@article{c058a5116ffe48188d5a89e2af03894a,
title = "Bridging the Interfacial Contact for Improved Stability and Efficiency of Inverted Perovskite Solar Cells",
abstract = "Inverted perovskite solar cells (PSCs) have received widespread attention due to their facile fabrication and wide applications. However, their power conversion efficiency (PCE) is reported lower than that of regular PSCs because of the undesirable interfacial contact between perovskite and the hydrophobic hole transport layer (HTL). Here, an interface regulation strategy is proposed to overcome this limitation. A small molecule ([2-(9H-carbazol-9-yl) ethyl] phosphonic acid, abbreviated as 2P), composed of carbazole and phosphonic acid groups, is inserted between perovskite and HTL. Morphological characterization and theoretical calculation reveal that perovskite bonds stronger on 2P-modified HTL than on pristine HTL. The improved interfacial contact facilitates hole extraction and retards degradation. Upon the incorporation of 2P, inverted PSCs deliver a high PCE of over 22% with superior stability, keeping 84.6% of initial efficiency after 7200 h storage under an ambient atmosphere with a relative humidity of ≈30–40%. This strategy provides a simple and efficient way to boost the performance of inverted PSCs.",
keywords = "hole extraction, interfacial contact, inverted perovskite solar cells, stability",
author = "Yulan Huang and Tanghao Liu and Dongyang Li and Qing Lian and Yun Wang and Guoliang Wang and Guojun Mi and Yuanyuan Zhou and Abbas Amini and Baomin Xu and Zikang Tang and Chun Cheng and Guichuan Xing",
note = "The authors acknowledge the Natural Science Foundation of China (Grant No. 91963129, 51776094, 61935017, and 62175268), the Basic Research Project of Science and Technology Plan of Shenzhen (Grant No. JCYJ20180504165655180), Shenzhen-Hong Kong-Macao Science and Technology Innovation Project (Category C) (SGDX2020110309360100), the Science and Technology Development Fund, Macao SAR (File no. FDCT-0044/2020/A1), UM's research fund (File no. MYRG2018-00148-IAPME, MYRG2020-00151-IAPME), Natural Science Foundation of Guangdong Province, China (2019A1515012186), Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials (2019B121205002), and Foundation of Shenzhen Science and Technology Innovation Committee (Grant No. JCYJ20180302174021198). The authors acknowledge the assistance of SUSTech Core Research Facilitates. Y.Z. acknowledges the start-up grants from the Department of Physics, Faculty of Science, and Research Committee at the Hong Kong Baptist University. Publisher Copyright: {\textcopyright} 2022 Wiley-VCH GmbH.",
year = "2022",
month = jun,
day = "16",
doi = "10.1002/smll.202201694",
language = "English",
volume = "18",
journal = "Small",
issn = "1613-6810",
publisher = "Wiley-VCH Verlag",
number = "24",
}
