Efficient heterojunction constructed from wide-bandgap and narrow-bandgap small molecules enables dual-band absorption transparent photovoltaics

A small-molecule-based dual-band absorption TPV with AVT of over 70% is demonstrated in this work. The efficient heterojunction enables the champion opaque device to achieve a PCE of 7.34% and TPVs to achieve a PCE of 3.31% with AVT exceeding 70%.