Excitonic effects in photovoltaic materials with large exciton binding energies

Stefan T. Omelchenko; Yulia Tolstova; Harry A. Atwater; Nathan S. Lewis

doi:10.1109/PVSC.2016.7750347

Excitonic effects in photovoltaic materials with large exciton binding energies

Stefan T. Omelchenko, Yulia Tolstova, Harry A. Atwater, Nathan S. Lewis

California Institute of Technology

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Citation (Scopus)

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	https://doi.org/10.1109/PVSC.2016.7750347
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

ASJC Scopus subject areas

Control and Systems Engineering
Industrial and Manufacturing Engineering
Electrical and Electronic Engineering

Access to Document

10.1109/PVSC.2016.7750347

Fingerprint Dive into the research topics of 'Excitonic effects in photovoltaic materials with large exciton binding energies'. Together they form a unique fingerprint.

Cite this

Omelchenko, S. T., Tolstova, Y., Atwater, H. A., & Lewis, N. S. (2016). Excitonic effects in photovoltaic materials with large exciton binding energies. In 2016 IEEE 43rd Photovoltaic Specialists Conference, PVSC 2016 (Vol. 2016-November, pp. 3616-3619). [7750347] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PVSC.2016.7750347

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

Omelchenko, ST, Tolstova, Y, Atwater, HA & Lewis, NS 2016, Excitonic effects in photovoltaic materials with large exciton binding energies. in 2016 IEEE 43rd Photovoltaic Specialists Conference, PVSC 2016. vol. 2016-November, 7750347, Institute of Electrical and Electronics Engineers Inc., pp. 3616-3619, 43rd IEEE Photovoltaic Specialists Conference, PVSC 2016, Portland, United States, 6/5/16. https://doi.org/10.1109/PVSC.2016.7750347

@inproceedings{3c5e7ffc9db04f3e96dac153b7f4a5d8,

title = "Excitonic effects in photovoltaic materials with large exciton binding energies",

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.",

author = "Omelchenko, {Stefan T.} and Yulia Tolstova and Atwater, {Harry A.} and Lewis, {Nathan S.}",

year = "2016",

month = nov,

day = "18",

doi = "10.1109/PVSC.2016.7750347",

language = "English",

volume = "2016-November",

pages = "3616--3619",

booktitle = "2016 IEEE 43rd Photovoltaic Specialists Conference, PVSC 2016",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

note = "43rd IEEE Photovoltaic Specialists Conference, PVSC 2016 ; Conference date: 05-06-2016 Through 10-06-2016",

}

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.

T2 - 43rd IEEE Photovoltaic Specialists Conference, PVSC 2016

Y2 - 5 June 2016 through 10 June 2016

ER -