Abstract
We investigate the effect of excitons on charge transport in photovoltaic materials with large exciton binding energies using Cu2O as a model system. We develop a thermodynamic model to estimate the fraction of excitons in Cu2O 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.
| Original language | English |
|---|---|
| Title of host publication | 2017 IEEE 44th Photovoltaic Specialist Conference, PVSC 2017 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 1-4 |
| Number of pages | 4 |
| ISBN (Electronic) | 9781509056057 |
| DOIs | |
| Publication status | Published - May 25 2018 |
| Event | 44th IEEE Photovoltaic Specialist Conference, PVSC 2017 - Washington, United States Duration: Jun 25 2017 → Jun 30 2017 |
Other
| Other | 44th IEEE Photovoltaic Specialist Conference, PVSC 2017 |
|---|---|
| Country | United States |
| City | Washington |
| Period | 6/25/17 → 6/30/17 |
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ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Electrical and Electronic Engineering
- Electronic, Optical and Magnetic Materials
Cite this
Excitonic effects in photovoltaic materials with large exciton binding energies. / Omelchenko, Stefan T.; Tolstova, Yulia; Atwater, Harry A.; Lewis, Nathan S.
2017 IEEE 44th Photovoltaic Specialist Conference, PVSC 2017. Institute of Electrical and Electronics Engineers Inc., 2018. p. 1-4.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
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TY - GEN
T1 - Excitonic effects in photovoltaic materials with large exciton binding energies
AU - Omelchenko, Stefan T.
AU - Tolstova, Yulia
AU - Atwater, Harry A.
AU - Lewis, Nathan S
PY - 2018/5/25
Y1 - 2018/5/25
N2 - We investigate the effect of excitons on charge transport in photovoltaic materials with large exciton binding energies using Cu2O as a model system. We develop a thermodynamic model to estimate the fraction of excitons in Cu2O 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.
AB - We investigate the effect of excitons on charge transport in photovoltaic materials with large exciton binding energies using Cu2O as a model system. We develop a thermodynamic model to estimate the fraction of excitons in Cu2O 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.
UR - http://www.scopus.com/inward/record.url?scp=85048509365&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85048509365&partnerID=8YFLogxK
U2 - 10.1109/PVSC.2017.8366860
DO - 10.1109/PVSC.2017.8366860
M3 - Conference contribution
SP - 1
EP - 4
BT - 2017 IEEE 44th Photovoltaic Specialist Conference, PVSC 2017
PB - Institute of Electrical and Electronics Engineers Inc.
ER -