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Benzodithiophene derivative 2D spacer as a defect passivation material in metal halide perovskite solar cells

  • Original Paper - Condensed Matter
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An Erratum to this article was published on 09 August 2023

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Abstract

Defect passivation is an efficient strategy for improving the performance of perovskite solar cells (PSCs). In this study, we introduced a benzodithiophene-based 2D spacer with a short alkyl chain (BDT-C2) into a perovskite film for defect passivation. The introduction of BDT-C2 did not exhibit the 2D perovskite structure, but an optimized amount (0.01 wt%) induced vertically oriented (110) planes of perovskite film. However, when excess BDT-C2 was added to the perovskite film, the orientation collapsed. The nanostructure of the film was correlated with the device performance. The (110) plane was mostly arranged in the vertical orientation, and the device performance was best under the optimal conditions. Despite the enhancement of the device performance, the grain size of the perovskite was almost unaltered with the addition of BDT-C2. By measuring the light intensity-dependent Voc and Jsc, we confirmed that there was reduced charge recombination owing to defect passivation under the optimal conditions.

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Acknowledgements

This research was supported by 2021 BK21 FOUR Program of Pusan National University. This research was also supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Korean Government (NRF-2021R1A2C2010179), and the Korea Electric Power Corporation (R21EA07).

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Authors and Affiliations

  1. School of Chemical Engineering, Pusan National University, Busan, 46241, Republic of Korea

    Seungyeon Hong, Sung Hun Lee, Kyungmin Lee & Hyo Jung Kim

  2. Institute of Advanced Organic Materials, Pusan National University, 2, Busandaehak-Ro 63Boen-Gil,Geumjeong-Gu, Busan, 46241, Korea

    Seungyeon Hong, Sung Hun Lee, Kyungmin Lee, Jun-Ho Yum, Ji-Youn Seo & Hyo Jung Kim

  3. Laboratory for Molecular Engineering of Optoelectronic Nanomaterials École Polytechnique Fédéralede Lausanne (EPFL) Station 6, 1015, Lausanne, Switzerland

    Jun-Ho Yum

  4. Department of Nano Fusion Technology, Pusan National University, Busan, Korea

    Ji-Youn Seo

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  1. Seungyeon Hong
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Correspondence to Hyo Jung Kim.

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Hong, S., Lee, S.H., Lee, K. et al. Benzodithiophene derivative 2D spacer as a defect passivation material in metal halide perovskite solar cells. J. Korean Phys. Soc. 83, 269–275 (2023). https://doi.org/10.1007/s40042-023-00759-0

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