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Impact of Semiconductor Band Tails and Band Filling on Photovoltaic Efficiency Limits

Wong, Joeson and Omelchenko, Stefan T. and Atwater, Harry A. (2021) Impact of Semiconductor Band Tails and Band Filling on Photovoltaic Efficiency Limits. ACS Energy Letters, 6 (1). pp. 52-57. ISSN 2380-8195. doi:10.1021/acsenergylett.0c02362.

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Since the seminal work of Shockley and Queisser, assessing the detailed balance between absorbed and emitted radiative fluxes from a photovoltaic absorber has been the standard method for evaluating solar cell efficiency limits. The principle of detailed balance is one dictated by reciprocity and steady state, so that photons can be absorbed and emitted with equal probability. This basic principle has also been extended to evaluate the effects of multiple junctions, hot carriers, nanostructured geometries, multiexciton generation, subunity radiative efficiency, and many other solar cell configurations and nonidealities to estimate limiting efficiencies via modifications to the detailed balance model.

Item Type:Article
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URLURL TypeDescription
Wong, Joeson0000-0002-6304-7602
Omelchenko, Stefan T.0000-0003-1104-9291
Atwater, Harry A.0000-0001-9435-0201
Additional Information:© 2020 American Chemical Society. Received: November 10, 2020; Accepted: November 19, 2020; Published: December 2, 2020. This work is part of the “Photonics at Thermodynamic Limits” Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award Number DE-SC0019140. J.W. acknowledges additional support from the National Science Foundation Graduate Research Fellowship under Grant No. 1144469. Author Contributions: J.W. and S.T.O. contributed equally. J.W. and S.T.O. developed the ideas and formulism and performed the calculations for all the results shown in this work. H.A.A supervised all the calculations and analysis. J.W. wrote the manuscript, with input from S.T.O and H.A.A. All authors contributed to the discussion and interpretation of results, as well as the presentation and preparation of the manuscript. Views expressed in this Viewpoint are those of the authors and not necessarily the views of the ACS. The authors declare no competing financial interest.
Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0019140
NSF Graduate Research FellowshipDGE-1144469
Issue or Number:1
Record Number:CaltechAUTHORS:20201204-183141028
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Official Citation:Impact of Semiconductor Band Tails and Band Filling on Photovoltaic Efficiency Limits. Joeson Wong, Stefan T. Omelchenko, and Harry A. Atwater. ACS Energy Letters 2021 6 (1), 52-57; DOI: 10.1021/acsenergylett.0c02362
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:106932
Deposited By: Tony Diaz
Deposited On:07 Dec 2020 18:32
Last Modified:16 Nov 2021 18:58

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