Abstract
Zn3P2 is an important p-type semiconductor with the ability to detect almost all visible and ultraviolet light. By using the simple and efficient contact printing process, we reported the assembly of horizontally-aligned p-type Zn3P2 nanowire arrays to be used as building blocks for high performance photodetectors. Horizontally-aligned Zn3P2 nanowire arrays were first printed on silicon substrate to make thin-film transistors, exhibiting typical p-type transistor behavior with a high on/off ratio of 103. Besides, the Zn3P2 nanowire array based devices showed a substantial response to illuminated lights with a wide range of wavelengths and densities. Flexible photodetectors were also fabricated by contact printing of horizontally-aligned Zn3P2 nanowire arrays on flexible PET substrate, showing a comparable performance to the device on rigid silicon substrate.
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