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Nano Research 2015, 8(1): 263-270 https://doi.org/10.1007/s12274-014-0662-1
Research Article | Issue | Published: 03 January 2015

Facile preparation of organometallic perovskite films and high-efficiency solar cells using solid-state chemistry

Show Author's Information Lei Chen1,2,§,  Feng Tang2,§,  Yixin Wang2,3,  Shan Gao2,  Weiguo Cao1,  Jinhua Cai2( ),  Liwei Chen2( )
Department of ChemistryShanghai UniversityShanghai200444China
i-LabSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhouJiangsu215123China
Nano Science and Technology InstituteUniversity of Science and Technology of ChinaSuzhouJiangsu215123China

§ These authors contributed equally to this work.

Keywords:
perovskite solar cells, solid-state chemistry, planar heterojunction, flexible substrates
Cite this article:
Chen L, Tang F, Wang Y, et al. Facile preparation of organometallic perovskite films and high-efficiency solar cells using solid-state chemistry. Nano Research, 2015, 8(1): 263-270. https://doi.org/10.1007/s12274-014-0662-1
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Abstract Full text Electronic supplementary material About this article

The power conversion efficiency of organometallic perovskite-based solar cells has skyrocketed in recent years. Intensive efforts have been made to prepare high-quality perovskite films tailored to various device configurations. Planar heterojunction devices have achieved record efficiencies; however, the preparation of perovskite films for planar junction devices requires the use of expensive vacuum facilities and/or the fine control of experimental conditions. Here, we demonstrate a facile preparation of perovskite films using solid-state chemistry. Solid-state precursor thin films of CH3NH3I and PbI2 are brought into contact with each other and allowed to react via thermally accelerated diffusion. The resulting perovskite film displays good optical absorption and a smooth morphology. Solar cells based on these films show an average efficiency of 8.7% and a maximum efficiency of 10%. The solid-state synthesis of organometallic perovskite can also be carried out on flexible plastic substrates. Using this method on a PET/ITO substrate produces devices with an efficiency of 3.2%. Unlike existing synthetic methods for organometallic perovskite films, the solid-state reaction method does not require the use of orthogonal solvents or careful adjustment of reaction conditions, and thus shows good potential for mass production in the future.


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About this article

Facile preparation of organometallic perovskite films and high-efficiency solar cells using solid-state chemistry

Show Author's information Lei Chen1,2,§, Feng Tang2,§, Yixin Wang2,3, Shan Gao2, Weiguo Cao1, Jinhua Cai2( ), Liwei Chen2( )
Department of ChemistryShanghai UniversityShanghai200444China
i-LabSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhouJiangsu215123China
Nano Science and Technology InstituteUniversity of Science and Technology of ChinaSuzhouJiangsu215123China

§ These authors contributed equally to this work.

Abstract

The power conversion efficiency of organometallic perovskite-based solar cells has skyrocketed in recent years. Intensive efforts have been made to prepare high-quality perovskite films tailored to various device configurations. Planar heterojunction devices have achieved record efficiencies; however, the preparation of perovskite films for planar junction devices requires the use of expensive vacuum facilities and/or the fine control of experimental conditions. Here, we demonstrate a facile preparation of perovskite films using solid-state chemistry. Solid-state precursor thin films of CH3NH3I and PbI2 are brought into contact with each other and allowed to react via thermally accelerated diffusion. The resulting perovskite film displays good optical absorption and a smooth morphology. Solar cells based on these films show an average efficiency of 8.7% and a maximum efficiency of 10%. The solid-state synthesis of organometallic perovskite can also be carried out on flexible plastic substrates. Using this method on a PET/ITO substrate produces devices with an efficiency of 3.2%. Unlike existing synthetic methods for organometallic perovskite films, the solid-state reaction method does not require the use of orthogonal solvents or careful adjustment of reaction conditions, and thus shows good potential for mass production in the future.

Keywords: perovskite solar cells, solid-state chemistry, planar heterojunction, flexible substrates

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Publication history
Copyright
Acknowledgements

Publication history

Received: 12 September 2014
Revised: 07 November 2014
Accepted: 30 November 2014
Published: 03 January 2015
Issue date: January 2015

Copyright

© Tsinghua University Press and Springer‐Verlag Berlin Heidelberg 2014

Acknowledgements

Acknowledgements

This work was supported by the National Natural Science Foundation of China (Nos. 91233104, and 61376063), and the National Basic Research Programof China (No. 2010CB934700). L. C. acknowledges the support from Jiangsu Provincial Natural Science Foundation (No. BK20130006).

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