
high carrier mobility and long diffusion length hold great promises
for high-performance optoelectronic devices, in which the passivation
of the surface defects is of significance for further boosting its
optoelectronic performance as well as its moisture stability. Herein,
we demonstrate a simple room-temperature wet-chemical synthetic protocol
for perovskite microwires with controlled morphologies and passivated
surface states. This strategy allows for facile assembly of hydrophobic
1H,1H-perfluorooctylamine (PFA)
molecules on the surface of the perovskite microwires owing to the
coordination binding between the amino groups of PFA and Pb2+. Both steady and time-resolved photoluminescence measurements revealed
that the passivation of PFA greatly benefit for the inhibition of
the photogenerated carriers recombination. The constructed perovskite
microwire-based photodetectors have shown increased detectivity of
4.99 × 1011 jones and responsivity of 1.27 A/W (light
power density of 1 mW/cm2). Moreover, the hydrophobic fluorocarbon
alkyl chains endow the perovskite microwires with higher resistance
toward moisture. Such coating of a water-resisting layer resulted
in greatly enhanced stability of perovskite microwires under the humidity
of 55 ± 5% over 30 days. We thus believe that our work is of
importance for the development of 1D halide perovskite photodetectors
with highly improved performance and stability.
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Ye, Qian; Zhang, Jin; Guo, Pengfei; Fan, Haibo; Shchukin, Dmitry; Wei, Bingqing; et al. (2018). Wet-Chemical
Synthesis of Surface-Passivated Halide
Perovskite Microwires for Improved Optoelectronic Performance and
Stability. ACS Publications. Collection. https://doi.org/10.1021/acsami.8b07428
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AUTHORS (7)
QY
Qian Ye
JZ
Jin Zhang
PG
Pengfei Guo
HF
Haibo Fan
DS
Dmitry Shchukin
BW
Bingqing Wei
HW
Hongqiang Wang
KEYWORDS
stabilityfluorocarbon alkyl chainspassivated surface stateslight power densitytime-resolved photoluminescence measurementsSurface-Passivated Halide Perovskite Microwiresphotogenerated carriers recombinationperovskite microwires1 D halide perovskite photodetectorsPFAhalide perovskite materialsperovskite microwire-based photodetectors