发布时间 : 星期三 文章有机钙钛矿CH3NH3PbI3晶体的合成及表征观察1更新完毕开始阅读
河南科技大学毕业设计（论文）
Synthesis and characterization of organic - inorganic perovskite
CH3NH3PbI3 crystal
Abstract
Since 2012, 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.
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
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河南科技大学毕业设计（论文）
关键词：Perovskite、CH3NH3PbI3、Crystalline structure、CH3NH3I 目录
第一章 绪 论 ...................................................................................................1
§1.1钙钛矿的晶体结构 ..............................................................................1
§1.1.1原始钙钛矿 ...............................................................................1 §1.1.2有机／无机杂化晶体 ...............................................................1 §1.1.3 有机／无机杂化CH3NH3PbI3的晶体结构 .............................2 §1.2 究背景及意义 .....................................................................................2
§1.2.1 CH3NH3PbX3钙钛矿电池 .........................................................2 §1.2.2 CH3NH3PbI3钙钛矿晶体 ..........................................................3 §1.3 CH3NH3PbI3钙钛矿的合成 .................................................................4
§1.3.1 ...................................................................................................4 §1.3.2 CH3NH3PbI3钙钛矿薄膜的合成方法 .......................................4 §1.4实验的主要研究内容与目的 ..............................................................5 第二章 实验过程 ...............................................................................................6
§2.1实验材料与设备 ..................................................................................6
§2.1.1实验材料及试剂 .......................................................................6 §2.1.2实验设备...................................................................................6 §2.2 实验方法和流程 .........................................................................6 §2.2.1试样准备...................................................................................7 §2.2.2 甲胺醇与氢碘酸的反应制备MAI ...........................................7
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河南科技大学毕业设计（论文）
§2.2.3 MAI与碘化铅的反应制备CH3NH3PbI3 ..................................8 §2.2.4 XRD试样制备 ..........................................................................8 §2.2.5 SEM试样的制备 ......................................................................8 §2.2.6 TG-DSC试样的观察 ................................................................8
第三章 实验结果和数据分析 .......................................................................... 10
§3.1 TG-DSC曲线分析 ............................................................................. 10 §3.2 XRD结果 .......................................................................................... 11 §3.3 SEM结果分析 .................................................................................. 13 §3.4 MAPbI3稳定性观察 .......................................................................... 14 第四章 分析与讨论 ......................................................................................... 16
§4.1 MAPbI3稳定性分析 .......................................................................... 16 §4.2 有效利用MAPbI3的几种建议 ......................................................... 17 结论 .................................................................................................................. 18 致 谢 ................................................................................................................ 19 参考文献 ........................................................................................................... 20
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河南科技大学毕业设计（论文）
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