@article{c2de1a3512fe4530852f7cdb335bbb1b,
title = "Highly Efficient and Stable CsPbTh3 (Th = I, Br, Cl) Perovskite Solar Cells by Combinational Passivation Strategy",
abstract = "The distorted lead iodide octahedra of all-inorganic perovskite based on triple halide-mixed CsPb(I2.85Br0.149Cl0.001) framework have made a tremendous breakthrough in its black phase stability and photovoltaic efficiency. However, their performance still suffers from severe ion migration, trap-induced nonradiative recombination, and black phase instability due to lower tolerance factor and high total energy. Here, a combinational passivation strategy to suppress ion migration and reduce traps both on the surface and in the bulk of the CsPhTh3 perovskite film is developed, resulting in improved power conversion efficiency (PCE) to as high as 19.37%. The involvement of guanidinium (GA) into the CsPhTh3 perovskite bulk film and glycocyamine (GCA) passivation on the perovskite surface and grain boundary synergistically enlarge the tolerance factor and suppress the trap state density. In addition, the acetate anion as a nucleating agent significantly improves the thermodynamic stability of GA-doped CsPbTh3 film through the slight distortion of PbI6 octahedra. The decreased nonradiative recombination loss translates to a high fill factor of 82.1% and open-circuit voltage (VOC) of 1.17 V. Furthermore, bare CsPbTh3 perovskite solar cells without any encapsulation retain 80% of its initial PCE value after being stored for one month under ambient conditions.",
keywords = "CsPbTh, combinational passivation, efficiency, solar cells, stability",
author = "Kang Wang and Simin Ma and Xiaoyang Xue and Tong Li and Simiao Sha and Xiaodong Ren and Jingru Zhang and Hui Lu and Jinfu Ma and Shengwei Guo and Yucheng Liu and Jiangshan Feng and Adel Najar and Shengzhong Liu",
note = "Funding Information: This work was financially supported by the Fundamental Research Funds for the Central Universities, North Minzu University (Grant Nos. 2021JCYJ08, 2020KYQD31), the Graduate Innovation Project of North Minzu University (Grant No. YCX21117), the Joint Talent Cultivation Funds of NSFC‐HN (Grant No. U1604138), the National Natural Science Foundation of China (Grant Nos. 62104006, 62104173), the National Key Research and Development Program of China (Grant No. 2016YFA0202403), the DNL Cooperation Fund CAS (Grant No. DNL180311), the Chinese National 1000‐talent‐plan program (Grant No. 1110010341), the Fundamental Research Funds for the Central Universities, Shaanxi Normal University (Grant No. GK202103113), the Project funded by China Postdoctoral Science Foundation (Grant No. BX2021173), the Shanxi Science and Technology Department (Grant No. 20201101012), and the UAEU and Shaanxi Normal University (Grant No. 31S464). Funding Information: This work was financially supported by the Fundamental Research Funds for the Central Universities, North Minzu University (Grant Nos. 2021JCYJ08, 2020KYQD31), the Graduate Innovation Project of North Minzu University (Grant No. YCX21117), the Joint Talent Cultivation Funds of NSFC-HN (Grant No. U1604138), the National Natural Science Foundation of China (Grant Nos. 62104006, 62104173), the National Key Research and Development Program of China (Grant No. 2016YFA0202403), the DNL Cooperation Fund CAS (Grant No. DNL180311), the Chinese National 1000-talent-plan program (Grant No. 1110010341), the Fundamental Research Funds for the Central Universities, Shaanxi Normal University (Grant No. GK202103113), the Project funded by China Postdoctoral Science Foundation (Grant No. BX2021173), the Shanxi Science and Technology Department (Grant No. 20201101012), and the UAEU and Shaanxi Normal University (Grant No. 31S464). Publisher Copyright: {\textcopyright} 2022 The Authors. Advanced Science published by Wiley-VCH GmbH.",
year = "2022",
month = mar,
day = "25",
doi = "10.1002/advs.202105103",
language = "English",
volume = "9",
journal = "Advanced Science",
issn = "2198-3844",
publisher = "Wiley-VCH Verlag",
number = "9",
}