期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 6, 期 13, 页码 2622-2628出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.5b01017
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资金
- West Light Foundation of The Chinese Academy of Sciences [XBBS-2014-04, RCPY201206]
- 1000-Talent Program (Recruitment Program of Global Expert)
- National Natural Science Foundation of China [41130746, 41302029]
- International Technology Cooperation Foundation of Autonomous Region [20136009]
- Director Foundation of XTIPC, CAS [2015RC010]
We reported a facile single-solution fabrication method to grow large-scale CH3NH3PbBr3 hybrid perovskite single crystal at room temperature. The obtained single crystal in this experiment was 14 X 14 mm. The sample's in situ photophysics properties under dark and illumination, including the surface morphology, work function, surface current distribution, microcosmic I-V 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 CH3NH3PbBr3 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.
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