• Journal of Inorganic Materials
  • Vol. 39, Issue 12, 1397 (2024)
Suolan LIU1,2, Fuyuan LUAN1,3, Zihua WU3,4, Chunhui SHOU5..., Huaqing XIE3,4 and Songwang YANG1,2,*|Show fewer author(s)
Author Affiliations
  • 11. CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China
  • 22. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  • 33. School of Energy and Materials, Shanghai Polytechnic University, Shanghai 201209, China
  • 44. Shanghai Engineering Research Center of Advanced Thermal Functional Materials, Shanghai 201209, China
  • 55. Zhejiang Baima Lake Laboratory Co. Ltd., Hangzhou 310000, China
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    DOI: 10.15541/jim20240202 Cite this Article
    Suolan LIU, Fuyuan LUAN, Zihua WU, Chunhui SHOU, Huaqing XIE, Songwang YANG. In-situ Growth of Conformal SnO2 Layers for Efficient Perovskite Solar Cells [J]. Journal of Inorganic Materials, 2024, 39(12): 1397 Copy Citation Text show less

    Abstract

    Significant progress has recently been made in enhancing the power conversion efficiency (PCE) of perovskite solar cells (PSCs). The electron transport layer (ETL), as an essential component of PSCs, significantly influences the performance of devices. Traditional spin-coating method for preparing the ETL fails to fully cover the cusp of FTO transparent conductive glass substrate, leading to direct contact between perovskite film and FTO substrate, which induces charge recombination and reduces the performance of PSCs. To address this issue, an in-situ growth method was proposed to prepare conformal SnO2 films on FTO glass substrates in this study. The resulting SnO2 films are not only dense and uniform, fully covering the cusp of the FTO glass substrates and reducing the contact area between the FTO substrates and the perovskite films, but also facilitating the formation of perovskite films with large grain sizes. Moreover, the conformal SnO2 films can improve the charge extraction at the SnO2/perovskite interface, reduce the trap density and trap-assisted recombination in PSCs, and thus enhance the PCE of PSCs. Through comparative experiments, it is found that the PSCs with in-situ grown SnO2 films show an improved PCE of 21.97%, which significantly increased compared to that with spin-coated SnO2 films (20.93%). All above data demonstrate that the as-prepared SnO2 film can serve as an ideal ETL. It is worth mentioning that this method avoids the use of corrosive hydrochloric acid and toxic thioglycolic acid, and it can also be extended to ITO flexible transparent conductive substrates in the future.
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    Suolan LIU, Fuyuan LUAN, Zihua WU, Chunhui SHOU, Huaqing XIE, Songwang YANG. In-situ Growth of Conformal SnO2 Layers for Efficient Perovskite Solar Cells [J]. Journal of Inorganic Materials, 2024, 39(12): 1397
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