Detailed balance model for intermediate band solar cells with photon conservation | Zendy

ChienChung Lin | Zendy; Wei-Ling Liu | Zendy; Ching-Yu Shih | Zendy

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Detailed balance model for intermediate band solar cells with photon conservation

Author(s) -

ChienChung Lin,

Wei-Ling Liu,

Ching-Yu Shih

Publication year - 2011

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.19.016927

Subject(s) - detailed balance , photon , solar cell , photovoltaic system , physics , spontaneous emission , band gap , solar cell efficiency , optoelectronics , radiative transfer , optics , materials science , ecology , laser , biology , quantum mechanics

We developed a comprehensive detailed balance model of intermediate band solar cell (IBSC). The key feature of our model is based on the conservation of photons in solar spectrum. Together with parametric analysis of carrier partition, we calculated the power conversion efficiency and found an enhancement of 1.5 times in wide band gap material IBSC (such as GaN). On the other hand, this model can also explain the inferior performance of GaAs-based IBSC through the degradation of open-circuit voltages, which can be attributed to the strong non-radiative recombination and the increased photo-generated carriers. The resulting maximum efficiency is complied with the classical Shockley-Queisser limit, and should be considered for the future IBSC design.

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