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Determination of the optimum material parameters for intermediate band solar cells using diffusion model
Author(s) -
Navruz Tugba Selcen,
Saritas Muzeyyen
Publication year - 2014
Publication title -
progress in photovoltaics: research and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.286
H-Index - 131
eISSN - 1099-159X
pISSN - 1062-7995
DOI - 10.1002/pip.2283
Subject(s) - diffusion , detailed balance , limit (mathematics) , absorption (acoustics) , base (topology) , materials science , computational physics , analytical chemistry (journal) , thermodynamics , chemistry , physics , mathematics , mathematical analysis , composite material , chromatography
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 © 2012 John Wiley & Sons, Ltd.