Micron Thick Colloidal Quantum Dot Solids

James Z. Fan; Maral Vafaie; Koen Bertens; Mykhailo Sytnyk; Joao M. Pina; Laxmi Kishore Sagar; Olivier Ouellette; Andrew H. Proppe; Armin Sedighian Rasouli; Yajun Gao; Se-Woong Baek; Bin Chen; Frédéric Laquai; Sjoerd Hoogland; F Pelayo García de Arquer; Wolfgang Heiss; E. Sargent

doi:10.1021/acs.nanolett.0c01614

Micron Thick Colloidal Quantum Dot Solids

James Z. Fan, Maral Vafaie, Koen Bertens, Mykhailo Sytnyk, Joao M. Pina, Laxmi Kishore Sagar, Olivier Ouellette, Andrew H. Proppe, Armin Sedighian Rasouli, Yajun Gao, Se-Woong Baek, Bin Chen, Frédéric Laquai, Sjoerd Hoogland, F Pelayo García de Arquer, Wolfgang Heiss, E. Sargent

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54 Scopus citations

Abstract

Shortwave infrared colloidal quantum dots (SWIRCQDs) are semiconductors capable of harvesting across the AM1.5G solar spectrum. Today’s SWIR-CQD solar cells rely on spin-coating; however, these films exhibit cracking once thickness exceeds ∼500 nm. We posited that a blade-coating strategy could enable thick QD films. We developed a ligand exchange with an additional resolvation step that enabled the dispersion of SWIRCQDs. We then engineered a quaternary ink that combined highviscosity solvents with short QD stabilizing ligands. This ink, bladecoated over a mild heating bed, formed micron-thick SWIR-CQD films. These SWIR-CQD solar cells achieved short-circuit current densities (Jsc) that reach 39 mA cm−2 , corresponding to the harvest of 60% of total photons incident under AM1.5G illumination. External quantum efficiency measurements reveal both the first exciton peak and the closest Fabry−Perot resonance peak reaching approximately 80%this is the highest unbiased EQE reported beyond 1400 nm in a solution-processed semiconductor.

Original language	English (US)
Journal	Nano Letters
DOIs	https://doi.org/10.1021/acs.nanolett.0c01614
State	Published - Jun 16 2020

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10.1021/acs.nanolett.0c01614

https://repository.kaust.edu.sa/bitstream/10754/663783/2/blade_PDF_Proof_MS%20%281%29.pdf

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@article{c6089bcef3f24fa28cd490ccf930206c,

title = "Micron Thick Colloidal Quantum Dot Solids",

abstract = "Shortwave infrared colloidal quantum dots (SWIRCQDs) are semiconductors capable of harvesting across the AM1.5G solar spectrum. Today{\textquoteright}s SWIR-CQD solar cells rely on spin-coating; however, these films exhibit cracking once thickness exceeds ∼500 nm. We posited that a blade-coating strategy could enable thick QD films. We developed a ligand exchange with an additional resolvation step that enabled the dispersion of SWIRCQDs. We then engineered a quaternary ink that combined highviscosity solvents with short QD stabilizing ligands. This ink, bladecoated over a mild heating bed, formed micron-thick SWIR-CQD films. These SWIR-CQD solar cells achieved short-circuit current densities (Jsc) that reach 39 mA cm−2 , corresponding to the harvest of 60% of total photons incident under AM1.5G illumination. External quantum efficiency measurements reveal both the first exciton peak and the closest Fabry−Perot resonance peak reaching approximately 80%this is the highest unbiased EQE reported beyond 1400 nm in a solution-processed semiconductor.",

author = "Fan, {James Z.} and Maral Vafaie and Koen Bertens and Mykhailo Sytnyk and Pina, {Joao M.} and Sagar, {Laxmi Kishore} and Olivier Ouellette and Proppe, {Andrew H.} and Rasouli, {Armin Sedighian} and Yajun Gao and Se-Woong Baek and Bin Chen and Fr{\'e}d{\'e}ric Laquai and Sjoerd Hoogland and {Garc{\'i}a de Arquer}, {F Pelayo} and Wolfgang Heiss and E. Sargent",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledged KAUST grant number(s): CRG2018-3737. Acknowledgements: The authors thank L. Levina, E. Palmiano, R. Wolowiec, and D. Kopilovic for their assistance during the period of study. The authors also thank the members of QD Solar for their assistance and discussions during the period of study: V. Tran, T. Vo, T. Gibbs, M. Labine, A. MacDonald, E. Mosaferi, R. Quintero-Bermudez, and A. Fisher.",

