Si/Cu 2O Nanowires Heterojunction as Effective Position-Sensitive Platform

Cu 2O nanowires (Nws) network-based heterojunction was observed to have a position-sensitive photovoltaic characteristic. Its amplitude of the photovoltage (V ph) varied regularly with the position of incidence of the 532nm laser radiation onto the Cu 2O NWs surface. The V ph of this platform varies with the light position described as ？V ph/？x is approximate ~14 mV/mm. Besides, the photoresponse of this device is very stable. This position-sensitive platform is expected to serve as a convenient device as easily to be fabricated, high performing photodetector.