Hasan, Md RezaulXie, TingBarron, Sara C.Liu, GuannanNguyen, Nhan V.Motayed, AbhishekRao, Mulpuri V.Debnath, Ratan2016-08-082016-08-082015-10-01Hasan, 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.https://hdl.handle.net/1920/10331A 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.en-USUltraviolet lightZinc oxide filmsII-VI semiconductorsIlluminationGoldArticlehttp://dx.doi.org/10.1063/1.4932194