Finely Interpenetrating Bulk Heterojunction Structure for Lead Sulfide Colloidal Quantum Dot Solar Cells by Convective Assembly

DOI Web Site 9 Citations 45 References
  • Guozheng Shi
    Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, China
  • Anusit Kaewprajak
    Graduate School of Energy Science, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-8501, Japan
  • Xufeng Ling
    Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, China
  • Akinobu Hayakawa
    Graduate School of Energy Science, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-8501, Japan
  • Sijie Zhou
    Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, China
  • Bin Song
    Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, China
  • YangWon Kang
    Graduate School of Energy Science, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-8501, Japan
  • Takahiro Hayashi
    Graduate School of Energy Science, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-8501, Japan
  • Mutlu Ege Altun
    Graduate School of Energy Science, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-8501, Japan
  • Masahiro Nakaya
    Graduate School of Energy Science, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-8501, Japan
  • Zeke Liu
    Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, China
  • Haibin Wang
    Research Center for Advanced Science and Technology, The University of Tokyo, 153-8904 Tokyo, Japan
  • Takashi Sagawa
    Graduate School of Energy Science, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-8501, Japan
  • Wanli Ma
    Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, China

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Description

Lead chalcogenides colloidal quantum dot (PbS CQD) solar cells employing an ordered bulk heterojunction (OBHJ) structure allow sufficient utilization of solar energy and at the same time ensure efficient charge extractions. However, the interfacial deficiency was determined to be a significant limiting factor for the further improvement of efficiency. Herein, a finely interpenetrating OBHJ structure between zinc oxide nanowire (ZnO NW) arrays and PbS CQDs was achieved by simultaneously controlling the growth orientation of ZnO NWs and introducing convective assembly as the CQD deposition technique. The inherent directionality during the assembly process leads to dense packing and efficient infiltration of CQDs, forming a valid OBHJ structure. Additionally, a self-assembled monolayer was introduced to further improve the Voc deficit. As a result, a record PCE of 9.92% has been demonstrated for OBHJ structured CQD solar cells that are compatible with low-temperature and scalable manufacturing processes.

Journal

  • ACS Energy Letters

    ACS Energy Letters 4 (4), 960-967, 2019-03-26

    American Chemical Society (ACS)

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