Multifunctional entinostat enhances the mechanical robustness and efficiency of flexible perovskite solar cells and minimodules

Xu, Wenzhan; Chen, Bo; Zhang, Zhao; Liu, Ye; Xian, Yeming; Wang, Xiaoming; Shi, Zhifang; Gu, Hangyu; Fei, Chengbin; Li, Nengxu; Uddin, Md Aslam; Zhang, Hengkai; Dou, Letian; Yan, Yanfa; Huang, Jinsong

doi:10.1038/s41566-023-01373-z

Multifunctional entinostat enhances the mechanical robustness and efficiency of flexible perovskite solar cells and minimodules

Journal Article · Wed Jan 17 23:00:00 EST 2024 · Nature Photonics

DOI:https://doi.org/10.1038/s41566-023-01373-z· OSTI ID:2337952

^[1]; Chen, Bo ^[2]; Zhang, Zhao ^[2]; Liu, Ye ^[2]; ^[3]; ^[3]; ^[4]; ^[4]; Fei, Chengbin ^[4]; Li, Nengxu ^[4]; Uddin, Md Aslam ^[4]; Zhang, Hengkai ^[4]; ^[5]; ^[3]; ^[4]

University of North Carolina at Chapel Hill, NC (United States); UNC at Chapel Hill
Perotech Inc, Chapel Hill, NC (United States)
University of Toledo, OH (United States)
University of North Carolina at Chapel Hill, NC (United States)
Purdue University, West Lafayette, IN (United States)

Flexible perovskite solar cells (F-PSCs), prized for their nature of soft and high power-weight compatibility, have attracted intensive attention. However, inferior buried perovskite-substrate interfaces due to low interfacial adhesion between perovskites and substrates and large deformation of flexible substrates have greatly limited the performance of F-PSCs. Here, we add organic molecule Entinostat (ET) into hole extraction material Poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA) to enhance the adhesion at the perovskite/substrate interface using the interactions of ET with perovskites, PTAA and indium tin oxide (ITO) through its multiple function groups. Meanwhile, ET added into perovskites reduces the voids at the bottom perovskite film, due to its capability to tune the crystallization of perovskites by forming adduct with lead. Consequently, the inverted small area F-PSCs achieved an efficiency of 23.4%. The flexible perovskite minimodule with an area of 9 cm² achieved an aperture efficiency of ~19.0% certified by National Renewable Energy Laboratory. Furthermore, the optimized unencapsulated flexible minimodule retained 84% of the initial efficiency after 5000 bending cycles and retained 90% of the initial PCE (T90) after light soaking for >750 hours.

View Accepted Manuscript (DOE)

Research Organization:: University of North Carolina at Chapel Hill, NC (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office; USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: EE0009520

OSTI ID:: 2337952

Journal Information:: Nature Photonics, Journal Name: Nature Photonics Journal Issue: 4 Vol. 18; ISSN 1749-4885

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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