Synthesis and characterization of organic - inorganic perovskite CH3NH3PbI3 crystal
摘要
Abstract
Since 2012, CH3NH3PbX3钙钛矿作为新型染料敏化太阳能电池的感光材料，自2012以来，在国内外太阳能电池材料领域成为新的、重点研究的方向。本文对CH3NH3PbI3进行合成，并对合成产物进行表征。 CH3NH3PbX3 perovskite as new photosensitive material for dye sensitized solar cells has become new research direction in the field of the solar cell materials in the world. Synthesis and characterization of CH3NH3PbI3 are studied in this paper.
首先，用甲基胺溶液和氢碘酸溶液在信号转换器0℃，搅拌2h，混合均匀。混合后的溶液蒸干得到的白粉末CH3NH3I。然后，将CH3NH3I与PbI2自动关窗器同时溶于丁内酯溶液形成黄透明溶液，并将溶液在100℃的温度下加热15分钟可得到所期望的钙钛矿CH3NH3PbI3。用TG-DSC对黄透明溶液进行热重-热量变化研究。用X-射线衍射仪（XRD）和扫描电镜（SEM）对合成的CH3NH3PbI3晶体结构和表面形貌进行表征。结果表明：钙钛矿大型设备包装箱
CH3NH3PbI3在167℃以下形成，在高于167℃开始分解。在室温时，钙钛矿CH3NH3PbI3显黑，晶体结构是四方相，晶胞参数为a=b=8.872埃，c=12.637埃。SEM观察所制备的钙钛矿CH3NH3PbI3表面致密度较高。钙钛矿CH3NH3PbI3的稳定性较差，在空气放置一段时间，黑CH3NH3PbI3变成成黄。并从热力学对钙钛矿CH3NH3PbI3dc偏置
的不稳定性就行了分析讨论。 First of all, methyl amine and hydriodic acid solution were mixed and stirred at 0 ℃for 2h. CH3NH3I was obtained after drying the mixed solution. Then, the CH3NH3I and PbI2 were put in butyl lactone solution to form a yellow transparent solution, which was heated at 100
℃for 15 minutes to get the desired perovskite CH3NH3PbI3. The thermogravimetric and heat change of yellow transparent solution were done by TG-DSC. The CH3NH3PbI3 crystal structure and surface morphology were characterized by X- ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that: perovskite CH3NH3PbI3 formed at temperatures less than 167 ℃ and decomposed after the temperature over 167 ℃. Perovskite CH3NH3PbI3 shows black color and the crystalline structure of CH3NH3PbI3 at room temperature is tetragonal with unit cell parameters a=b=8.872A, c=12.637A. The perovskite CH3NH3PbI3 film has high density. Stability of perovskite CH3NH3PbI3 is poor. Black CH3NH3PbI3 in the air for a long time becomes into yellow. Instability of perovskite CH3NH3PbI3 is discussed, based on the thermodynamics
关键词：Perovskite、CH保护架3NH3PbI3、Crystalline structure、CH3设备防护箱NH3I
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