Determination of the optimum material parameters for intermediate band solar cells using diffusion model

NAVRUZ T. S. , Saritas M.

PROGRESS IN PHOTOVOLTAICS, vol.22, no.5, pp.593-602, 2014 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 22 Issue: 5
  • Publication Date: 2014
  • Doi Number: 10.1002/pip.2283
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.593-602
  • Keywords: diffusion model, overlap, intermediate band solar cell, EFFICIENCY, OVERLAP


In this study, the optimum material parameters capable of providing high efficiencies close to the detailed balance limit are determined for intermediate band solar cells. A diffusion model, including the overlap effect between absorption coefficients, is used during the calculations for the first time. It is obtained that to achieve high efficiencies close to the detailed balance limit; the effective density of state value, N-CV, should be higher than 10(17) cm(-3) and the carrier mobility should be larger than 200 cm(2)/Vs, where the light concentration should not be higher than nearly 1000 sun. Besides, it is found out that the optimum intermediate band level and the base width depend on the mobility and effective density of state values. So they need to be optimized according to the material parameters. The effect of overlap between absorption coefficients on the performance of intermediate band solar cells is also investigated. Copyright (c) 2012 John Wiley & Sons, Ltd.