title: Development of solar-blind photodetectors based on Si-implanted β-Ga(2)O(3).
abstract: β-Ga(2)O(3) films grown on Al(2)O(3) by a metalorganic chemical vapor deposition technique were used to fabricate a solar-blind photodetector with a planar photoconductor structure. The crystal structure and quality of the β-Ga(2)O(3) films were analyzed using X-ray diffraction and micro-Raman spectroscopy. Si ions were introduced into the β-Ga(2)O(3) thin films by ion implantation method and activated by an annealing process to form an Ohmic contact between the Ti/Au electrode and the β-Ga(2)O(3) film. The electrical conductivity of the β-Ga(2)O(3) films was greatly improved by the implantation and subsequent activation of the Si ions. The photoresponse properties of the photodetectors were investigated by analyzing the current-voltage characteristics and the time-dependent photoresponse curves. The fabricated solar-blind photodetectors exhibited photoresponse to 254 nm wavelength, and blindness to 365 nm light, with a high spectral selectivity.
authors.forename: Sooyeoun
authors.initials: S
authors.lastname: Oh
authors.forename: Younghun
authors.initials: Y
authors.lastname: Jung
authors.forename: Michael A
authors.initials: MA
authors.lastname: Mastro
authors.forename: Jennifer K
authors.initials: JK
authors.lastname: Hite
authors.forename: Charles R
authors.initials: CR
authors.lastname: Eddy
authors.forename: Jihyun
authors.initials: J
authors.lastname: Kim