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THE ROLE OF Br AS DOPANT ON THE STRUCTURAL AND CHARGE TRANSPORT PROPERTIES IN CH3NH3PbI3−x−yBrxCly MIXED-HALIDE PEROVSKITE FOR HYBRID SOLAR CELLS

Author

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  • JINFENG WANG

    (School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, P. R. China)

  • BENGUANG ZHAO

    (School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, P. R. China)

  • LEI ZHU

    (School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, P. R. China)

  • JIAN SONG

    (School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, P. R. China)

Abstract

A series of CH3NH3PbI3−x−yBrxCly mixed-halide perovskite were fabricated as light harvesters for organic–inorganic planar heterojunction perovskite solar cells (PSCs). This paper aimed at investigating the morphology and structural properties of Br doped mixed-halide perovskites and the influence on the corresponding photovoltaic performances. We found that Br incorporation in an I/Cl-based structure dramatically improved the charge transport within the perovskite layer. The average efficiency of the planar device was 13.6% with a minimal standard deviation of ± 1.53% and best efficiency as high as 15.13% was achieved. Moreover, the device showed superior stability over 20 days with little degradation <9% when stored under ambient conditions, indicating the outstanding performances of planar heterojunction solar cells based on this material. The results highlight the crucial role of the Br doping on the performance of the PSCs and pave the way for further progress on this field.

Suggested Citation

  • Jinfeng Wang & Benguang Zhao & Lei Zhu & Jian Song, 2019. "THE ROLE OF Br AS DOPANT ON THE STRUCTURAL AND CHARGE TRANSPORT PROPERTIES IN CH3NH3PbI3−x−yBrxCly MIXED-HALIDE PEROVSKITE FOR HYBRID SOLAR CELLS," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 26(02), pages 1-10, February.
    • Handle: RePEc:wsi:srlxxx:v:26:y:2019:i:02:n:s0218625x18501378
    DOI: 10.1142/S0218625X18501378
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