Ultraviolet, visible, and near infrared photoresponse properties of solution processed graphene oxide

The photoresponse properties of solution processed graphene oxide (GO) ranged from ultraviolet-visible-near infrared regime are studied. Photoelectrochemical results indicate that the as-prepared GO devices have excellent sensitivity, high-speed and superior reproducibility as a visible and near infrared photodetector. Especially, the responsivity and external quantum efficiency are found to be about 95.8 mA/W and 26.2%, respectively, for incident wavelength of 455 nm at 0.8 V bias voltage. Resulting from the degradation of GO under UV irradiation, the GO devices exhibit unstable photoresponse performance, as well as high UV photosensitivity.

Highlights► Photoresponse properties of solution processed graphene oxide were studied. ► GO devices have high sensitivity, high-speed and superior reproducibility as a visible and near infrared photodetector. ► The responsivity and external quantum efficiency are found to be reached about 95.8 mA/W and 26.2%, respectively, for incident wavelength of 455 nm.