Nonradiative Lifetimes in Intermediate Band Materials - Absence of Lifetime Recovery

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Nonradiative Lifetimes in Intermediate Band Materials - Absence of Lifetime Recovery

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Title: Nonradiative Lifetimes in Intermediate Band Materials - Absence of Lifetime Recovery
Author: Krich, Jacob Jonathan; Halperin, Bertrand I.; Aspuru-Guzik, Alan

Note: Order does not necessarily reflect citation order of authors.

Citation: Krich, Jacob J., Bertrand I. Halperin and Alan Aspuru-Guzik. 2012. Nonradiative lifetimes in intermediate band materials - absence of lifetime recovery. Bulletin of the American Physical Society 57(1): V28.00004.
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Abstract: Intermediate band photovoltaics hold the promise of being highly efficient and cost effective photovoltaic cells. Intermediate states in the band gap, however, are known to facilitate nonradiative recombination. Much effort has been dedicated to producing metallic intermediate bands in hopes of producing lifetime recovery - an increase in carrier lifetime as doping levels increase. We show that lifetime recovery induced by the insulator-to-metal transition will not occur, because the metallic extended states will be localised by phonons during the recombination process. Only trivial forms of lifetime recovery, e.g., from an overall shift in intermediate levels, are possible. Future work in intermediate band photovoltaics must focus on optimizing subgap optical absorption and minimizing recombination, but not via lifetime recovery.
Other Sources: http://arxiv.org/abs/1110.5639
Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:8873147

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  • FAS Scholarly Articles [7374]
    Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University
 
 

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