This work demonstrates a lead-free tandem solar cell design achieving a 31.82% efficiency, indicating a promising alternative for solar energy.
Single‐junction perovskite solar cells (PSCs) have been extensively explored and developed over the past few years due to their exceptional optoelectronic properties. However, owing to the Shockley‐Queisser limit, tandem solar cells are now being explored for experimental realization and to increase the power conversion efficiency (PCE) of presently deployed solar cells. In this work, we propose a solar cell with a novel lead‐free perovskite, Ca 3 AsI 3 , as the top sub‐cell absorber layer having a band gap of 1.577 eV, a high environmental stability and high absorption coefficient, and MoS 2 as the bottom sub‐cell absorber layer of this tandem cell having a narrow band gap (1.2–1.9 eV), high absorption coefficient along with high carrier mobility, eco‐friendliness, and reduced cost. We investigated the performance parameters using numerical simulations and obtained a high PCE of 31.82% with a open‐circuit voltage (V oc ) of 2.18 V, short‐circuit current density (J sc ) of 18.59 mA.cm − 2 , and fill factor (FF) of 78.53% achieved under AM 1.5G spectrum for the optimized current‐matched configuration. These results highlight the strong potential for the experimental realization of Ca 3 AsI 3 /MoS 2 tandem solar cells, offering an environmental friendly and easy‐to‐manufacture alternative for next‐generation photovoltaics.
No takes yet. Share an insight, caveat, or question.
Mittal et al. (2026) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: