影像科学与光化学2017，Vol.35Issue(5)：749-757,9.DOI:10.7517/j.issn.1674-0475.2017.04.035
压强对钙钛矿薄膜形貌和结晶性影响的研究
Effect of Pressure on Morphology and Crystallinity of the Perovskite Thin Film
摘要
Abstract
A novel and simple method to control the crystallization process during the formation of perovskite thin films is critical for optimizing the device fabrication process and constructing high efficiency perovskite solar cells.In this article,a method of adjusting the vacuum was used to effectively control the crystallization process.Furthermore,the role of pressure and its influence upon perovskite crystal growth,film formation and device performance were systematically investigated.The crystallinity and morphology of the perovskite thin film were characterized by scanning electron microscope (SEM),ultraviolet-visible absorption spectra (UV-Vis) and X-ray diffraction (XRD).Based on the structure of Glass/ITO/PEDOT:PSS/CH3NH3PbI3/PCBM/ A1,the performance of the device corresponding to the different pressure was studied.The results indicate that the decreased pressure can enhance the crystallinity of the perovskite film obviously,and improve the surface coverage by reducing the amount of holes.At the same time,the short circuit current,filling factor and photoelectric conversion efficiency of the device are all improved with the pressure decreasing.A 19％ higher power conversion efficiency of 12.36％ was achieved in comparison to the device fabricated by traditional method,which exhibited just 10.38％ efficiency.关键词
调节真空度/压强/孔洞/钙钛矿太阳能电池Key words
vacuum tuning/pressure/hole/perovskite solar cells引用本文复制引用
孔祥彬,陈永振,李志毅,刘彦伟,魏晓芳,刘建君,王瑞芳,王鹰..压强对钙钛矿薄膜形貌和结晶性影响的研究[J].影像科学与光化学,2017,35(5):749-757,9.基金项目
国家自然科学基金(61420106002,51373189)、中国科学院百人计划和国家重点研究发展项目(2016YFB0401004)资助 （61420106002,51373189）
