Reconstructing subsurface lattice for stable perovskite photovoltaics

Gao，Zhi Wen1; Wang，Yong2,3; Chen，Xiwen4; Jiang，Zhengyan1,5,6; Qin，Minchao7; Ning，Weihua8; Hu，Bihua5,6; Lu，Xinhui7; Yin，Wan Jian4; Yang，Deren2,3; Xu，Baomin5,6,9; Choy，Wallace C.H.1

2024-01-17

10.1016/j.joule.2023.11.014

Joule   影响因子和分区

2542-4351

Formamidinium (FA)-based perovskites with an ideal tolerance factor still face structure stability challenges because of corner-sharing and face-sharing octahedra competition. This seriously limits the long-term operational stability of FA-based perovskite solar cells (PSCs). Here, we demonstrate a subsurface lattice reconstruction strategy by simultaneously tuning the position of Pb and I planes. The reconstructed lattice configuration favors corner-sharing octahedra and makes the crystal lattice more stable, ultimately stabilizing FA-based perovskites. Additionally, the subsurface modification reduces defects and simultaneously tunes the valence band alignment, thereby increasing the charge carrier lifetime and improving carrier-selective transfer. Consequently, the resultant PSCs achieve a stabilized power conversion efficiency of ∼25%. Moreover, these PSCs exhibit excellent stability, retaining 96% initial efficiency after 6,000 h of storage in a dry box with ∼20% relative humidity at 25°C and 95% of their initial efficiency after over 3,000 h maximum power point test under simulated AM1.5 illumination.

octahedra perovskite solar cells phase transfer stability surface lattice reconstruction

SCI ; EI

英语

其他

2-s2.0-85181982010

Scopus

1.Department of Electrical and Electronic Engineering,University of Hong Kong,Hong Kong SAR,999077,Hong Kong
2.State Key Laboratory of Silicon Materials and School of Materials Science and Engineering,Zhejiang University,Hangzhou,Zhejiang,310027,China
3.Hangzhou Global Scientific and Technological Innovation Center,Zhejiang University,Hangzhou,310014,China
4.College of Energy,Soochow Institute for Energy and Materials Innovations,Jiangsu Provincial Key Laboratory for Advanced Carbon Materials and Wearable Energy Technologies,Soochow University,Suzhou,215006,China
5.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
6.Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices,Southern University of Science and Technology,Shenzhen,518055,China
7.Department of Physics,Chinese University of Hong Kong,Hong Kong SAR,999077,Hong Kong
8.Institute of Functional Nano & Soft Materials,Joint International Research Laboratory of Carbon-Based Functional Materials and Devices,Soochow University,Suzhou,215123,China
9.Key University Laboratory of Highly Efficient Utilization of Solar Energy and Sustainable Development of Guangdong,Southern University of Science and Technology,Shenzhen,518055,China

Gao，Zhi Wen,Wang，Yong,Chen，Xiwen,et al. Reconstructing subsurface lattice for stable perovskite photovoltaics[J]. Joule,2024,8(1):255-266.

Gao，Zhi Wen.,Wang，Yong.,Chen，Xiwen.,Jiang，Zhengyan.,Qin，Minchao.,...&Choy，Wallace C.H..(2024).Reconstructing subsurface lattice for stable perovskite photovoltaics.Joule,8(1),255-266.

Gao，Zhi Wen,et al."Reconstructing subsurface lattice for stable perovskite photovoltaics".Joule 8.1(2024):255-266.