Enhanced Open-Circuit Voltage in Colloidal Quantum Dot Photovoltaics via Reactivity-Controlled Solution-Phase Ligand Exchange

Jea Woong Jo; Younghoon Kim; Jongmin Choi; F. Pelayo García de Arquer; Grant Walters; Bin Sun; Olivier Ouellette; Junghwan Kim; Andrew H. Proppe; Rafael Quintero-Bermudez; James Fan; Jixian Xu; Chih Shan Tan; Oleksandr Voznyy; Edward H. Sargent

doi:10.1002/adma.201703627

Enhanced Open-Circuit Voltage in Colloidal Quantum Dot Photovoltaics via Reactivity-Controlled Solution-Phase Ligand Exchange

Jea Woong Jo, Younghoon Kim, Jongmin Choi, F. Pelayo García de Arquer, Grant Walters, Bin Sun, Olivier Ouellette, Junghwan Kim, Andrew H. Proppe, Rafael Quintero-Bermudez, James Fan, Jixian Xu, Chih Shan Tan, Oleksandr Voznyy, Edward H. Sargent

Research output: Contribution to journal › Article › peer-review

59 Scopus citations

Abstract

The energy disorder that arises from colloidal quantum dot (CQD) polydispersity limits the open-circuit voltage (VOC) and efficiency of CQD photovoltaics. This energy broadening is significantly deteriorated today during CQD ligand exchange and film assembly. Here, a new solution-phase ligand exchange that, via judicious incorporation of reactivity-engineered additives, provides improved monodispersity in final CQD films is reported. It has been found that increasing the concentration of the less reactive species prevents CQD fusion and etching. As a result, CQD solar cells with a VOC of 0.7 V (vs 0.61 V for the control) for CQD films with exciton peak at 1.28 eV and a power conversion efficiency of 10.9% (vs 10.1% for the control) is achieved.

Original language	English (US)
Pages (from-to)	1703627
Journal	Advanced Materials
Volume	29
Issue number	43
DOIs	https://doi.org/10.1002/adma.201703627
State	Published - Oct 9 2017
Externally published	Yes

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): OSR-2017-CPF-3325
Acknowledgements: J.W.J., Y.K., and J.C. contributed equally to this work. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (NRF-2016R1A6A3A03007170 and 2016R1A6A3A03009820), by Ontario Research Fund-Research Excellence program (ORF7-Ministry of Research and Innovation, Ontario Research Fund-Research Excellence Round 7), by King Abdullah University of Science and Technology (KAUST, Office of Sponsored Research (OSR), Award No. OSR-2017-CPF-3325), and by the Natural Sciences and Engineering Research Council (NSERC) of Canada. O.O. was financially supported by NSERC’s Postgraduate Scholarships-Doctoral program. The authors thank L. Levina, R. Wolowiec, D. Kopilovic, and E. Palmiano for their help over the course of this research.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

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10.1002/adma.201703627

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Jo, J. W., Kim, Y., Choi, J., de Arquer, F. P. G., Walters, G., Sun, B., Ouellette, O., Kim, J., Proppe, A. H., Quintero-Bermudez, R., Fan, J., Xu, J., Tan, C. S., Voznyy, O., & Sargent, E. H. (2017). Enhanced Open-Circuit Voltage in Colloidal Quantum Dot Photovoltaics via Reactivity-Controlled Solution-Phase Ligand Exchange. Advanced Materials, 29(43), 1703627. https://doi.org/10.1002/adma.201703627

@article{102da0f2637d42c1b94f9d56978ed219,

title = "Enhanced Open-Circuit Voltage in Colloidal Quantum Dot Photovoltaics via Reactivity-Controlled Solution-Phase Ligand Exchange",

abstract = "The energy disorder that arises from colloidal quantum dot (CQD) polydispersity limits the open-circuit voltage (VOC) and efficiency of CQD photovoltaics. This energy broadening is significantly deteriorated today during CQD ligand exchange and film assembly. Here, a new solution-phase ligand exchange that, via judicious incorporation of reactivity-engineered additives, provides improved monodispersity in final CQD films is reported. It has been found that increasing the concentration of the less reactive species prevents CQD fusion and etching. As a result, CQD solar cells with a VOC of 0.7 V (vs 0.61 V for the control) for CQD films with exciton peak at 1.28 eV and a power conversion efficiency of 10.9% (vs 10.1% for the control) is achieved.",

author = "Jo, {Jea Woong} and Younghoon Kim and Jongmin Choi and {de Arquer}, {F. Pelayo Garc{\'i}a} and Grant Walters and Bin Sun and Olivier Ouellette and Junghwan Kim and Proppe, {Andrew H.} and Rafael Quintero-Bermudez and James Fan and Jixian Xu and Tan, {Chih Shan} and Oleksandr Voznyy and Sargent, {Edward H.}",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledged KAUST grant number(s): OSR-2017-CPF-3325 Acknowledgements: J.W.J., Y.K., and J.C. contributed equally to this work. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (NRF-2016R1A6A3A03007170 and 2016R1A6A3A03009820), by Ontario Research Fund-Research Excellence program (ORF7-Ministry of Research and Innovation, Ontario Research Fund-Research Excellence Round 7), by King Abdullah University of Science and Technology (KAUST, Office of Sponsored Research (OSR), Award No. OSR-2017-CPF-3325), and by the Natural Sciences and Engineering Research Council (NSERC) of Canada. O.O. was financially supported by NSERC{\textquoteright}s Postgraduate Scholarships-Doctoral program. The authors thank L. Levina, R. Wolowiec, D. Kopilovic, and E. Palmiano for their help over the course of this research. This publication acknowledges KAUST support, but has no KAUST affiliated authors.",

