Detailed balance model for intermediate band solar cells with photon conservation

Chien-Chung Lin*, Wei Ling Liu, Ching Yu Shih

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


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.

Original languageEnglish
Pages (from-to)16927-16933
Number of pages7
JournalOptics Express
Issue number18
StatePublished - 29 Aug 2011

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