Spontaneous decoration of ionic compounds at perovskite interfaces to achieve 23.38% efficiency with 85% fill factor in NiOX-based perovskite solar cells

Qu，Geping1,2; Wang，Deng3,4; Liu，Xiaoyuan2; Qiao，Ying2; Khan，Danish2,6; Li，Yinxin2; Zeng，Jie3,4; Xie，Pengfei1,2; Xu，Yintai3; Zhu，Peide3; Huang，Limin2; Wang，Yang Gang2; Xu，Baomin3,5; Xu，Zong Xiang1,2,5

2023-10-01

10.1016/j.jechem.2023.05.035

Journal of Energy Chemistry   Impact Factor & Quartile

2095-4956

Inorganic hole transport materials, particularly NiO, have shown considerable promise in boosting the efficiency and stability of perovskite solar cells. However, a major barrier to commercialization of NiO-based perovskite solar cells with positive-intrinsic-negative architectures is their direct contact with the absorbing layer, which can lead to losses of photovoltage and fill factor. Furthermore, highly positive under-coordinated Ni cations degrade the perovskite at the interface. Here, we address these issues with the use of an ionic compound (QAPyBF) as an additive to passivate defects throughout the perovskite layer and improve carrier conduction and interactions with under-coordinated Ni cations. Specifically, the highly electronegative inorganic anion [BF] interacts with the NiOx/perovskite interface to passivate under-coordinated cations (Ni). Accordingly, the decorated cells achieved a power conversion efficiency of 23.38% and a fill factor of 85.5% without a complex surface treatment or NiO doping.

Defect passivation, Nickel oxide Heterojunction interface Perovskite solar cell π-Conjugated ionic compound

SCI

English

Corresponding

National Key Research and Development Project from the Ministry of Science and Technology of China[2021YFB3800103] ; National Natural Science Foundation of China[22209068] ; General Program of Basic Research in Shenzhen[JCYJ20220530112801004] ; Major Program of Guangdong Basic and Applied Research Foundation["2019B1515120083","2019B121205001","2019B030302009"]

Chemistry ; Energy & Fuels ; Engineering

Chemistry, Applied ; Chemistry, Physical ; Energy & Fuels ; Engineering, Chemical

WOS:001046917500001

ELSEVIER

2-s2.0-85165330113

Scopus

1.School of Chemistry and Chemical Engineering,Harbin Institute of Technology,Harbin,Heilongjiang,150001,China
2.Department of Chemistry,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
3.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
4.Department of Materials Science and Engineering,City University of Hong Kong,Hong Kong,999077,Hong Kong
5.Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
6.College of New Materials and New Energies,Shenzhen Technology University,Shenzhen,Guangdong,518118,China

Qu，Geping,Wang，Deng,Liu，Xiaoyuan,et al. Spontaneous decoration of ionic compounds at perovskite interfaces to achieve 23.38% efficiency with 85% fill factor in NiOX-based perovskite solar cells[J]. Journal of Energy Chemistry,2023,85:39-48.

Qu，Geping.,Wang，Deng.,Liu，Xiaoyuan.,Qiao，Ying.,Khan，Danish.,...&Xu，Zong Xiang.(2023).Spontaneous decoration of ionic compounds at perovskite interfaces to achieve 23.38% efficiency with 85% fill factor in NiOX-based perovskite solar cells.Journal of Energy Chemistry,85,39-48.

Qu，Geping,et al."Spontaneous decoration of ionic compounds at perovskite interfaces to achieve 23.38% efficiency with 85% fill factor in NiOX-based perovskite solar cells".Journal of Energy Chemistry 85(2023):39-48.