year = "2020",

month = jun,

day = "16",

doi = "10.1021/acs.nanolett.0c01614",

language = "English (US)",

journal = "Nano Letters",

issn = "1530-6984",

publisher = "American Chemical Society",

}

TY - JOUR

T1 - Micron Thick Colloidal Quantum Dot Solids

AU - Fan, James Z.

AU - Vafaie, Maral

AU - Bertens, Koen

AU - Sytnyk, Mykhailo

AU - Pina, Joao M.

AU - Sagar, Laxmi Kishore

AU - Ouellette, Olivier

AU - Proppe, Andrew H.

AU - Rasouli, Armin Sedighian

AU - Gao, Yajun

AU - Baek, Se-Woong

AU - Chen, Bin

AU - Laquai, Frédéric

AU - Hoogland, Sjoerd

AU - García de Arquer, F Pelayo

AU - Heiss, Wolfgang

AU - Sargent, E.

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledged KAUST grant number(s): CRG2018-3737. Acknowledgements: The authors thank L. Levina, E. Palmiano, R. Wolowiec, and D. Kopilovic for their assistance during the period of study. The authors also thank the members of QD Solar for their assistance and discussions during the period of study: V. Tran, T. Vo, T. Gibbs, M. Labine, A. MacDonald, E. Mosaferi, R. Quintero-Bermudez, and A. Fisher.

PY - 2020/6/16

Y1 - 2020/6/16

N2 - Shortwave infrared colloidal quantum dots (SWIRCQDs) are semiconductors capable of harvesting across the AM1.5G solar spectrum. Today’s SWIR-CQD solar cells rely on spin-coating; however, these films exhibit cracking once thickness exceeds ∼500 nm. We posited that a blade-coating strategy could enable thick QD films. We developed a ligand exchange with an additional resolvation step that enabled the dispersion of SWIRCQDs. We then engineered a quaternary ink that combined highviscosity solvents with short QD stabilizing ligands. This ink, bladecoated over a mild heating bed, formed micron-thick SWIR-CQD films. These SWIR-CQD solar cells achieved short-circuit current densities (Jsc) that reach 39 mA cm−2 , corresponding to the harvest of 60% of total photons incident under AM1.5G illumination. External quantum efficiency measurements reveal both the first exciton peak and the closest Fabry−Perot resonance peak reaching approximately 80%this is the highest unbiased EQE reported beyond 1400 nm in a solution-processed semiconductor.

AB - Shortwave infrared colloidal quantum dots (SWIRCQDs) are semiconductors capable of harvesting across the AM1.5G solar spectrum. Today’s SWIR-CQD solar cells rely on spin-coating; however, these films exhibit cracking once thickness exceeds ∼500 nm. We posited that a blade-coating strategy could enable thick QD films. We developed a ligand exchange with an additional resolvation step that enabled the dispersion of SWIRCQDs. We then engineered a quaternary ink that combined highviscosity solvents with short QD stabilizing ligands. This ink, bladecoated over a mild heating bed, formed micron-thick SWIR-CQD films. These SWIR-CQD solar cells achieved short-circuit current densities (Jsc) that reach 39 mA cm−2 , corresponding to the harvest of 60% of total photons incident under AM1.5G illumination. External quantum efficiency measurements reveal both the first exciton peak and the closest Fabry−Perot resonance peak reaching approximately 80%this is the highest unbiased EQE reported beyond 1400 nm in a solution-processed semiconductor.

UR - http://hdl.handle.net/10754/663783

UR - https://pubs.acs.org/doi/10.1021/acs.nanolett.0c01614

U2 - 10.1021/acs.nanolett.0c01614

DO - 10.1021/acs.nanolett.0c01614

M3 - Article

C2 - 32543860

SN - 1530-6984

JO - Nano Letters

JF - Nano Letters

ER -

Micron Thick Colloidal Quantum Dot Solids

Abstract

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