Imaging Array and Complementary Photosensitive Inverter Based on P-Type SnO Thin-Film Phototransistors

P-type tin monoxide (SnO) thin-film phototransistors were developed with high photoresponsivity of 2.94 × 105 A/W and high detectivity of 1.82 × 1014 Jones, and these values are, to the best of our knowledge, among the highest for the reported oxide-semiconductor-based phototransistors. The excellent performances of these phototransistors were further demonstrated by incorporating the devices into a 10×10 array to successfully image a letter “A” pattern. Furthermore, by integration of n-type indium gallium zinc oxide and p-type SnO thin-film phototransistors, we realized a complementary photosensitive inverter. The inverter exhibits excellent photoresponse with a high voltage gain rate change of 194%. Our results indicates that the SnO based phototransistors have great potential in thin-film photoelectronic circuits and systems.