Gallium oxide films for filter and solar-blind UV detector

✍ Scribed by Zhenguo Ji; Juan Du; Jia Fan; Wei Wang

• Book ID: 104075125
• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 115 KB
• Volume: 28
• Category: Article
• ISSN: 0925-3467
• DOI: 10.1016/j.optmat.2005.03.006

✦ Synopsis

Gallium oxide thin films were deposited by pulsed spray pyrolysis in air using ethanol solution of gallium trichloride as precursor. X-ray diffraction measurements showed that monoclinic gallium oxide thin films were formed. The optical band-gap of the film deposited on quartz substrates was 5.16 eV, and the transmittance was greater than 80% for k > 275 nm, as determined by UVvis absorption spectrum. Photoconductivity of Ga 2 O 3 film with inter-digital electrodes showed a weak sensitivity to direct sun light, while a very strong sensitivity to 254 nm UV light, which indicating possible applications of b-Ga 2 O 3 in solar-blind UV-detection and deep UV transparent conducting materials.