Journal of Physical Studies 14(3), Article 3704 [4 pages] (2010) DOI: https://doi.org/10.30970/jps.14.3704 THE EFFECT OF DIELECTRIC CONFINEMENT ON EXCITON BINDING ENERGIES IN CdS/MgS SINGLE QUANTUM WELLS Chikara Onodera1, Masaaki Yoshida2 1Electronic Engineering Course, Aomori Prefectural Towada Technical Senior High School, 215-1 Shimotai Sanbongi, Towada, Aomori 034-0001, Japan ycd1ngt@yahoo.co.jp 2Department of Electrical and Computer Engineering, Hachinohe National College of Technology, 16-1 Uwanotai, Tamonoki, Hachinohe, Aomori 039-1192, Japan yoshida-e@hachinohe-ct.ac.jp

Binding energies of heavy- and light-hole excitons in CdS/MgS single quantum wells (SQWs) are calculated by considering the effect of dielectric confinement (image charge effect). The increase in maximum heavy-hole (light-hole) exciton binding energy calculated by considering the image charge effect is 7.7 meV (5.9 meV). When the well width of the CdS/MgS SQWs is in the range of 0.5 nm-4.0 nm the heavy- and light-hole exciton binding energies calculated by considering the image charge effect are larger than the longitudinal optical phonon energy of CdS.

PACS number(s): 73.21.Fg, 78.20.Bh, 81.05.Dz

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