Journal of Electronic Materials

, Volume 47, Issue 8, pp 4325–4331 | Cite as

Theoretical Determination of Optimal Material Parameters for ZnCdTe/ZnCdSe Quantum Dot Intermediate Band Solar Cells

  • C. M. Imperato
  • G. A. Ranepura
  • L. I. Deych
  • I. L. Kuskovsky
Topical Collection: 18th International Conference on II-VI Compounds
Part of the following topical collections:
  1. 18th International Conference on II-VI Compounds and Related Materials


Intermediate band solar cells (IBSCs) are designed to enhance the photovoltaic efficiency significantly over that of a single-junction solar cell as determined by the Shockley–Queisser limit. In this work we present calculations to determine parameters of type-II Zn1−xCdxTe/Zn1−yCdySe quantum dots (QDs) grown on the InP substrate suitable for IBSCs. The calculations are done via the self-consistent variational method, accounting for the disk form of the QDs, presence of the strained ZnSe interfacial layer, and under conditions of a strain-free device structure. We show that to achieve the required parameters relatively thick QDs are required. Barriers must contain Cd concentration in the range of 35–44%, while Cd concentration in QD can vary widely from 0% to 70%, depending on their thickness to achieve the intermediate band energies in the range of 0.50–0.73 eV. It is also shown that the results are weakly dependent on the barrier thickness.


Intermediate band solar cells type-II quantum dots ZnCdSe ZnCdTe self-consistent variational method interfacial layer 


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Copyright information

© The Minerals, Metals & Materials Society 2018

Authors and Affiliations

  • C. M. Imperato
    • 1
  • G. A. Ranepura
    • 1
  • L. I. Deych
    • 1
    • 2
  • I. L. Kuskovsky
    • 1
    • 2
  1. 1.Department of PhysicsQueens College of CUNYQueensUSA
  2. 2.Physics ProgramThe Graduate Center of CUNYNew YorkUSA

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