高等学校化学学报 ›› 2018, Vol. 39 ›› Issue (3): 545-551.doi: 10.7503/cjcu20170285

• 物理化学 • 上一篇    下一篇

裂纹缺陷对钙钛矿太阳电池性能的影响

刘国震1,2, 叶加久1,2, 侯昭升3, 陈双宏1, 胡林华1, 潘旭1(), 戴松元4   

  1. 1. 中国科学院合肥物质科学研究院应用技术研究所,中国科学院光伏与节能材料重点实验室, 合肥 230088
    2. 中国科学技术大学研究生院科学岛分院, 合肥 230026
    3. 山东师范大学化学化工与材料科学学院, 济南 250014
    4. 华北电力大学新能源电力系统国家重点实验室, 北京 102206
  • 收稿日期:2017-05-05 出版日期:2018-03-10 发布日期:2018-01-23
  • 作者简介:联系人简介: 潘 旭, 男, 博士, 研究员, 博士生导师, 主要从事钙钛矿太阳电池及电致发光等方面的研究. E-mail:xpan@rntek.cas.cn
  • 基金资助:
    国家高技术研究发展计划项目(批准号: 2015AA050602)、 国家自然科学基金(批准号: 61404142)和中国科学院BIC国际合作局对外合作重点项目(批准号: GJHZ1607)资助

Influence of Crack-defect on Perovskite Solar Cells Performance

LIU Guozhen1,2, YE Jiajiu1,2, HOU Zhaosheng3, CHEN Shuanghong1, HU Linhua1, PAN Xu1,*(), DAI Songyuan4   

  1. 1. Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Applied Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230088, China
    2. Science Island Branch of Graduate School, University of Science and Technology of China, Hefei 230026, China
    3. College of Chemistry, Chemical Engineering and Materials Science,Shandong Normal University, Jinan 250014, China
    4. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University, Beijing 102206, China
  • Received:2017-05-05 Online:2018-03-10 Published:2018-01-23
  • Contact: PAN Xu E-mail:xpan@rntek.cas.cn
  • Supported by:
    † Supported by the National High Technology Research and Development Program of China(No.2015AA050602), the National Natural Science Foundation of China(No.61404142) and the External Cooperation Program of BIC, Chinese Academy of Sciences(No;GJHZ1607)

摘要:

基于一步法制备了(FAPbI3)0.85(MAPbBr3)0.15钙钛矿太阳电池, 通过扫描电子显微镜(SEM)、 X射线衍射(XRD)、 吸收光谱、 瞬态吸收光谱(TA)和稳态荧光光谱(PL)等对钙钛矿薄膜进行了测试. 结果表明, 当吸光层薄膜表面有裂纹缺陷存在时, 钙钛矿结晶性差, 表面覆盖度降低, 进而使薄膜吸收减弱, 薄膜内部激发态电子与空穴复合几率增加, 严重影响器件的光伏性能, 光电转化效率(PCE) 仅为15.74%; 当吸光层薄膜表面无裂纹存在时, 太阳电池的PCE最高可以达到18.22%.

关键词: 钙钛矿太阳电池, 裂纹缺陷, 光伏性能

Abstract:

The influences of crack-defect on the quality of perovskite light absorber and the photovoltaic performance of (FAPbI3)0.85(MAPbBr3)0.15 perovskite solar cells(PSC) were investigated. The scanning electron microscopy, X-ray diffraction, UV-Vis absorption and transient absorption, static photoluminescence spectroscopies were carried out to study the differences in the devices with and without crack-defect. The experimental results show that, when there are obvious cracks on the surface, the films have worse crystallinity and weaker absorption, which could lead to the decrease of carrier extraction efficiency and increase of internal electron-hole recombination. As a result, the power conversion efficiency(PCE) of PSC with crack-defect is only 15.74%, while that of PSC without crack-defect show the highest PCE of 18.22%. Therefore, acquiring high quality of pe-rovskite thin film without crack-defect can reduce internal electron-hole recombination, improve carrier extraction efficiency and be beneficial to further enhance the photovoltaic performance of perovskite solar cells.

Key words: Perovskite solar cell, Crack-defect, Photovoltaic performance

中图分类号: