Self-powered p-NiO/n-ZnO heterojunction ultraviolet photodetectors fabricated on plastic substrates




Hasan, Md Rezaul
Xie, Ting
Barron, Sara C.
Liu, Guannan
Nguyen, Nhan V.
Motayed, Abhishek
Rao, Mulpuri V.
Debnath, Ratan

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American Institute of Physics


A self-powered ultraviolet (UV) photodetector (PD) based on p-NiO and n-ZnO was fabricated using low-temperature sputtering technique on indium doped tin oxide (ITO) coated plastic polyethylene terephthalate (PET) substrates. The p-n heterojunction showed very fast temporal photoresponse with excellent quantum efficiency of over 63% under UV illumination at an applied reverse bias of 1.2 V. The engineered ultrathin Ti/Au top metal contacts and UV transparent PET/ITO substrates allowed the PDs to be illuminated through either frontside or backside. Morphology, structural, chemical, and optical properties of sputtered NiO and ZnO films were also investigated.



Ultraviolet light, Zinc oxide films, II-VI semiconductors, Illumination, Gold


Hasan, Md Rezaul, Ting Xie, Sara C. Barron, Guannan Liu, Nhan V. Nguyen, Abhishek Motayed, Mulpuri V. Rao, and Ratan Debnath. “Self-Powered P-NiO/n-ZnO Heterojunction Ultraviolet Photodetectors Fabricated on Plastic Substrates.” APL Materials 3, no. 10 (October 1, 2015): 106101. doi:10.1063/1.4932194.