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High Performance Perovskite Solar Cells by Perovskites Co-Crystallized with Polymers

38 Pages Posted: 17 Apr 2020 Publication Status: Review Complete

See all articles by Luyao Zheng

Luyao Zheng

University of Akron - College of Polymer Science and Polymer Engineering

Kai Wang

University of Akron - College of Polymer Science and Polymer Engineering

Tao Zhu

University of Akron - College of Polymer Science and Polymer Engineering

Yongrui Yang

University of Akron - College of Polymer Science and Polymer Engineering

Kai Gu

University of Akron - College of Polymer Science and Polymer Engineering

Chunming Liu

University of Akron - College of Polymer Science and Polymer Engineering

Xiong Gong

University of Akron - College of Polymer Science and Polymer Engineering

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Abstract

Extensive interest has been raised by perovskite materials as emerging alternatives for low-cost and efficient perovskite solar cells (PSCs) in the past decade. However, achieving high-performance and stable PSCs with negligible photocurrent hysteresis behavior is still a challenging task due to the intrinsic foibles of perovskites. In this work, we report efficient and stable PSCs with dramatically suppressed photocurrent hysteresis by CH3NH3PbI3 co-crystallized with poly(ethylene oxide) (PEO). It is found that PEO-CH3NH3PbI3 thin film exhibit superior film morphology and significantly enlarged crystal grains as compared with CH3NH3PbI3 thin film. Systematical investigations reveal that the introduction of PEO in CH3NH3PbI3 could improve the charge transport and reduce the charge carrier recombination and promote the charge carrier extraction time within PSCs. As a result, PSCs by PEO-CH3NH3PbI3 thin film exhibit a power convention efficiency of 20.73%, which is over 20% enhancement as compared with that (17.42%) from PSCs by CH3NH3PbI3 thin film. Moreover, photocurrent hysteresis is dramatically suppressed in PSCs by PEO-CH3NH3PbI3 thin film. In addition, PSCs by PEO-CH3NH3PbI3 thin film exhibit boosted stability. All these results demonstrate that perovskites co-crystallized with polymers is an efficient approach towards high performance PSCs.

Keywords: hybrid perovskites, self-assembly, co-crystallization, poly(ethylene oxide), photocurrent hysteresis, power conversion efficiency and stability

Suggested Citation

Zheng, Luyao and Wang, Kai and Zhu, Tao and Yang, Yongrui and Gu, Kai and Liu, Chunming and Gong, Xiong, High Performance Perovskite Solar Cells by Perovskites Co-Crystallized with Polymers. Available at SSRN: https://ssrn.com/abstract=3569542 or http://dx.doi.org/10.2139/ssrn.3569542
This is a paper under consideration at Cell Press and has not been peer-reviewed.

Luyao Zheng

University of Akron - College of Polymer Science and Polymer Engineering

Akron, OH
United States

Kai Wang

University of Akron - College of Polymer Science and Polymer Engineering

Akron, OH
United States

Tao Zhu

University of Akron - College of Polymer Science and Polymer Engineering

Akron, OH
United States

Yongrui Yang

University of Akron - College of Polymer Science and Polymer Engineering ( email )

Akron, OH
United States

Kai Gu

University of Akron - College of Polymer Science and Polymer Engineering

Akron, OH
United States

Chunming Liu

University of Akron - College of Polymer Science and Polymer Engineering

Akron, OH
United States

Xiong Gong (Contact Author)

University of Akron - College of Polymer Science and Polymer Engineering ( email )

Akron, OH
United States

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