year = "2017",

month = oct,

day = "9",

doi = "10.1002/adma.201703627",

language = "English (US)",

volume = "29",

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journal = "Advanced Materials",

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publisher = "Wiley",

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Jo, JW, Kim, Y, Choi, J, de Arquer, FPG, Walters, G, Sun, B, Ouellette, O, Kim, J, Proppe, AH, Quintero-Bermudez, R, Fan, J, Xu, J, Tan, CS, Voznyy, O & Sargent, EH 2017, 'Enhanced Open-Circuit Voltage in Colloidal Quantum Dot Photovoltaics via Reactivity-Controlled Solution-Phase Ligand Exchange', Advanced Materials, vol. 29, no. 43, pp. 1703627. https://doi.org/10.1002/adma.201703627

TY - JOUR

T1 - Enhanced Open-Circuit Voltage in Colloidal Quantum Dot Photovoltaics via Reactivity-Controlled Solution-Phase Ligand Exchange

AU - Jo, Jea Woong

AU - Kim, Younghoon

AU - Choi, Jongmin

AU - de Arquer, F. Pelayo García

AU - Walters, Grant

AU - Sun, Bin

AU - Ouellette, Olivier

AU - Kim, Junghwan

AU - Proppe, Andrew H.

AU - Quintero-Bermudez, Rafael

AU - Fan, James

AU - Xu, Jixian

AU - Tan, Chih Shan

AU - Voznyy, Oleksandr

AU - Sargent, Edward H.

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledged KAUST grant number(s): OSR-2017-CPF-3325 Acknowledgements: J.W.J., Y.K., and J.C. contributed equally to this work. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (NRF-2016R1A6A3A03007170 and 2016R1A6A3A03009820), by Ontario Research Fund-Research Excellence program (ORF7-Ministry of Research and Innovation, Ontario Research Fund-Research Excellence Round 7), by King Abdullah University of Science and Technology (KAUST, Office of Sponsored Research (OSR), Award No. OSR-2017-CPF-3325), and by the Natural Sciences and Engineering Research Council (NSERC) of Canada. O.O. was financially supported by NSERC’s Postgraduate Scholarships-Doctoral program. The authors thank L. Levina, R. Wolowiec, D. Kopilovic, and E. Palmiano for their help over the course of this research. This publication acknowledges KAUST support, but has no KAUST affiliated authors.

PY - 2017/10/9

Y1 - 2017/10/9

N2 - The energy disorder that arises from colloidal quantum dot (CQD) polydispersity limits the open-circuit voltage (VOC) and efficiency of CQD photovoltaics. This energy broadening is significantly deteriorated today during CQD ligand exchange and film assembly. Here, a new solution-phase ligand exchange that, via judicious incorporation of reactivity-engineered additives, provides improved monodispersity in final CQD films is reported. It has been found that increasing the concentration of the less reactive species prevents CQD fusion and etching. As a result, CQD solar cells with a VOC of 0.7 V (vs 0.61 V for the control) for CQD films with exciton peak at 1.28 eV and a power conversion efficiency of 10.9% (vs 10.1% for the control) is achieved.

AB - The energy disorder that arises from colloidal quantum dot (CQD) polydispersity limits the open-circuit voltage (VOC) and efficiency of CQD photovoltaics. This energy broadening is significantly deteriorated today during CQD ligand exchange and film assembly. Here, a new solution-phase ligand exchange that, via judicious incorporation of reactivity-engineered additives, provides improved monodispersity in final CQD films is reported. It has been found that increasing the concentration of the less reactive species prevents CQD fusion and etching. As a result, CQD solar cells with a VOC of 0.7 V (vs 0.61 V for the control) for CQD films with exciton peak at 1.28 eV and a power conversion efficiency of 10.9% (vs 10.1% for the control) is achieved.

UR - http://hdl.handle.net/10754/626077

UR - http://doi.wiley.com/10.1002/adma.201703627

UR - http://www.scopus.com/inward/record.url?scp=85030650929&partnerID=8YFLogxK

U2 - 10.1002/adma.201703627

DO - 10.1002/adma.201703627

M3 - Article

SN - 0935-9648

VL - 29

SP - 1703627

JO - Advanced Materials

JF - Advanced Materials

IS - 43

ER -

Enhanced Open-Circuit Voltage in Colloidal Quantum Dot Photovoltaics via Reactivity-Controlled Solution-Phase Ligand Exchange

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