Large-Size CH3NH3PbBr3 Single Crystal: Growth and In Situ Characterization of the Photophysics Properties

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• 作者：Pengjun Zhao ; Jinbao Xu ; Xiaoyu Dong ; Lei Wang ; Wei Ren ; Liang Bian ; Aimin Chang
• 刊名：The Journal of Physical Chemistry Letters
• 出版年：2015
• 出版时间：July 2, 2015
• 年：2015
• 卷：6
• 期：13
• 页码：2622-2628
• 全文大小：475K
• ISSN：1948-7185

文摘

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 脳 14 mm. The sample鈥檚 in situ photophysics properties under dark and illumination, including the surface morphology, work function, surface current distribution, microcosmic I鈥?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 鈥減olarization鈥?in CH₃NH₃PbBr₃ lattice. Interestingly, the 鈥減olarization effect鈥?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.