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Enhanced electronic properties in mesoporous TiO2 via lithium doping for high-efficiency perovskite solar cells

Author

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  • Fabrizio Giordano

    (Laboratory of Photonics and Interfaces, Institute of Chemical Sciences and Engineering, School of Basic Sciences, Ecole Polytechnique Fédérale de Lausanne (EPFL))

  • Antonio Abate

    (Laboratory of Photonics and Interfaces, Institute of Chemical Sciences and Engineering, School of Basic Sciences, Ecole Polytechnique Fédérale de Lausanne (EPFL))

  • Juan Pablo Correa Baena

    (Laboratoire des sciences photomoléculaires, Institute of Chemical Sciences and Engineering, School of Basic Sciences, Ecole Polytechnique Fédérale de Lausanne (EPFL))

  • Michael Saliba

    (Group for Molecular Engineering of Functional Materials, Institute of Chemical Sciences and Engineering, School of Basic Sciences, Ecole Polytechnique Fédérale de Lausanne (EPFL))

  • Taisuke Matsui

    (Materials Research Laboratory, Panasonic Corporation)

  • Sang Hyuk Im

    (Kyung Hee University)

  • Shaik M. Zakeeruddin

    (Laboratory of Photonics and Interfaces, Institute of Chemical Sciences and Engineering, School of Basic Sciences, Ecole Polytechnique Fédérale de Lausanne (EPFL))

  • Mohammad Khaja Nazeeruddin

    (Group for Molecular Engineering of Functional Materials, Institute of Chemical Sciences and Engineering, School of Basic Sciences, Ecole Polytechnique Fédérale de Lausanne (EPFL))

  • Anders Hagfeldt

    (Laboratoire des sciences photomoléculaires, Institute of Chemical Sciences and Engineering, School of Basic Sciences, Ecole Polytechnique Fédérale de Lausanne (EPFL))

  • Michael Graetzel

    (Laboratory of Photonics and Interfaces, Institute of Chemical Sciences and Engineering, School of Basic Sciences, Ecole Polytechnique Fédérale de Lausanne (EPFL))

Abstract

Perovskite solar cells are one of the most promising photovoltaic technologies with their extraordinary progress in efficiency and the simple processes required to produce them. However, the frequent presence of a pronounced hysteresis in the current voltage characteristic of these devices arises concerns on the intrinsic stability of organo-metal halides, challenging the reliability of technology itself. Here, we show that n-doping of mesoporous TiO2 is accomplished by facile post treatment of the films with lithium salts. We demonstrate that the Li-doped TiO2 electrodes exhibit superior electronic properties, by reducing electronic trap states enabling faster electron transport. Perovskite solar cells prepared using the Li-doped films as scaffold to host the CH3NH3PbI3 light harvester produce substantially higher performances compared with undoped electrodes, improving the power conversion efficiency from 17 to over 19% with negligible hysteretic behaviour (lower than 0.3%).

Suggested Citation

  • Fabrizio Giordano & Antonio Abate & Juan Pablo Correa Baena & Michael Saliba & Taisuke Matsui & Sang Hyuk Im & Shaik M. Zakeeruddin & Mohammad Khaja Nazeeruddin & Anders Hagfeldt & Michael Graetzel, 2016. "Enhanced electronic properties in mesoporous TiO2 via lithium doping for high-efficiency perovskite solar cells," Nature Communications, Nature, vol. 7(1), pages 1-6, April.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms10379
    DOI: 10.1038/ncomms10379
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    Cited by:

    1. Salah, Mostafa M. & Saeed, Ahmed & Mousa, Mohamed & Abouelatta, Mohamed & Zekry, A. & Shaker, Ahmed & Amer, Fathy Z. & Mubarak, Roaa I., 2024. "Numerical analysis of carbon-based perovskite tandem solar cells: Pathways towards high efficiency and stability," Renewable and Sustainable Energy Reviews, Elsevier, vol. 189(PB).
    2. Sajid, Sajid & Huang, Hao & Ji, Jun & Jiang, Haoran & Duan, Mingjun & Liu, Xin & Liu, Benyu & Li, Meicheng, 2021. "Quest for robust electron transporting materials towards efficient, hysteresis-free and stable perovskite solar cells," Renewable and Sustainable Energy Reviews, Elsevier, vol. 152(C).
    3. Yanxun Li & Bo Huang & Xuning Zhang & Jianwei Ding & Yingyu Zhang & Linge Xiao & Boxin Wang & Qian Cheng & Gaosheng Huang & Hong Zhang & Yingguo Yang & Xiaoying Qi & Qiang Zheng & Yuan Zhang & Xiaohui, 2023. "Lifetime over 10000 hours for organic solar cells with Ir/IrOx electron-transporting layer," Nature Communications, Nature, vol. 14(1), pages 1-10, December.

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