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Revealing Interaction of Fluorinated Propylamine Hydrochloride with Precursor and Defect States of Perovskite Films Toward Efficient Flexible Solar Cellsстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 26 февраля 2025 г.
- Авторы: Cao Shuguang, Bi Zhuoneng, Zheng Tongjun, Luo Shizi, Gutsev Lavrenty G., Ramachandran Bala R., Ozerova Victoria V., Emelianov Nikita A., Slesarenko Nikita A., Zheng Yupeng, Taye Biniyam Zemene, Gutsev Gennady L., Aldoshin Sergey M., Troshin Pavel A., Xu Xueqing
- Журнал: Advanced Functional Materials
- Том: 34
- Номер: 42
- Год издания: 2024
- Издательство: John Wiley & Sons Ltd.
- Местоположение издательства: United Kingdom
- Первая страница: 2405078
- DOI: 10.1002/adfm.202405078
- Аннотация: The trap state at the surfaces and grain boundaries of perovskite is one of themajor obstacles to the further commercialization of flexible perovskite solarcells (FPSCs). Herein, two innovative multifunctional fluorinated propylaminesalt 2,2,3,3,3-pentafluoropropylamine hydrochloride (PFPACl) and3,3,3-triflupropylamine hydrochloride (TFPACl) are in situ introduced onto thephoto absorbing layer to improve the performance of the FPSCs. The nuclearmagnetic resonance (NMR) spectroscopy indicates strong interactions of bothPFPACl and TFPACl with the perovskite precursor components. For the firsttime, the structures of the supramolecular complexes formed by two additiveswith FAI are deduced from NOESY NMR data, thus pointing to theimportance of the preorganization of the perovskite components in solutionbefore film casting. The experiments and density functionaltheory(DFT) calculations reveal that PFPACl is likely dissociated more into theform of R-NH3+-Cl− due to the higher electronegativity of the fluoroalkyl tail.Therefore, PFPA+ binds more strongly to VFA defects than TFPA+, and anionCl− has strong enough interaction with VFAI and uncoordinated Pb2+, leadingto homogeneous coverage of PFPACl on the entire surface of the perovskitefilms and better energy alignment with the hole transport layer. Consequently,PFPACl-treated FPSCs achieved a relatively high PCE of 23.59% with excellentmechanical robustness and operational stability
- Добавил в систему: Алдошин Сергей Михайлович