能源化学(英文版) ›› 2019, Vol. 38 ›› Issue (11): 192-198.DOI: 10.1016/j.jechem.2019.03.033

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The fabrication of homogeneous perovskite films on non-wetting interfaces enabled by physical modification

Jiang Youa,b, Fei Guob, Shudi Qiub, Wenxin Heb, Chuan Wangc, Xianhu Liuc, Weijian Xua, Yaohua Maib   

  1. a State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, Hunan, China;
    b Institute of New Energy Technology, College of Information Science and Technology, Jinan University, Guangzhou 510632, Guangdong, China;
    c National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou 450002, Henan, China
  • 收稿日期:2019-02-28 修回日期:2019-03-26 出版日期:2019-11-15 发布日期:2020-12-18
  • 通讯作者: Fei Guo, fei.guo@jnu.edu.cn; Weijian Xu, weijxu@hnu.edu.cn; Yaohua Mai, yaohuamai@jnu.edu.cn
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (Nos. 51772193, 51702063), Nature Science Fund of Liaoning Province (No. 20180550200), China Postdoctoral Science Foundation (2018M630340) and Project of Science and Technology Plan Shenyang (No. 17-231-1-18).

The fabrication of homogeneous perovskite films on non-wetting interfaces enabled by physical modification

Jiang Youa,b, Fei Guob, Shudi Qiub, Wenxin Heb, Chuan Wangc, Xianhu Liuc, Weijian Xua, Yaohua Maib   

  1. a State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, Hunan, China;
    b Institute of New Energy Technology, College of Information Science and Technology, Jinan University, Guangzhou 510632, Guangdong, China;
    c National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou 450002, Henan, China
  • Received:2019-02-28 Revised:2019-03-26 Online:2019-11-15 Published:2020-12-18
  • Contact: Fei Guo, fei.guo@jnu.edu.cn; Weijian Xu, weijxu@hnu.edu.cn; Yaohua Mai, yaohuamai@jnu.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Nos. 51772193, 51702063), Nature Science Fund of Liaoning Province (No. 20180550200), China Postdoctoral Science Foundation (2018M630340) and Project of Science and Technology Plan Shenyang (No. 17-231-1-18).

摘要: Conjugated polymers are commonly used as effective hole transport materials (HTMs) for preparation of high-performance perovskite solar cells. However, the hydrophobic nature of these materials renders it difficult to deposit photovoltaic perovskite layers on top via solution processing. In this article, we report a generic surface modification strategy that enables the deposition of uniform and dense perovskite films on top of non-wetting interfaces. In contrast to the previous proposed chemical modifications which might alter the optoelectronic properties of the interfacial layers, we realized a nondestructive surface modification enabled by introducing a layer of insulating mesoporous aluminum oxide (Al2O3). The surface energies of the typical non-wetting hole-transport layers (PTAA, P3HT, and Poly-TPD) were significantly reduced by the Al2O3 modification. Benefiting from the intact optoelectronic properties of the HTMs, perovskite solar cells deposited on these interface materials show full open-circuit voltages (VOC) with high fill factors (FF) up to 80%. Our method provides an effective avenue for exploiting the full potential of the existing as well as newly developed non-wetting interface materials for the fabrication of high-performance inverted perovskite solar cells.

关键词: Perovskite, Non-wetting, Hole-transport materials, Surface modification, Aluminum oxide

Abstract: Conjugated polymers are commonly used as effective hole transport materials (HTMs) for preparation of high-performance perovskite solar cells. However, the hydrophobic nature of these materials renders it difficult to deposit photovoltaic perovskite layers on top via solution processing. In this article, we report a generic surface modification strategy that enables the deposition of uniform and dense perovskite films on top of non-wetting interfaces. In contrast to the previous proposed chemical modifications which might alter the optoelectronic properties of the interfacial layers, we realized a nondestructive surface modification enabled by introducing a layer of insulating mesoporous aluminum oxide (Al2O3). The surface energies of the typical non-wetting hole-transport layers (PTAA, P3HT, and Poly-TPD) were significantly reduced by the Al2O3 modification. Benefiting from the intact optoelectronic properties of the HTMs, perovskite solar cells deposited on these interface materials show full open-circuit voltages (VOC) with high fill factors (FF) up to 80%. Our method provides an effective avenue for exploiting the full potential of the existing as well as newly developed non-wetting interface materials for the fabrication of high-performance inverted perovskite solar cells.

Key words: Perovskite, Non-wetting, Hole-transport materials, Surface modification, Aluminum oxide