Metal-Semiconductor-Metal Ultraviolet Photodetectors Based on Zinc-Oxide Colloidal Nanoparticles

Metal-semiconductor-metal ultraviolet (UV) photodetectors were created with zinc-oxide colloidal nanoparticles coated with polyvinyl-alcohol. Gold-interdigitated finger contacts with different parameters were patterned on the nanoparticles by optical lithography. The photodetectors exhibited UV-phot...

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Veröffentlicht in:	IEEE electron device letters 2011-01, Vol.32 (1), p.51-53
Hauptverfasser:	Liqiao Qin, Shing, C, Sawyer, S
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Colloids Compound structure devices Dark current Electronics Exact sciences and technology Fingers General equipment and techniques Gold Instruments, apparatus, components and techniques common to several branches of physics and astronomy Lithography Metal-semiconductor-metal (MSM) ultraviolet (UV) photodetector Microelectronic fabrication (materials and surfaces technology) Nanoparticles Optical device fabrication optical lithography Optoelectronic devices Photodetectors Physics polyvinyl-alcohol (PVA) Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices Sensors (chemical, optical, electrical, movement, gas, etc.) remote sensing Spectra top-down wet-chemical etching Ultraviolet Wavelengths Zinc oxide zinc-oxide (ZnO) nanoparticles
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Beschreibung
Zusammenfassung:	Metal-semiconductor-metal ultraviolet (UV) photodetectors were created with zinc-oxide colloidal nanoparticles coated with polyvinyl-alcohol. Gold-interdigitated finger contacts with different parameters were patterned on the nanoparticles by optical lithography. The photodetectors exhibited UV-photogenerated current to dark current ratios ranging from 3.85 × 10 6 to 1.34 × 10 8 , depending on the finger parameters. The spectral responses demonstrate a 375 nm cutoff wavelength, with a peak responsivity of 731.42 A/W at 345 nm.
ISSN:	0741-3106 1558-0563
DOI:	10.1109/LED.2010.2089598