Photodarkening Effect in a-(GaSe){sub 90}Ag{sub 10} Thin Films

Journal Article · Mon Dec 12 00:00:00 EST 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3653701· OSTI ID:21612352

Gupta, Shikha; Mustafa, F I; Saini, G S. S.; Goyal, Navdeep; Tripathi, S K ^[1]

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1. Department of Physics, Panjab University, Chandigarh-160 014 (India)

The present paper reports the laser induced changes on the optical properties of a-(GaSe){sub 90}Ag{sub 10} thin films prepared by thermal evaporation technique. Thin film samples, on glass substrate, were exposed to laser light of wavelength {lambda} = 532 nm for different exposure times, t{sub E}(t{sub E}=0{sub s}, 500 s, 1000 s and 3000 s). Optical parameters like absorption coefficient and optical energy gap of as- deposited thin film and their laser induced changes were studied at three different times of exposure. The value of absorption coefficient of these thin film increases on exposing the film to laser irradiation. The optical absorption edge shift to lower photon energy i.e. the Photodarkening (PD) effect occurs. The results have been explained on the basis of structural changes that are occurring after the laser irradiation.

• OSTI ID: 21612352
• Journal Information: AIP Conference Proceedings, Vol. 1393, Issue 1; Conference: ICACNM-2011: International conference on advances in condensed and nano materials, Chandigarh (India), 23-26 Feb 2011; Other Information: DOI: 10.1063/1.3653701; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
ABSORPTION
DEPOSITION
ENERGY GAP
EVAPORATION
GALLIUM SELENIDES
GLASS
LASER RADIATION
OPTICAL PROPERTIES
PHOTONS
PHYSICAL RADIATION EFFECTS
SILVER COMPOUNDS
SUBSTRATES
THIN FILMS
VISIBLE RADIATION
BOSONS
CHALCOGENIDES
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
FILMS
GALLIUM COMPOUNDS
MASSLESS PARTICLES
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
RADIATION EFFECTS
RADIATIONS
SELENIDES
SELENIUM COMPOUNDS
SORPTION
TRANSITION ELEMENT COMPOUNDS