Special Issue (Adv. Funct. Mater. 47/2019)

This special issue highlights important aspects in the research of emerging photovoltaic materials from both fundamental research and commercialization perspectives. A broader light absorption range, reduced defects in the photoactive film, as well as smaller barriers for carrier transfer or transportation are key factors for the power conversion efficiency of solar cell devices, which are progressively optimized by material design and device engineering, leading to competitive solar technology.