Photovoltaic properties of VO₂(B) flexible films

VO 2 (B) nanoribbons were synthesized by hydrothermal method by taking vanadium pentoxide as the vanadium source and polyethylene glycol as the reducing agent. The high-quality and dark blue flexible VO 2 (B) films with a single physical phase were produced by vacuum filtration. When 36 h of hydrothermal, the VO 2 (B) flexible film had the highest TCR of 3.9 %/K after vacuum filtration. A simple VO 2 (B) optoelectronic device was prepared using the VO 2 (B) film. At a wavelength of 1550 nm, when the power densities are 530.79 mW/cm 2 , 1061.57 mW/cm 2 , 2123.14 mW/cm 2 , 4246.28 mW/cm 2 , the rise response times are 324 ms, 435 ms, 390 ms, 518 ms, and the current response rates are 33.45 mA/W, 30.65 mA/W, 30.18 mA/W, and 25.96 mA/W for the VO 2 (B) optoelectronic device, respectively. The simple VO 2 (B) optoelectronic device has high reversibility and stability. This study shows that the VO 2 (B) thin films have great potential for uncooled infrared optoelectronic detection and the optoelectronic detection performance can be improved by changing the structure of VO 2 (B) films.