Facile preparation of organometallic perovskite films and high-efficiency solar cells using solid-state chemistry
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- 作者：Lei Chen (1) (2)
Feng Tang (2)
Yixin Wang (2) (3)
Shan Gao (2)
Weiguo Cao (1)
Jinhua Cai (2)
Liwei Chen (2)
1. Department of Chemistry ; Shanghai University ; Shanghai ; 200444 ; China
2. i-Lab ; Suzhou Institute of Nano-Tech and Nano-Bionics ; Chinese Academy of Sciences ; Suzhou ; Jiangsu ; 215123 ; China
3. Nano Science and Technology Institute ; University of Science and Technology of China ; Suzhou ; Jiangsu ; 215123 ; China - 关键词：solid ; state chemistry ; perovskite solar cells ; planar heterojunction ; flexible substrates
- 刊名：Nano Research
- 出版年：2015
- 出版时间：January 2015
- 年：2015
- 卷：8
- 期：1
- 页码：263-270
- 全文大小：2,107 KB
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- 刊物主题：Chinese Library of Science
Chemistry
Nanotechnology - 出版者：Tsinghua University Press, co-published with Springer-Verlag GmbH
- ISSN：1998-0000
文摘
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.