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Intrawell and interwell phonon-excitons in a CdS/CdSe/CdS asymmetric quantum well

Chemical Physics Letters, ISSN: 0009-2614, Vol: 779, Page: 138848
2021
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Binding energies of intrawell and interwell excitons are studied in the CdS/CdSe/CdS asymmetric quantum well by varying right well sizes under polaronic effect. The transition energy, transition life time, oscillator strength and absorption coefficients are measured. The above properties are obtained in the influence of image charge potential included in the Hamiltonian. The optical absorption coefficients with the function of incoming photon energy are obtained. The results bring out that the peak of absorption coefficient is larger for the direct exciton than for the indirect exciton and the radiative lifetime for the indirect exciton is found to be higher.

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