This article provides an examination of the long-term potential of antimony selenide (${\mathrm{Sb}}_2{\mathrm{Se}}_3$) as a leading photovoltaic absorber by considering lessons learned from the developmental route of $\mathrm{Cd}\mathrm{Te}$. We consider the inherent advantages of ${\mathrm{Sb}}_2{\mathrm{Se}}_3$, such as its ability to function efficiently in both substrate and superstrate configurations, its grain boundary tolerance, and wide scope of deposition possibilities. By drawing parallels with the historical evolution of $\mathrm{Cd}\mathrm{Te}$ solar cells, we highlight critical lessons that could guide the optimization of ${\mathrm{Sb}}_2{\mathrm{Se}}_3$ devices, including the importance of understanding and controlling doping mechanisms, band-gap grading, and device structure on performance. We also consider the feasibility of adapting existing $\mathrm{Cd}\mathrm{Te}$ production capabilities for ${\mathrm{Sb}}_2{\mathrm{Se}}_3$ fabrication, which could potentially lead to reduced production costs and shorter energy payback times. Despite the challenges and uncertainties that lie ahead, we argue that the promise shown by ${\mathrm{Sb}}_2{\mathrm{Se}}_3$ warrants significant research and development efforts, with the view of making it a viable contender in the solar industry.

• Received 9 June 2023

DOI:https://doi.org/10.1103/PRXEnergy.2.041001

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

Published by the American Physical Society