UV light controllable depletion zone of metal sulfide/ polyaniline p-n junction and its application in a photoresponsive sensor

A photoresponsive sensor that UV light controlled depletion zone thickness was report. This p-n junction depletion zone lies between the n-type ZnS and p-type polyaniline. The photoresponsive sensors were constructed by combining polyaniline/ZnS p-n heterojunction and ZnO nanorods. Different from the traditional photosensitive nanomaterials whose conductivity increases with UV illumination intensity, the conductivity of the photoresponsive sensor studied in this articles decreased when the UV light was turned on.