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Quantum size effects for an exciton attached to a spherical quantum dot are calculated by a variational approach. The band lineups are assumed to be type II with finite offsets Vₑ and Vₕ. The dependence of the exciton binding energy upon the dot radius R and the offsets is studied for different sets of electron and hole effective masses.
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Laheld et al. (1995) studied this question.
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