10.6% Certified Colloidal Quantum Dot Solar Cells via Solvent Polarity-Engineered Halide Passivation

Xinzheng Lan; Oleksandr Voznyy; F. Pelayo Garcia de Arquer; Mengxia Liu; Jixian Xu; Andrew H. Proppe; Grant Walters; Fengjia Fan; Hairen Tan; Min Liu; Zhenyu Yang; Sjoerd Hoogland; Edward H. Sargent

doi:10.1021/acs.nanolett.6b01957

10.6% Certified Colloidal Quantum Dot Solar Cells via Solvent Polarity-Engineered Halide Passivation

Xinzheng Lan, Oleksandr Voznyy, F. Pelayo Garcia de Arquer, Mengxia Liu, Jixian Xu, Andrew H. Proppe, Grant Walters, Fengjia Fan, Hairen Tan, Min Liu, Zhenyu Yang, Sjoerd Hoogland, Edward H. Sargent

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

319 Scopus citations

Abstract

Colloidal quantum dot (CQD) solar cells are solution-processed photovoltaics with broad spectral absorption tunability. Major advances in their efficiency have been made via improved CQD surface passivation and device architectures with enhanced charge carrier collection. Herein, we demonstrate a new strategy to improve further the passivation of CQDs starting from the solution phase. A cosolvent system is employed to tune the solvent polarity in order to achieve the solvation of methylammonium iodide (MAI) and the dispersion of hydrophobic PbS CQDs simultaneously in a homogeneous phase, otherwise not achieved in a single solvent. This process enables MAI to access the CQDs to confer improved passivation. This, in turn, allows for efficient charge extraction from a thicker photoactive layer device, leading to a certified solar cell power conversion efficiency of 10.6%, a new certified record in CQD photovoltaics.

Original language	English (US)
Pages (from-to)	4630-4634
Number of pages	5
Journal	Nano Letters
Volume	16
Issue number	7
DOIs	https://doi.org/10.1021/acs.nanolett.6b01957
State	Published - Jun 28 2016
Externally published	Yes

Bibliographical note

KAUST Repository Item: Exported on 2022-06-01
Acknowledged KAUST grant number(s): KUS-11-009-21
Acknowledgements: This publication is based in part on work supported by Award KUS-11-009-21, made by King Abdullah University of Science and Technology (KAUST), by the Ontario Research Fund Research Excellence Program, and by the Natural Sciences and Engineering Research Council (NSERC) of Canada and by the International Cooperation of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea govenment Ministry of Knowledge Economy (2012T100100740). The authors thank E. Palmiano, R. Wolowiec, D. Kopilovic, R. Comin, R. Sabatini, X. Gong, J. Fan, and L. Levina, for their help over the course of this study.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

ASJC Scopus subject areas

Bioengineering
General Materials Science
General Chemistry
Mechanical Engineering
Condensed Matter Physics

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10.1021/acs.nanolett.6b01957

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@article{001d9ea440e9438ea688ebe4e5c4ecfc,

title = "10.6% Certified Colloidal Quantum Dot Solar Cells via Solvent Polarity-Engineered Halide Passivation",

abstract = "Colloidal quantum dot (CQD) solar cells are solution-processed photovoltaics with broad spectral absorption tunability. Major advances in their efficiency have been made via improved CQD surface passivation and device architectures with enhanced charge carrier collection. Herein, we demonstrate a new strategy to improve further the passivation of CQDs starting from the solution phase. A cosolvent system is employed to tune the solvent polarity in order to achieve the solvation of methylammonium iodide (MAI) and the dispersion of hydrophobic PbS CQDs simultaneously in a homogeneous phase, otherwise not achieved in a single solvent. This process enables MAI to access the CQDs to confer improved passivation. This, in turn, allows for efficient charge extraction from a thicker photoactive layer device, leading to a certified solar cell power conversion efficiency of 10.6%, a new certified record in CQD photovoltaics.",

author = "Xinzheng Lan and Oleksandr Voznyy and {de Arquer}, {F. Pelayo Garcia} and Mengxia Liu and Jixian Xu and Proppe, {Andrew H.} and Grant Walters and Fengjia Fan and Hairen Tan and Min Liu and Zhenyu Yang and Sjoerd Hoogland and Sargent, {Edward H.}",

