DataVXAdvanced Energy MaterialsPaper
journal article·2018-08Open access

Stable Formamidinium‐Based Perovskite Solar Cells via In Situ Grain Encapsulation

Tanghao Liu, Yuanyuan Zhou, Zhen Li, Lin Zhang, Ming‐Gang Ju, Deying Luo, Ye Yang, Mengjin Yang, Dong Hoe Kim, Wenqiang Yang, Nitin P. Padture, Matthew C. Beard, Xiao Cheng Zeng, Kai Zhu, Qihuang Gong, Rui Zhu

Advanced Energy Materials· Volume 8· Issue 22
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Source abstract

Abstract

Abstract Formamidinium (FA)‐based lead iodide perovskites have emerged as the most promising light‐absorber materials in the prevailing perovskite solar cells (PSCs). However, they suffer from the phase‐instability issue in the ambient atmosphere, which is holding back the realization of the full potential of FA‐based PSCs in the context of high efficiency and stability. Herein, the tetraethylorthosilicate hydrolysis process is integrated with the solution crystallization of FA‐based perovskites, forming a new film structure with individual perovskite grains encapsulated by amorphous silica layers that are in situ formed at the nanoscale. The silica not only protects perovskite grains from the degradation but also enhances the charge‐carrier dynamics of perovskite films. The underlying mechanism is discussed using a joint experiment‐theory approach. Through this in situ grain encapsulation method, PSCs show an efficiency close to 20% with an impressive 97% retention after 1000‐h storage under ambient conditions.
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Research context

NanomaterialsElectronic materials

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory for Artificial Microstructure and Mesoscopic Physics Department of Physics Peking University Beijing 100871 China

School of Engineering Brown University Providence RI 02912 USA

Chemistry and Nanoscience Center National Renewable Energy Laboratory Golden CO 80401 USA

Center for Nano Energy Materials Northwestern Polytechnical University Xi'an 710072 China

Department of Chemistry University of Nebraska‐Lincoln Lincoln NE 68588 USA

Collaborative Innovation Center of Quantum Matter Beijing 100871 China

Collaborative Innovation Center of Extreme Optics Shanxi University Taiyuan Shanxi 030006 China

Funding

National Natural Science Foundation of China · National Science Foundation · Office of Naval Research · National Renewable Energy Laboratory · U.S. Department of Energy · Office of Energy Efficiency and Renewable Energy · Solar Energy Technologies Office

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