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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 18 — Aug. 29, 2011
  • pp: 16927–16933

Detailed balance model for intermediate band solar cells with photon conservation

Chien-chung Lin, Wei-Ling Liu, and Ching-Yu Shih  »View Author Affiliations

Optics Express, Vol. 19, Issue 18, pp. 16927-16933 (2011)

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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.

© 2011 OSA

OCIS Codes
(040.5350) Detectors : Photovoltaic
(350.6050) Other areas of optics : Solar energy
(250.5590) Optoelectronics : Quantum-well, -wire and -dot devices

ToC Category:
Solar Energy

Original Manuscript: June 21, 2011
Revised Manuscript: July 28, 2011
Manuscript Accepted: August 8, 2011
Published: August 15, 2011

Chien-chung Lin, Wei-Ling Liu, and Ching-Yu Shih, "Detailed balance model for intermediate band solar cells with photon conservation," Opt. Express 19, 16927-16933 (2011)

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