note = "KAUST Repository Item: Exported on 2022-06-01 Acknowledged KAUST grant number(s): KUS-11-009-21 Acknowledgements: This publication is based in part on work supported by Award KUS-11-009-21, made by King Abdullah University of Science and Technology (KAUST), by the Ontario Research Fund Research Excellence Program, and by the Natural Sciences and Engineering Research Council (NSERC) of Canada and by the International Cooperation of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea govenment Ministry of Knowledge Economy (2012T100100740). The authors thank E. Palmiano, R. Wolowiec, D. Kopilovic, R. Comin, R. Sabatini, X. Gong, J. Fan, and L. Levina, for their help over the course of this study. This publication acknowledges KAUST support, but has no KAUST affiliated authors.",

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doi = "10.1021/acs.nanolett.6b01957",

language = "English (US)",

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journal = "Nano Letters",

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T1 - 10.6% Certified Colloidal Quantum Dot Solar Cells via Solvent Polarity-Engineered Halide Passivation

AU - Lan, Xinzheng

AU - Voznyy, Oleksandr

AU - de Arquer, F. Pelayo Garcia

AU - Liu, Mengxia

AU - Xu, Jixian

AU - Proppe, Andrew H.

AU - Walters, Grant

AU - Fan, Fengjia

AU - Tan, Hairen

AU - Liu, Min

AU - Yang, Zhenyu

AU - Hoogland, Sjoerd

AU - Sargent, Edward H.

N1 - KAUST Repository Item: Exported on 2022-06-01 Acknowledged KAUST grant number(s): KUS-11-009-21 Acknowledgements: This publication is based in part on work supported by Award KUS-11-009-21, made by King Abdullah University of Science and Technology (KAUST), by the Ontario Research Fund Research Excellence Program, and by the Natural Sciences and Engineering Research Council (NSERC) of Canada and by the International Cooperation of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea govenment Ministry of Knowledge Economy (2012T100100740). The authors thank E. Palmiano, R. Wolowiec, D. Kopilovic, R. Comin, R. Sabatini, X. Gong, J. Fan, and L. Levina, for their help over the course of this study. This publication acknowledges KAUST support, but has no KAUST affiliated authors.

PY - 2016/6/28

Y1 - 2016/6/28

N2 - Colloidal quantum dot (CQD) solar cells are solution-processed photovoltaics with broad spectral absorption tunability. Major advances in their efficiency have been made via improved CQD surface passivation and device architectures with enhanced charge carrier collection. Herein, we demonstrate a new strategy to improve further the passivation of CQDs starting from the solution phase. A cosolvent system is employed to tune the solvent polarity in order to achieve the solvation of methylammonium iodide (MAI) and the dispersion of hydrophobic PbS CQDs simultaneously in a homogeneous phase, otherwise not achieved in a single solvent. This process enables MAI to access the CQDs to confer improved passivation. This, in turn, allows for efficient charge extraction from a thicker photoactive layer device, leading to a certified solar cell power conversion efficiency of 10.6%, a new certified record in CQD photovoltaics.

AB - Colloidal quantum dot (CQD) solar cells are solution-processed photovoltaics with broad spectral absorption tunability. Major advances in their efficiency have been made via improved CQD surface passivation and device architectures with enhanced charge carrier collection. Herein, we demonstrate a new strategy to improve further the passivation of CQDs starting from the solution phase. A cosolvent system is employed to tune the solvent polarity in order to achieve the solvation of methylammonium iodide (MAI) and the dispersion of hydrophobic PbS CQDs simultaneously in a homogeneous phase, otherwise not achieved in a single solvent. This process enables MAI to access the CQDs to confer improved passivation. This, in turn, allows for efficient charge extraction from a thicker photoactive layer device, leading to a certified solar cell power conversion efficiency of 10.6%, a new certified record in CQD photovoltaics.

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DO - 10.1021/acs.nanolett.6b01957

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SP - 4630

EP - 4634

JO - Nano Letters

JF - Nano Letters

IS - 7

ER -

10.6% Certified Colloidal Quantum Dot Solar Cells via Solvent Polarity-Engineered Halide Passivation

Abstract

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