Omelchenko, Stefan T. and Tolstova, Yulia and Atwater, Harry A. and Lewis, Nathan S. (2016) Excitonic effects in photovoltaic materials with large exciton binding energies. In: IEEE 43rd Photovoltaic Specialists Conference. IEEE , Piscataway, NJ, pp. 3616-3619. ISBN 978-1-5090-2724-8. https://resolver.caltech.edu/CaltechAUTHORS:20161128-152532394
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Abstract
We investigate the effect of excitons on charge transport in photovoltaic materials with large exciton binding energies using Cu_2O as a model system. We develop a thermodynamic model to estimate the fraction of excitons in Cu_2O at quasi-equilibrium and find that over 20% of the generated population of carriers during photovoltaic operation could be excitons. Experiments show the presence of excitons at room temperature under visible light excitation and current collection due to excitons during device operation. This work demonstrates that excitons can play a fundamental role in photovoltaic materials with large exciton binding energies and lays the foundation for further studies.
| Item Type: | Book Section | |||||||||
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| Additional Information: | © 2016 IEEE. | |||||||||
| Group: | JCAP | |||||||||
| Subject Keywords: | Excitons, Photovoltaic systems, Photoluminescence, Photonic band gap, Photovoltaic cells | |||||||||
| DOI: | 10.1109/PVSC.2016.7750347 | |||||||||
| Record Number: | CaltechAUTHORS:20161128-152532394 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20161128-152532394 | |||||||||
| Official Citation: | S. T. Omelchenko, Y. Tolstova, H. A. Atwater and N. S. Lewis, "Excitonic effects in photovoltaic materials with large exciton binding energies," 2016 IEEE 43rd Photovoltaic Specialists Conference (PVSC), Portland, OR, USA, 2016, pp. 3616-3619. doi: 10.1109/PVSC.2016.7750347 URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7750347&isnumber=7749395 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 72342 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | Tony Diaz | |||||||||
| Deposited On: | 28 Nov 2016 23:51 | |||||||||
| Last Modified: | 11 Nov 2021 05:00 |
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