FA+ and Cs+ substituted thermally stable MA-based triple cation perovskite absorber layer on spray deposited TiO2 ETL layer

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Pub Date : 2025-07-11 DOI:10.1016/j.optmat.2025.117310

Asim Aftab, Md Imteyaz Ahmad

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引用次数: 0

Abstract

Pure methylammonium lead iodide (MAPbI₃) perovskites are sensitive to moisture and processing conditions. MAPbI₃ is comparatively more sensitive to moisture than FAPbI₃; however, unlike FAPbI₃, it does not show any non-perovskite phase at room temperature (RT). Although stabilization of FAPbI₃-based perovskite through partial substitution of the A-site has been explored extensively, a similar strategy for MAPbI₃ stabilization has not been explored much. We have partially substituted FA⁺ and Cs⁺ for MAPbI₃ (forming Cs_0.1FA_0.15MA_0.75PbI₃ perovskite) to improve the structural and thermal stability. Adding Cs⁺ along with FA⁺ restricts the formation of any undesired phase, while the structure remained stable up to 1000 h when stored at 70 °C, thus improving structural and thermal stability. The device fabricated on spray-deposited TiO₂ ETL realized PCE close to 16 %. The cells retained about 65 % of their original efficiency after ageing for 1000 h at 70 °C.

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在喷雾沉积TiO2 ETL层上用FA+和Cs+取代热稳定的ma基三阳离子钙钛矿吸收层

纯甲基碘化铅（MAPbI3）钙钛矿对水分和加工条件敏感。MAPbI3对水分的敏感性高于FAPbI3；然而，与FAPbI3不同，它在室温（RT）下不显示任何非钙钛矿相。虽然通过部分取代a位来稳定基于fapbi3的钙钛矿已经被广泛探索，但类似的稳定MAPbI3的策略还没有被探索得很多。我们用FA+和Cs+部分取代了MAPbI3（形成Cs0.1FA0.15MA0.75PbI3钙钛矿），提高了结构和热稳定性。Cs+和FA+的加入限制了任何不良相的形成，而在70℃下保存1000 h后结构仍保持稳定，从而提高了结构和热稳定性。在喷镀TiO2 ETL上制备的器件实现了接近16%的PCE。在70℃下老化1000 h后，细胞的效率保持在原来的65%左右。

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.