Affiliation:
1. The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials Institute of Polymer Chemistry College of Chemistry and Renewable Energy Conversion and Storage Center (RECAST) Nankai University Tianjin 300071 China
2. The Institute of Seawater Desalination and Multipurpose Utilization Ministry of Natural Resources Tianjin 300192 China
3. Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192 China
Abstract
AbstractThe hygroscopic dopants used in Spiro‐OMeTAD hole transport material (HTM) in state‐of‐the‐art perovskite solar cells (PSCs) inevitably induce premature degradation of the devices. Here, two multifunctional polymer interface materials based on the perylene diimides (PDI) unit are developed. It is found that quasi‐two‐dimensional (2D) polymer 2DP‐PDI can form a denser film and exhibit better hydrophobicity than linear polymer P‐PDI. Importantly, 2DP‐PDI can passivate the surface defects and extract hole carriers of perovskite film more effectively, leading to much reduced nonradiative recombination loss. With polymer interface material between the perovskite and HTM layers, the optimized device using 2DP‐PDI and P‐PDI yields a champion PCE of 24.20% and 23.09%, respectively, along with significantly improved stability, whereas the control device shows a lower efficiency of 22.23%. These results suggest that developing multifunctional polymer interface materials can be a promising strategy to improve the efficiency and stability of PSCs.
Funder
National Natural Science Foundation of China
National Key Research and Development Program of China
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry
Cited by
5 articles.
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