化工新型材料

化工新型材料 ›› 2018, Vol. 46 ›› Issue (2) : 155-159.

科学研究

CH₃NH₃PbI₂Br光吸收层薄膜的制备

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Preparation of CH₃NH₃PbI₂Br light absorber-layer thin film

Li Chunjing, Yang Ruixia, Ma Hao, Jin Huijiao, Shi Xiaodong, Ma Wenjing

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Received
2016-10-17
Issue Date	Revised Date
2018-03-13	2016-10-17

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摘要

采用一步法在大气环境下制备连续的CH₃NH₃PbI₂Br钙钛矿薄膜。通过在标准前驱液[甲基溴化铵(CH₃NH₃Br)、碘化铅(PbI₂)的二甲基甲酰胺(DMF)溶液]中添加甲基氯化铵(CH₃NH₃Cl)制备出了连续覆盖率高的CH₃NH₃PbI₂Br钙钛矿薄膜,并探究了退火温度对薄膜晶化过程、微结构及光吸收特性的影响。结果表明:CH₃NH₃Cl的添加大大影响了CH₃NH₃PbI₂Br钙钛矿薄膜的结晶过程,改善了薄膜连续性和光吸收特性。X射线衍射谱图表明,添加剂CH₃NH₃Cl对形成的钙钛矿薄膜成分没有影响。当退火温度为100℃时,薄膜的生长特性较好,薄膜较为致密连续,光吸收特性最好,且退火温度不影响其禁带宽度的变化,有利于其在晶硅叠层太阳能电池中的应用。

Abstract

The continuous CH₃NH₃PbI₂Br perovskite thin film was prepared by one step method in the atmosphere.By adding CH₃NH₃Cl to standard precursor solution (DMF solution of PbI₂ and CH₃NH₃Br),CH₃NH₃PbI₂Br perovskite thin film with continuous and high coverage rate was prepared,and the effect of thermal annealing temperature on crystallization process,microstructure and optical properties of film were explored.The results indicated that the addition of CH₃NH₃Cl greatly affected the crystallization process of CH₃NH₃PbI₂Br perovskite,which improved the continuity and optical absorption properties of film.What's more,XRD patterns also showed that the additive CH₃NH₃Cl had no effect on the composition of film by formed.When annealing temperature was 100℃,the film growth was comparably good,the film were of good compactness,continuous and absorption properties.In addition,the annealing temperature did not affect the changes in the band gap,and it was beneficial to its application in the crystalline silicon tandem solar cells.

关键词

大气 / CH₃NH₃Cl / CH₃NH₃PbI₂Br钙钛矿 / 退火温度 / 形貌 / 结晶特性 / 光吸收特性

Key words

atmosphere / CH₃NH₃Cl / CH₃NH₃PbI₂Br perovskite / annealing temperature / morphology / crystallization / light absorption characteristics

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CH₃NH₃PbI₂Br光吸收层薄膜的制备[J]. 化工新型材料, 2018, 46(2): 155-159 DOI:

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