Advanced Materials, volume 31, issue 33, pages 1901745
Nanostructured Back Reflectors for Efficient Colloidal Quantum‐Dot Infrared Optoelectronics
Se-Woong Baek
1
,
Pau Molet
2
,
Min-Jae Choi
1
,
Margherita Biondi
1
,
Olivier Ouellette
1
,
James Fan
1
,
Sjoerd Hoogland
1
,
F. Pelayo García de Arquer
1
,
Edward H Sargent
1
1
Department of Electrical and Computer EngineeringUniversity of Toronto 10 King's College Road Toronto Ontario M5S 3G4 Canada
|
Publication type: Journal Article
Publication date: 2019-06-21
Journal:
Advanced Materials
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor: 29.4
ISSN: 09359648, 15214095
General Materials Science
Mechanical Engineering
Mechanics of Materials
Abstract
Colloidal quantum dots (CQDs) can be used to extend the response of solar cells, enabling the utilization of solar power that lies to the red of the bandgap of c-Si and perovskites. To achieve largely complete absorption of infrared (IR) photons in CQD solids requires thicknesses on the micrometer range; however, this exceeds the typical diffusion lengths (≈300 nm) of photoexcited charges in these materials. Nanostructured metal back electrodes that grant the cell efficient IR light trapping in thin active layers with no deterioration of the electrical properties are demonstrated. Specifically, a new hole-transport layer (HTL) is developed and directly nanostructured. Firstly, a material set to replace conventional rigid HTLs in CQD devices is developed with a moldable HTL that combines the mechanical and chemical requisites for nanoimprint lithography with the optoelectronic properties necessary to retain efficient charge extraction through an optically thick layer. The new HTL is nanostructured in a 2D lattice and conformally coated with MoO3 /Ag. The photonic structure in the back electrode provides a record photoelectric conversion efficiency of 86%, beyond the Si bandgap, and a 22% higher IR power conversion efficiency compared to the best previous reports.
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1 publication, 2%
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- We do not take into account publications without a DOI.
- Statistics recalculated only for publications connected to researchers, organizations and labs registered on the platform.
- Statistics recalculated weekly.
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Baek S. et al. Nanostructured Back Reflectors for Efficient Colloidal Quantum‐Dot Infrared Optoelectronics // Advanced Materials. 2019. Vol. 31. No. 33. p. 1901745.
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Baek S., Molet P., Choi M., Biondi M., Ouellette O., Fan J., Hoogland S., Pelayo García de Arquer F., Sargent E. H., Sargent E. H. Nanostructured Back Reflectors for Efficient Colloidal Quantum‐Dot Infrared Optoelectronics // Advanced Materials. 2019. Vol. 31. No. 33. p. 1901745.
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TY - JOUR
DO - 10.1002/adma.201901745
UR - https://doi.org/10.1002/adma.201901745
TI - Nanostructured Back Reflectors for Efficient Colloidal Quantum‐Dot Infrared Optoelectronics
T2 - Advanced Materials
AU - Biondi, Margherita
AU - Sargent, Edward H.
AU - Baek, Se-Woong
AU - Molet, Pau
AU - Choi, Min-Jae
AU - Ouellette, Olivier
AU - Fan, James
AU - Hoogland, Sjoerd
AU - Pelayo García de Arquer, F.
AU - Sargent, Edward H
PY - 2019
DA - 2019/06/21 00:00:00
PB - Wiley
SP - 1901745
IS - 33
VL - 31
SN - 0935-9648
SN - 1521-4095
ER -
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@article{2019_Baek,
author = {Margherita Biondi and Edward H. Sargent and Se-Woong Baek and Pau Molet and Min-Jae Choi and Olivier Ouellette and James Fan and Sjoerd Hoogland and F. Pelayo García de Arquer and Edward H Sargent},
title = {Nanostructured Back Reflectors for Efficient Colloidal Quantum‐Dot Infrared Optoelectronics},
journal = {Advanced Materials},
year = {2019},
volume = {31},
publisher = {Wiley},
month = {jun},
url = {https://doi.org/10.1002/adma.201901745},
number = {33},
pages = {1901745},
doi = {10.1002/adma.201901745}
}
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Baek, Se-Woong, et al. “Nanostructured Back Reflectors for Efficient Colloidal Quantum‐Dot Infrared Optoelectronics.” Advanced Materials, vol. 31, no. 33, Jun. 2019, p. 1901745. https://doi.org/10.1002/adma.201901745.