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 | 2016 IEEE 43rd Photovoltaic Specialists Conference, PVSC 2016 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 3616-3619 |
| Number of pages | 4 |
| Volume | 2016-November |
| ISBN (Electronic) | 9781509027248 |
| DOIs | |
| Publication status | Published - Nov 18 2016 |
| Event | 43rd IEEE Photovoltaic Specialists Conference, PVSC 2016 - Portland, United States Duration: Jun 5 2016 → Jun 10 2016 |
Other
| Other | 43rd IEEE Photovoltaic Specialists Conference, PVSC 2016 |
|---|---|
| Country | United States |
| City | Portland |
| Period | 6/5/16 → 6/10/16 |
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ASJC Scopus subject areas
- Control and Systems Engineering
- Industrial and Manufacturing Engineering
- Electrical and Electronic Engineering
Cite this
Excitonic effects in photovoltaic materials with large exciton binding energies. / Omelchenko, Stefan T.; Tolstova, Yulia; Atwater, Harry A.; Lewis, Nathan S.
2016 IEEE 43rd Photovoltaic Specialists Conference, PVSC 2016. Vol. 2016-November Institute of Electrical and Electronics Engineers Inc., 2016. p. 3616-3619 7750347.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
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 - 2016/11/18
Y1 - 2016/11/18
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=85003671266&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85003671266&partnerID=8YFLogxK
U2 - 10.1109/PVSC.2016.7750347
DO - 10.1109/PVSC.2016.7750347
M3 - Conference contribution
AN - SCOPUS:85003671266
VL - 2016-November
SP - 3616
EP - 3619
BT - 2016 IEEE 43rd Photovoltaic Specialists Conference, PVSC 2016
PB - Institute of Electrical and Electronics Engineers Inc.
ER -