Presentation Details
Albedo-Assisted Bifacial Operation of Single-Junction Triple-Cation Perovskite Solar Cells

Atanu Purkayastha, Anuj Kumar Palariya, Anurag Dehengia, Satish Patil, Sushobhan Avasthi.

Indian Institute of Science, Bengaluru, India

Abstract


Ground albedo plays a critical role in modifying the effective optical environment of photovoltaic devices by introducing reflected irradiance from surrounding surfaces. In this work, we investigate the influence of realistic ground albedo conditions on the photovoltaic performance of a triple-cation single-junction perovskite solar cell (TCPSC). An experimentally fabricated TCPSC employing an opaque silver (Ag) back contact is first demonstrated to establish material and process feasibility, yielding a power conversion efficiency (PCE) of 18.84% under standard front-side AM1.5G illumination. Albedo-assisted performance is subsequently evaluated using optical–electrical simulations by incorporating representative natural surfaces, including snow, dry grass, sandstone, white sand, soil, pond water, and seawater. The results show that ground albedo predominantly enhances the short-circuit current density (JSC), while the open-circuit voltage (VOC) and fill factor (FF) remain largely unchanged. Under high-albedo conditions such as snow, a maximum effective front-referenced PCE of 41.55% is achieved, corresponding to an improvement of ∼72.6% relative to the baseline Ag-back-contact device. These results demonstrate that the efficiency enhancement arises solely from albedo-induced optical photocurrent enhancement and highlight the importance of deployment environment in maximizing the effective performance of perovskite solar cells.

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