Performance and stability analysis of all-perovskite tandem photovoltaics in light-driven electrochemical water splitting
Nature Communications Springer Nature 16:1 (2025) 174
Abstract:
All-perovskite tandem photovoltaics are a potentially cost-effective technology to power chemical fuel production, such as green hydrogen. However, their application is limited by deficits in open-circuit voltage and, more challengingly, poor operational stability of the photovoltaic cell. Here we report a laboratory-scale solar-assisted water-splitting system using an electrochemical flow cell and an all-perovskite tandem solar cell. We begin by treating the perovskite surface with a propane-1,3-diammonium iodide solution that reduces interface non-radiative recombination losses and achieves an open-circuit voltage above 90% of the detailed-balance limit for single-junction solar cells between the bandgap of 1.6–1.8 eV. Specifically, a high open-circuit voltage of 1.35 V and maximum power conversion efficiency of 19.9% are achieved at a 1.77 eV bandgap. This enables monolithic all-perovskite tandem solar cells with a 26.0% power conversion efficiency at 1 cm2 area and a pioneering photovoltaic-electrochemical system with a maximum solar-to-hydrogen efficiency of 17.8%. The system retains over 60% of its peak performance after operating for more than 180 h. We find that the performance loss is mainly due to the degradation of the photovoltaic component. We observe severe charge collection losses in the narrow-bandgap sub-cell that can be attributed to the interface degradation between the narrow-bandgap perovskite and the hole-transporting layer. Our study suggests that developing chemically stable absorbers and contact layers is critical for the applications of all-perovskite tandem photovoltaics.Performance and stability analysis of all-perovskite tandem photovoltaics in light-driven electrochemical water splitting
University of Oxford (2025)
Abstract:
January 4, 2025Approaching the radiative limits for wide bandgap perovskite solar cells using fullerene blend electron transport interlayers
University of Oxford (2025)
Abstract:
Data was acquired according to the methods section of this publication. Data files require Origin to process.Solvent-additive cascade engineering enables single-oriented perovskite films with facet-driven performance and stability
Energy & Environmental Science Royal Society of Chemistry (RSC) (2025)
Abstract:
<jats:p>This study pioneers a solvent-additive cascade strategy to achieve crystallographically homogenous perovskite films, breaking the efficiency–stability trade-off by harnessing facet-dependent properties for record performance.</jats:p>Dopant-induced interactions in spiro-OMeTAD: Advancing hole transport for perovskite solar cells
Materials Science and Engineering R Reports Elsevier 162 (2025) 100875