Energy Spotlight

A s the focus of single-junction halide perovskite solar cells now extends to commercialization, new interest in improving efficiency through tandem design is gaining momentum.While perovskite/Si tandem solar cells have delivered efficiencies close to 30%, other configurations are emerging.In this Energy Spotlight, we highlight two recent articles, the first on thin-film photovoltaics composed of twoterminal perovskite/CuInSe 2 tandem solar cells, and the second focused on tracking changes in structural and electronic properties of the perovskite-based photovoltaic devices under the stimuli of an electric field and light illumination.