DataVXACS Applied Materials & InterfacesPaper
journal article·2022-03-09

Internal Interactions between Mixed Bulky Organic Cations on Passivating Defects in Perovskite Solar Cells

Yuhui Ma, Ling Zhang, Yao Xu, Ruiyuan Hu, Wei Liu, Ming Du, Liang Chu, Jian Zhang, Xing’ao Li, Ruidong Xia, Wei Huang

ACS Applied Materials & Interfaces· Volume 14· Issue 9
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Source abstract

Abstract

In perovskite solar cells (PSCs), bulky organic cation halide salt additions play a significant role in suppressing nonradiative recombination by passivating intrinsic defects in perovskites. Herein, a passivation treatment is developed by applying mixed bulky cations [guanidinium cation (GA+) and phenylethylammonium cations (PEA+)] as the additive for perovskite thin films. The internal interactions between the two bulky cations could result in lower carrier trap-state densities, a sharper Urbach tail, and better carrier transport in perovskite films in comparison with a control film. As a result, in comparison to the control device, which has a power conversion efficiency (PCE) of 18.92%, the mixed-cation-based device exhibits a dramatic enhancement of PCE of 20.64%. Importantly, after 720 h of storage in an ambient atmosphere with a relative humidity (RH) of 60–80% at room temperature, the mixed-cation-based device retains 62.7% of its original performance, whereas the control devices decay to less than 40% of their original performance.
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Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Organic and Molecular Conductors Research

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

Affiliations

School of Materials Science and Engineering, Key Laboratory for Organic Electronics and Information Displays, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210023, China

School of Science, New Energy Technology Engineering Laboratory of Jiangsu Province, Nanjing University of Posts and Telecommunications, Nanjing 210023, China

Shaanxi Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi’an 710072, Shaanxi, China

Funding

Ministry of Education of the People's Republic of China · China Postdoctoral Science Foundation · Government of Jiangsu Province · Nanjing University of Posts and Telecommunications · National Natural Science Foundation of China · Priority Academic Program Development of Jiangsu Higher Education Institutions

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