Numerical Analysis on the Effect of the Conduction Band Offset in Dion–Jacobson Perovskite Solar Cells

Yongjin Gan, Guixin Qiu, Chenqing Yan, Zhaoxiang Zeng, Binyi Qin, Xueguang Bi () and Yucheng Liu ()
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Yongjin Gan: School of Physics and Telecommunication Engineering, Yulin Normal University, Yulin 537000, China
Guixin Qiu: Office of the Party Committee, Guangxi Minzu Normal University, Chongzuo 532200, China
Chenqing Yan: School of Physics and Telecommunication Engineering, Yulin Normal University, Yulin 537000, China
Zhaoxiang Zeng: School of Physics and Telecommunication Engineering, Yulin Normal University, Yulin 537000, China
Binyi Qin: Center for Applied Mathematics of Guangxi, Yulin Normal University, Yulin 537000, China
Xueguang Bi: School of Physics and Telecommunication Engineering, Yulin Normal University, Yulin 537000, China
Yucheng Liu: Department of Mechanical Engineering, South Dakota State University, Brookings, SD 57007, USA

Energies, 2023, vol. 16, issue 23, 1-13

Abstract: Benefiting from the advantages of a high absorption coefficient, a long charge diffusion length, excellent carrier mobility, and a tunable bandgap, three-dimensional (3D) metal halide perovskites exhibit great potential for application in solar cells. However, 3D perovskite solar cells (PSCs) often suffer from poor long-term stability against moisture, heat, and light. To address this issue, reducing the dimension of perovskite and forming two-dimensional (2D) perovskites can be effective in slowing down the oxidation of the perovskite film and significantly improving device stability. In this study, 2D PSCs were designed with glass/FTO/TiO 2 /Dion–Jacobson (DJ) perovskite/NiOx/Au structures, based on the solar cell simulation software SCAPS. The absorption layers employed in the study included PeDAMA 2 Pb 3 I 10 , PeDAMA 3 Pb 4 I 13 , PeDAMA 4 Pb 5 I 16 , and PeDAMA 5 Pb 6 I 19 . The influence of the conduction band offset ( CBO ) variation in the range of −0.5 to 0.5 eV on cell performance was explored through a numerical simulation. The simulation results indicate that the open-circuit voltage and fill factor continue to increase, whereas the short-circuit current density remains almost unchanged when the CBO increases from −0.5 eV to 0 eV. The devices exhibit better performance when the value of the CBO is positive and within a small range. For DJ PSCs, controlling the CBO within 0.1–0.4 eV is conducive to better cell performance.

Keywords: solar cell; two-dimensional perovskites; SCAPS; conduction band offset; performance (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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