| RESEARCH PAPER |
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| Effect of Reaction Time on Morphology and Fluorescence Performance of CH3NH3PbBr3 Perovskite Crystals |
| WU Yihua1, HUANG Jing1, WU Di1, CHEN Zhongzhen1, LI Dan1,ZHU Zhigang1, SHI Weiheng1,2
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1 School of Environmental and Materials Engineering, Shanghai Polytechnic University, Shanghai 201209;
2 Department of Materials Science and Engineering, Drexel University, Philadelphia 19104 |
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Abstract Recently, organic-inorganic hybrid perovskites (CH3NH3PbX3, X=Cl, Br, I) have attracted tremendous interest owing to its application in many fields, particularly in solar cells. In this paper, the effect of reaction time on morphology and fluorescence performance of hot-injection synthesized CH3NH3PbBr3 perovskite crystals was investigated. The absorption spectroscopy, fluorescence spectroscopy, XRD, TEM, SEM were adopted to analyze the perovskite crystals. As the reaction time prolonging, the morphology changed from nanoparticles to nanoplatelets, and the size and thickness increased as well. Meanwhile, the absorption peak and the photoluminescence emission peak got blue-shifted. The perovskite crystals was found to achieve the highest photoluminescence quantum yield when the reaction time was controlled at 180 s.
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Published: 08 May 2018
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2017, Vol. 31 
