Composition dependent Raman scattering of ZnSe1−xOx

• Published in: Solid state communications Vol. 172; pp. 20 - 23
• Main Authors: Cheng, C.-C., Chen, W.-Y., Ke, H.-H., Chen, C.-Y., Chyi, J.-I., Hsu, T.M.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.10.2013; Elsevier
• Subjects: A. ZnSeO; Condensed matter: electronic structure, electrical, magnetic, and optical properties; E. Raman spectroscopy; Exact sciences and technology; Infrared and raman spectra and scattering; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Physics; E. Raman spectroscopy; A. ZnSeO; Optical phonons; Oxygen additions; Raman spectra; Energy gap; Impurity density; Resonance Raman scattering; II-VI semiconductors; Multi-phonon processes; Zinc selenides
• ISSN: 0038-1098; 1879-2766
• DOI: 10.1016/j.ssc.2013.08.010

This paper presents the results of Raman scattering studies of ZnSe1−xOx with an oxygen composition ranging from x=0% to 12% at room temperature. Optical phonons were identified and analyzed from alloys with a varying amount of oxygen in their composition. An enhancement of the multi-phonon signal was found in samples with a higher oxygen composition. This is attributed to resonance Raman scattering caused by the reduction in the band gap. Experiments results are discussed with reference to the photoluminescence and piezoreflectance spectra. •The phonon properties of ZnSe1−xOx were studied using Raman scattering spectroscopes.•Finding an enhancement of multi-phonon signal at higher oxygen compositions.•The resonance Raman scattering is attributed to the band gap reduction of ZnSe1−xOx.•We use BAC model to examine band gap reduction up to x=12%.