Solar power generation performance of MoO2/Mo4O11 photothermal nanomaterials

The two-phase MoO 2 /Mo 4 O 11 NPs were prepared by dry reduction of MoO 3 NPs, which are highly regarded for their excellent solar photovoltaic conversion performance and excellent thermal stability. The materials were tested and found to have less than 10 % reflectance and up to more than 95 % absorption in the range of 200–2500 nm of the AM1.5 global standard solar spectrum. The two-phase MoO 2 /Mo 4 O 11 NPs rapidly warmed up from room temperature to the maximum equilibrium temperature of 50 °C in 20 s under one solar light intensity. And no photothermal degradation occurred under five photothermal cycle tests. The two-phase MoO 2 /Mo 4 O 11 NPs were combined with the temperature difference power generation technology to construct a photothermal power generation device. Under a standard sunlight intensity, the voltage can reach 0.27 V, and the maximum voltage that can be achieved in the photothermal power generation cycle test is almost the same. • Solar photothermal materials combined with thermoelectric power generation to form solar photothermal power generation device. • Two-phase MoO 2 /Mo 4 O 11 NPs with broad solar absorption spectra. • Two-phase MoO 2 /Mo 4 O 11 NPs with high photothermal stability without photothermal degradation.