Nonfullerene Acceptors for Semitransparent Organic Solar Cells

Semitransparent organic solar cells (ST-OSCs) have appealing features, such as flexibility, transparency, and color in addition to generating clean energy, and therefore show potential applications in building integrated photovoltaics and photovoltaic vehicles. Concerted efforts in materials synthesis (particularly low-band-gap polymer donors and nonfullerene acceptors) and device optimization (particularly incorporating transparent electrodes) have raised the efficiencies of ST-OSCs to >10%, with average visible transparency of >30%. In this Research News article, the recent progress in nonfullerene-based ST-OSCs is summarized and discussed. The future perspectives and research directions for the ST-OSCs field are proposed.