Phase Pure 2D Perovskite for High‐Performance 2D–3D Heterostructured Perovskite Solar Cells

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  • Pengwei Li
    Key Laboratory of Green Printing CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences (ICCAS) Beijing Engineering Research Center of Nanomaterials for Green Printing Technology National Laboratory for Molecular Sciences (BNLMS) Beijing 100190 P. R. China
  • Yiqiang Zhang
    State Centre for International Cooperation on Designer Low‐Carbon and Environmental Material (SCICDLCEM) School of Materials Science and Engineering ZhengZhou University ZhengZhou 450001 P. R. China
  • Chao Liang
    Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials Engineering University of Macau Avenida da Universidade Taipa Macau 999078 P. R. China
  • Guichuan Xing
    Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials Engineering University of Macau Avenida da Universidade Taipa Macau 999078 P. R. China
  • Xiaolong Liu
    University of Chinese Academy of Sciences Beijing 100049 P. R. China
  • Fengyu Li
    Key Laboratory of Green Printing CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences (ICCAS) Beijing Engineering Research Center of Nanomaterials for Green Printing Technology National Laboratory for Molecular Sciences (BNLMS) Beijing 100190 P. R. China
  • Xiaotao Liu
    State Centre for International Cooperation on Designer Low‐Carbon and Environmental Material (SCICDLCEM) School of Materials Science and Engineering ZhengZhou University ZhengZhou 450001 P. R. China
  • Xiaotian Hu
    Key Laboratory of Green Printing CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences (ICCAS) Beijing Engineering Research Center of Nanomaterials for Green Printing Technology National Laboratory for Molecular Sciences (BNLMS) Beijing 100190 P. R. China
  • Guosheng Shao
    State Centre for International Cooperation on Designer Low‐Carbon and Environmental Material (SCICDLCEM) School of Materials Science and Engineering ZhengZhou University ZhengZhou 450001 P. R. China
  • Yanlin Song
    Key Laboratory of Green Printing CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences (ICCAS) Beijing Engineering Research Center of Nanomaterials for Green Printing Technology National Laboratory for Molecular Sciences (BNLMS) Beijing 100190 P. R. China

書誌事項

公開日
2018-11-02
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1002/adma.201805323
公開者
Wiley

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説明

<jats:title>Abstract</jats:title><jats:p>Three‐dimensional (3D) metal‐halide perovskite solar cells (PSCs) have demonstrated exceptional high efficiency. However, instability of the 3D perovskite is the main challenge for industrialization. Incorporation of some long organic cations into perovskite crystal to terminate the lattice, and function as moisture and oxygen passivation layer and ion migration blocking layer, is proven to be an effective method to enhance the perovskite stability. Unfortunately, this method typically sacrifices charge‐carrier extraction efficiency of the perovskites. Even in 2D–3D vertically aligned heterostructures, a spread of bandgaps in the 2D due to varying degrees of quantum confinement also results in charge‐carrier localization and carrier mobility reduction. A trade‐off between the power conversion efficiency and stability is made. Here, by introducing 2D C<jats:sub>6</jats:sub>H<jats:sub>18</jats:sub>N<jats:sub>2</jats:sub>O<jats:sub>2</jats:sub>PbI<jats:sub>4</jats:sub> (EDBEPbI<jats:sub>4</jats:sub>) microcrystals into the precursor solution, the grain boundaries of the deposited 3D perovskite film are vertically passivated with phase pure 2D perovskite. The phases pure (inorganic layer number <jats:italic>n</jats:italic> = 1) 2D perovskite can minimize photogenerated charge‐carrier localization in the low‐dimensional perovskite. The dominant vertical alignment does not affect charge‐carrier extraction. Therefore, high‐efficiency (21.06%) and ultrastable (retain 90% of the initial efficiency after 3000 h in air) planar PSCs are demonstrated with these 2D–3D mixtures.</jats:p>

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