Large-Size CH<sub>3</sub>NH<sub>3</sub>PbBr<sub>3</sub> Single Crystal:
Growth and In Situ Characterization of the Photophysics
Properties
Pengjun Zhao
Jinbao Xu
Xiaoyu Dong
Lei Wang
Wei Ren
Liang Bian
Aimin Chang
10.1021/acs.jpclett.5b01017.s001
https://acs.figshare.com/articles/journal_contribution/Large_Size_CH_sub_3_sub_NH_sub_3_sub_PbBr_sub_3_sub_Single_Crystal_Growth_and_In_Situ_Characterization_of_the_Photophysics_Properties/2051619
We reported a facile single-solution
fabrication method to grow
large-scale CH<sub>3</sub>NH<sub>3</sub>PbBr<sub>3</sub> hybrid perovskite
single crystal at room temperature. The obtained single crystal in
this experiment was 14 × 14 mm. The sample’s in situ photophysics
properties under dark and illumination, including the surface morphology,
work function, surface current distribution, microcosmic <i>I</i>–<i>V</i> curves, as well as the polarization behavior,
were in situ characterized by integrated utilization of a scanning
probe microscopy, respectively. Piezoresponse force microscopy (PFM)
phase angles indicated the existence of “polarization”
in CH<sub>3</sub>NH<sub>3</sub>PbBr<sub>3</sub> lattice. Interestingly,
the “polarization effect” was enhanced by the plus light
source. Moreover, a surface potential shift as large as 200 mV was
observed under the condition of the illumination on and off. This
research is proposed to provide an opportunity to take a fresh look
at the architectural design and photovoltaic performance origin of
the hybrid perovskite solar cells.
2015-12-17 08:34:59
PFM
200 mV
surface morphology
illumination
photophysics properties
perovskite
phase angles
room temperature
polarization behavior
light source
Situ Characterization
Piezoresponse force microscopy
work function
CH 3NH
scanning probe microscopy
CH 3NH lattice
photovoltaic performance origin
Photophysics PropertiesWe
crystal