Luminescence and Raman studies of ZnSe/ZnS multiple quantum well structures

✍ Scribed by Th. Weber; H. Stolz; W. von der Osten; Zhao Futan; Shen Yongrong

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 205 KB
• Volume: 13
• Category: Article
• ISSN: 0749-6036
• DOI: 10.1006/spmi.1993.1070

✦ Synopsis

We present luminescence and Raman spectra of (\mathrm{ZnSe} / \mathrm{ZnS}) quantum wells fabricated by metal organic chemical vapour deposition. Our experiments provide information on the structure of the sample interfaces between adjacent layers. Especially LO phonon Raman scattering is found to be sensitive to strain and to the undesired formation of a solid solution between the two compounds. A calculation using a one-dimensional particle-in-box model with finite barriers gives good agreement with the measured exciton energies assuming as fitting parameter a valence band discontinuity of (91 %).