Enhancing power conversion efficiency in inorganic lead-free tandem Perovskite solar cells: A simulation study

Document Type : Research Article

Authors

1 faculty of department GLA university Mathura

2 GLA UNIVERSITY MATHURA

3 GLA University Mathura

Abstract
The current research paper presents the results of a simulation-based study on all-perovskite tandem multijunction devices using perovskites. The tandem structure considered in this study combines wide bandgap perovskites with 〖CsSnBr〗_3 (bandgap 1.8 eV) as the top cell and Cs_2 AuBiCl_6 (bandgap 1.2 eV) as the bottom cell. . Additional features of this study include the projection of tandem solar cells using lead-free perovskites containing 〖CsSnBr〗_3 and Cs_2 AuBiCl_6 .

The effectiveness of the proposed tandem design is evaluated in two steps: first, we simulate a 1.8 eV perovskite-based top cell and tune the conversion efficiency to 9.8%. We then simulate a 1.2 eV perovskite-based bottom cell with a calibrated efficiency of 13.7%. After the standalone subcell calibration is completed, the tandem configuration is evaluated. The current matching condition between the top and bottom cells is determined by varying the thickness of the absorption layer of both subcells. The optimal thickness of the top cell is 350 nm and the optimal thickness of the bottom cell is 390 nm. When feeding the top and bottom cells with filtered spectra, the conversion efficiencies are 9.8% and 7.88%, respectively. Overall, the tandem design showed a conversion efficiency of 18.7%

Graphical Abstract

Enhancing power conversion efficiency in inorganic lead-free tandem Perovskite solar cells: A simulation study

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Volume 7, Issue 3 - Serial Number 3
March and April 2024
Pages 491-500

  • Receive Date 10 April 2024
  • Revise Date 21 May 2024
  • Accept Date 22 May 2024