ACS Nano, volume 9, issue 9, pages 8833-8842

Infrared Colloidal Quantum Dot PhotovoltaicsviaCoupling Enhancement and Agglomeration Suppression

Alex Ip 1
Amirreza Kiani 1
Illan J Kramer 1
Hamidreza F Movahed 1
Larissa Levina 1
Michael M Adachi 1
Edward H Sargent 1
1
 
Department of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Ontario M5S 3G4, Canada
Publication typeJournal Article
Publication date2015-08-19
Journal: ACS Nano
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor17.1
ISSN19360851, 1936086X
General Physics and Astronomy
General Materials Science
General Engineering
Abstract
Materials optimized for single-junction solar spectral harvesting, such as silicon, perovskites, and large-band-gap colloidal quantum dot solids, fail to absorb the considerable infrared spectral energy that lies below their respective band gap. Here we explore through modeling and experiment the potential for colloidal quantum dots (CQDs) to augment the performance of solar cells by harnessing transmitted light in the infrared. Through detailed balance modeling, we identify the CQD band gap that is best able to augment wafer-based, thin-film, and also solution-processed photovoltaic (PV) materials. The required quantum dots, with an excitonic peak at 1.3 μm, have not previously been studied in depth for solar performance. Using computational studies we find that a new ligand scheme distinct from that employed in better-explored 0.95 μm band gap PbS CQDs is necessary; only via the solution-phase application of a short bromothiol can we prevent dot fusion during ensuing solid-state film treatments and simultaneously offer a high valence band-edge density of states to enhance hole transport. Photoluminescence spectra and transient studies confirm the desired narrowed emission peaks and reduced surface-trap-associated decay. Electronic characterization reveals that only through the use of the bromothiol ligands is strong hole transport retained. The films, when used to make PV devices, achieve the highest AM1.5 power conversion efficiency yet reported in a solution-processed material having a sub-1 eV band gap.

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Ip A. et al. Infrared Colloidal Quantum Dot PhotovoltaicsviaCoupling Enhancement and Agglomeration Suppression // ACS Nano. 2015. Vol. 9. No. 9. pp. 8833-8842.
GOST all authors (up to 50) Copy
Ip A., Kiani A., Kramer I. J., Voznyy O., Movahed H. F., Levina L., Adachi M. M., Hoogland S., Sargent E. H. Infrared Colloidal Quantum Dot PhotovoltaicsviaCoupling Enhancement and Agglomeration Suppression // ACS Nano. 2015. Vol. 9. No. 9. pp. 8833-8842.
RIS |
Cite this
RIS Copy
TY - JOUR
DO - 10.1021/acsnano.5b02164
UR - https://doi.org/10.1021/acsnano.5b02164
TI - Infrared Colloidal Quantum Dot PhotovoltaicsviaCoupling Enhancement and Agglomeration Suppression
T2 - ACS Nano
AU - Kiani, Amirreza
AU - Movahed, Hamidreza F
AU - Levina, Larissa
AU - Adachi, Michael M
AU - Ip, Alex
AU - Kramer, Illan J
AU - Voznyy, Oleksandr
AU - Hoogland, Sjoerd
AU - Sargent, Edward H
PY - 2015
DA - 2015/08/19 00:00:00
PB - American Chemical Society (ACS)
SP - 8833-8842
IS - 9
VL - 9
SN - 1936-0851
SN - 1936-086X
ER -
BibTex |
Cite this
BibTex Copy
@article{2015_Ip,
author = {Amirreza Kiani and Hamidreza F Movahed and Larissa Levina and Michael M Adachi and Alex Ip and Illan J Kramer and Oleksandr Voznyy and Sjoerd Hoogland and Edward H Sargent},
title = {Infrared Colloidal Quantum Dot PhotovoltaicsviaCoupling Enhancement and Agglomeration Suppression},
journal = {ACS Nano},
year = {2015},
volume = {9},
publisher = {American Chemical Society (ACS)},
month = {aug},
url = {https://doi.org/10.1021/acsnano.5b02164},
number = {9},
pages = {8833--8842},
doi = {10.1021/acsnano.5b02164}
}
MLA
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MLA Copy
Ip, Alex, et al. “Infrared Colloidal Quantum Dot PhotovoltaicsviaCoupling Enhancement and Agglomeration Suppression.” ACS Nano, vol. 9, no. 9, Aug. 2015, pp. 8833-8842. https://doi.org/10.1021/acsnano.5b02164.
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