journal article·2020-04-27

Interfacial Chemical Bridge Constructed by Zwitterionic Sulfamic Acid for Efficient and Stable Perovskite Solar Cells

Haoran Xia, Xing Li, Jiyu Zhou, Boxin Wang, Yanmeng Chu, Yanxun Li, Guangbao Wu, Dongyang Zhang, Baoda Xue, Xuning Zhang, Yue Hu, Huiqiong Zhou, Yuan Zhang

ACS Applied Energy Materials· Volume 3· Issue 4
Publisher page

Abstract

A simple-structure zwitterion of sulfamic acid (+H3N–SO3–, SA) is introduced to construct an effective chemical bridge between SnO2 and a perovskite layer through a coordination bond via the -SO3– anion for remedying the oxygen vacancies of SnO2 and meanwhile to passivate charged defects of the perovskite through electrostatic interaction via the -NH3+ cation. The introduced SA results in high-quality perovskite films with large grain size, due to the better wettability for perovskite solution. Consequently, the SA-modified solar cell generates an enhanced efficiency from 18.2% to 20.4% with negligible hysteresis. Remarkably, the unsealed device with SA modification also exhibits considerably improved stability.
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Research context

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Advanced battery technologies research

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

Affiliations

School of Chemistry, Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, People’s Republic of China

School of Materials Science and Engineering, Southwest Petroleum University, Chengdu 610500, Sichuan, People’s Republic of China

CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, People’s Republic of China

Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, Hubei People’s Republic of China

Funding

Ministry of Science and Technology of the People's Republic of China · China Postdoctoral Science Foundation · National Natural Science Foundation of China · Chinese Academy of Sciences

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