Self-powered p-NiO/n-ZnO heterojunction ultraviolet photodetectors fabricated on plastic substrates.
Md Rezaul HasanTing XieSara C BarronGuannan LiuNhan V NguyenAbhishek MotayedMulpuri V RaoRatan DebnathPublished in: APL materials (2015)
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 front or back side. Morphology, structural, chemical and optical properties of sputtered NiO and ZnO films were also investigated.
Keyphrases
- visible light
- quantum dots
- room temperature
- light emitting
- positron emission tomography
- pet ct
- computed tomography
- reduced graphene oxide
- sensitive detection
- pet imaging
- aqueous solution
- perovskite solar cells
- atomic force microscopy
- molecular dynamics
- mass spectrometry
- single molecule
- high resolution
- carbon nanotubes