Boosting Photo-thermo-electric Conversion via a Donor–Acceptor Organic Cocrystal Strategy

The inaugural instance of photo-thermo-electric conversion has been demonstrated based on the donor–acceptor organic cocrystal strategy due to its unique advantages. Notably, the selected cocrystal exhibits excellent broad solar absorption (200–2500 nm) and high near-infrared photothermal conversion efficiency. Combining organic cocrystals and thermoelectric devices upon 1 sun results in an exceptional open circuit voltage (0.427 V) and output power density (2.21 W·m –2 ), which is significantly better than traditional photothermal conversion materials. The fusion of organic cocrystals and high-output power density thermoelectric devices can offer a promising solar-based photo-thermo-electric conversion technology for outdoor portable power generation and remote rural areas.