Constructing high-performance photo-electrodes by patterning the photo-active
semiconducting components with desirable texture and architecture is one of the most
promising approaches to achieve the practical and scale-up application of photo-electric
or photoelectrochemical (PEC) devices. However, it is a still big challenge to efficiently
and effectively handle nano-structural semiconducting materials into intergraded circuit
devices, displaying good electric-contact and stability. Here, a facile manufacture
strategy for fabricating native metal-oxides based photo-electrodes by directly printing
Ga-based liquid metals is explored. The PEC device, functionalized by the native
Ga-oxide functional layer, exhibits self-powered photo-detection behaviors and presents
fast photo-electric responsibility in response to the simulated Sunlight illumination.
This printable PEC device shows good potential for high sensitive self-powered
photo-detector and provides a flexible and versatile approach for the design and
fabrication of novel electrode structures.