| 反应时间对CH3NH3PbBr3钙钛矿纳米晶形貌及荧光性能的影响 |
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| 引用本文： | 吴益华,黄婧,吴迪,陈中珍,李丹,朱志刚,施惟恒.反应时间对CH3NH3PbBr3钙钛矿纳米晶形貌及荧光性能的影响[J].材料导报,2017,31(22):1-4. |
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| 作者姓名： | 吴益华 黄婧 吴迪 陈中珍 李丹 朱志刚 施惟恒 |
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| 作者单位： | 1. 上海第二工业大学环境与材料工程学院 ,上海,201209;2. 上海第二工业大学环境与材料工程学院 ,上海201209;德雷克塞尔大学材料科学与工程系 ,费城19104 |
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| 基金项目： | 国家自然科学基金(61471233);国家自然科学基金重大项目(51590902);上海高校特聘教授(东方学者)计划;上海市教委曙光计划(14SG52);上海第二工业大学重点学科(材料科学与工程,XXKZD1601) 吴益华:1981年生,博士,主要研究方向为钙钛矿发光材料 E-mail:yhwu@sspu.edu.cn 朱志刚:通讯作者,男,1977年生,博士,教授,研究方向为智能传感材料与器件 E-mail:zgzhu@sspu.edu.cn |
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| 摘 要： | 有机-无机杂化钙钛矿(CH_3NH_3PbX_3,X=Cl、Br、I)材料正成为最近全世界研究的热点,在太阳能电池、量子点发光等众多领域有着广泛的应用。本研究重点考察反应时间对热注入法合成的CH_3NH_3PbX_3纳米晶的形貌及荧光性能的影响,并采用吸收光谱、荧光光谱、X射线衍射、透射电镜及扫描电镜等手段对材料进行分析。研究表明,随着反应时间的延长,产物从6nm左右的球状纳米颗粒变为层状纳米片;反应时间继续延长,纳米片的尺寸变大,厚度变厚;同时,产物的吸收峰和荧光发射峰都发生蓝移。通过绝对量子产率的分析,发现反应时间为180s时产物的量子产率最高。
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| 关 键 词： | 钙钛矿 CH3NH3PbBr3 纳米片 荧光 热注入法 太阳能电池 |
Effect of Reaction Time on Morphology and Fluorescence Performance of CH3NH3PbBr3 Perovskite Crystals |
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| WU Yihu,HUANG Jing,WU Di,CHEN Zhongzhen,LI Dan,ZHU Zhigang and SHI Weiheng.Effect of Reaction Time on Morphology and Fluorescence Performance of CH3NH3PbBr3 Perovskite Crystals[J].Materials Review,2017,31(22):1-4. |
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| Authors: | WU Yihu HUANG Jing WU Di CHEN Zhongzhen LI Dan ZHU Zhigang and SHI Weiheng |
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| Affiliation: | School of Environmental and Materials Engineering, Shanghai Polytechnic University, Shanghai 201209,School of Environmental and Materials Engineering, Shanghai Polytechnic University, Shanghai 201209,School of Environmental and Materials Engineering, Shanghai Polytechnic University, Shanghai 201209,School of Environmental and Materials Engineering, Shanghai Polytechnic University, Shanghai 201209,School of Environmental and Materials Engineering, Shanghai Polytechnic University, Shanghai 201209,School of Environmental and Materials Engineering, Shanghai Polytechnic University, Shanghai 201209 and School of Environmental and Materials Engineering, Shanghai Polytechnic University, Shanghai 201209;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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| Keywords: | perovskite CH3NH3PbBr3 nanoplatelet photoluminescence hot-injection synthesis solar cell |
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