journal article·2024-03-08

Unifying Crystal Growth and Defect Passivation in Photovoltaic Perovskites: The Impact of Molecular Coordinating Strength

Fazheng Qiu, Haoliang Cheng, Peng Mao, Weihui Bi, Shen Xing, Bing Wang, Yufei Zhong

ACS Energy Letters· Volume 9· Issue 3
Publisher page

Abstract

Perovskite solar cells (PSCs) are attractive due to their fast-increasing device efficiency, yet their further improvement is limited by their suboptimal morphology and intrinsic defects. To assess how the widely used additive engineering impacts crystal growth and defect passivation, we herein propose a simple but effective strategy to disentangle the influence of molecular coordinating strength on the above factors, respectively. By fine-tuning a single halide atom on the additive molecule, we can transform the functional role of the additive from only a normal passivator into a passivator plus crystal-growth modifier, rendered by the tailored competition between the precursor–solvent and precursor–additive interactions. Thus, optimized PSCs leveraged by the above strategy deliver a PCE of over 24% with improved stability. The unified crystal growth and defect passivation under the impact of molecular coordinating strength here provides new insights into designing additive molecules of interest to further push the envelope of PSCs’ efficiency.
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Research context

OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Chalcogenide Semiconductor Thin Films

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

Affiliations

Zhejiang engineering research center for fabrication and application of advanced photovoltaic materials, School of Materials Science and Engineering, NingboTech University, No.1 Qianhu South Road, Ningbo 315100, People’s Republic of China

Zhejiang engineering research center for fabrication and application of advanced photovoltaic materials, Institute for Carbon Neutrality, Ningbo Innovation Centre, Zhejiang University, Ningbo 315048, People’s Republic of China

Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute of Applied Physics, TU Dresden, Nöthnitzer Str. 61, 01187 Dresden, Germany

National Laboratory of Solid State Microstructures, School of Physics, Nanjing University Nanjing 210093, People’s Republic of China

Funding

Natural Science Foundation of Ningbo Municipality · National Key Research and Development Program of China · Ningbo Municipal Bureau of Science and Technology · Natural Science Foundation of Zhejiang Province · Education Department of Zhejiang Province

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