Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5458243 | Journal of Alloys and Compounds | 2017 | 8 Pages |
Abstract
Copper gallium selenide (CGS) semiconductor thin films are suitable for various optoelectronic devices due to their stoichiometry dependent properties. Tuning of electrical conductivity (0.5-90Â S/cm) by compositional variations of CGS thin films prepared by reactive evaporation of the three elements under vacuum is presented here. This p-type absorber material withstands its conductivity type over the entire range of compositional variation. The structure, morphology, elemental composition, chemical states, electrical and optical properties of the thin films are characterized using techniques like X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, UV-visible absorption spectroscopy and Hall effect measurements. Optical studies of the films reveal a three-fold absorption from which crystal field splitting â¼0.06Â eV and spin orbit splitting â¼0.09-0.17Â eV are determined. The optical fundamental absorption edges of the films vary from 1.6 to 1.67Â eV.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Anitha Abraham, Keerthi K., Shaji S., Uday Deshpande, Rachel Reena Philip,