Optical processes in cadmium sulfide thin films

Thesis/Dissertation · Thu Jan 01 00:00:00 EST 1987

OSTI ID:5211221

Clausen, Jr, E M

Recent results show, as expected by current theoretical thinking, that the nonlinear optical behavior and the exciton and band gap energy configurations of CdS are dependent upon the microstructure of the samples. Since most applications in computer-logic, or communications require waveguide geometries, the object here was the study of thin films. Concern was with the effect of microstructure and preparation conditions on the optical properties of CdS thin films. High optical-quality film were produced by RF magnetron sputtering with a variety of microstructures and crystallographic characteristics controlled by the deposition process and subsequent heat treatments. An in-depth study of the thin film microstructure revealed the relationship between crystallographic defects and band gap defects which lead to band tailing absorption. For the first time, absorption bands and photoluminescence associated with exciton states were observed in a polycrystalline thin film. A supplementary study investigated composite films, consisting of CdS crystals in a glass matrix, formed by a novel co-sputter deposition process, in which alternating layers of CdS and a borosilicate glass were deposited to form a thin film.

• Research Organization: Florida Univ., Gainesville, FL (USA)
• OSTI ID: 5211221
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CADMIUM SULFIDES
THIN FILMS
OPTICS
NONLINEAR PROBLEMS
CHEMICAL VAPOR DEPOSITION
ABSORPTION SPECTRA
EXCITONS
MICROSTRUCTURE
PHOTOLUMINESCENCE
SPUTTERING
CADMIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL COATING
CRYSTAL STRUCTURE
DEPOSITION
FILMS
INORGANIC PHOSPHORS
LUMINESCENCE
PHOSPHORS
QUASI PARTICLES
SPECTRA
SULFIDES
SULFUR COMPOUNDS
SURFACE COATING
360603* - Materials- Properties