Numerical Analysis on the Effect of the Conduction Band Offset in Dion–Jacobson Perovskite Solar Cells
Author:
Gan Yongjin1, Qiu Guixin2, Yan Chenqing1, Zeng Zhaoxiang1, Qin Binyi34, Bi Xueguang1ORCID, Liu Yucheng5ORCID
Affiliation:
1. School of Physics and Telecommunication Engineering, Yulin Normal University, Yulin 537000, China 2. Office of the Party Committee, Guangxi Minzu Normal University, Chongzuo 532200, China 3. Center for Applied Mathematics of Guangxi, Yulin Normal University, Yulin 537000, China 4. Guangxi Colleges and Universities Key Laboratory of Complex System Optimization and Big Data Processing, Yulin Normal University, Yulin 537000, China 5. Department of Mechanical Engineering, South Dakota State University, Brookings, SD 57007, USA
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/TiO2/Dion–Jacobson (DJ) perovskite/NiOx/Au structures, based on the solar cell simulation software SCAPS. The absorption layers employed in the study included PeDAMA2Pb3I10, PeDAMA3Pb4I13, PeDAMA4Pb5I16, and PeDAMA5Pb6I19. 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.
Funder
Yulin Normal University Guangxi Key Laboratory of optoelectronic information processing project Guangxi University Innovation and Entrepreneurship Training Program for College Students
Subject
Energy (miscellaneous),Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment,Electrical and Electronic Engineering,Control and Optimization,Engineering (miscellaneous),Building and Construction
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