Solvent Engineering of Colloidal Quantum Dot Inks for Scalable Fabrication of Photovoltaics

Jonghee Yang; Minseon Kim; Seungjin Lee; Jung Won Yoon; Sanchari Shome; Koen Bertens; Hochan Song; Seul Gi Lim; Jae Taek Oh; Sung Yong Bae; Bo Ram Lee; Whikun Yi; Edward H. Sargent; Hyosung Choi

doi:10.1021/acsami.1c06352

Solvent Engineering of Colloidal Quantum Dot Inks for Scalable Fabrication of Photovoltaics

Jonghee Yang
, Minseon Kim
, Seungjin Lee
, Jung Won Yoon
, Sanchari Shome
, Koen Bertens
, Hochan Song
, Seul Gi Lim
, Jae Taek Oh
, Sung Yong Bae
, Bo Ram Lee
, Whikun Yi
, Edward H. Sargent
, Hyosung Choi

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

30 Scopus citations

Abstract

Development of colloidal quantum dot (CQD) inks enables single-step spin-coating of compact CQD films of appropriate thickness, enabling the promising performance of CQD photovoltaics (CQDPVs). Today's highest-performing CQD inks rely on volatile n-butylamine (BTA), but it is incompatible with scalable deposition methods since a rapid solvent evaporation results in irregular film thickness with an uneven surface. Here, we present a hybrid solvent system, consisting of BTA and N,N-dimethylformamide, which has a favorable acidity for colloidal stability as well as an appropriate vapor pressure, enabling a stable CQD ink that can be used to fabricate homogeneous, large-area CQD films via spray-coating. CQDPVs fabricated with the CQD ink exhibit suppressed charge recombination as well as fast charge extraction compared with conventional CQD ink-based PVs, achieving an improved power conversion efficiency (PCE) of 12.22% in spin-coated devices and the highest ever reported PCE of 8.84% among spray-coated CQDPVs.

Original language	English
Pages (from-to)	36992-37003
Number of pages	12
Journal	ACS Applied Materials and Interfaces
Volume	13
Issue number	31
DOIs	https://doi.org/10.1021/acsami.1c06352
State	Published - 11 Aug 2021
Externally published	Yes

Keywords

colloidal quantum dot
large-area photovoltaics
Lewis acid
Lewis base
solvent engineering
spray-coating

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1021/acsami.1c06352

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@article{0995318d125a4c90a9ee02674446adec,

title = "Solvent Engineering of Colloidal Quantum Dot Inks for Scalable Fabrication of Photovoltaics",

abstract = "Development of colloidal quantum dot (CQD) inks enables single-step spin-coating of compact CQD films of appropriate thickness, enabling the promising performance of CQD photovoltaics (CQDPVs). Today's highest-performing CQD inks rely on volatile n-butylamine (BTA), but it is incompatible with scalable deposition methods since a rapid solvent evaporation results in irregular film thickness with an uneven surface. Here, we present a hybrid solvent system, consisting of BTA and N,N-dimethylformamide, which has a favorable acidity for colloidal stability as well as an appropriate vapor pressure, enabling a stable CQD ink that can be used to fabricate homogeneous, large-area CQD films via spray-coating. CQDPVs fabricated with the CQD ink exhibit suppressed charge recombination as well as fast charge extraction compared with conventional CQD ink-based PVs, achieving an improved power conversion efficiency (PCE) of 12.22\% in spin-coated devices and the highest ever reported PCE of 8.84\% among spray-coated CQDPVs.",

keywords = "colloidal quantum dot, large-area photovoltaics, Lewis acid, Lewis base, solvent engineering, spray-coating",

author = "Jonghee Yang and Minseon Kim and Seungjin Lee and Yoon, \{Jung Won\} and Sanchari Shome and Koen Bertens and Hochan Song and Lim, \{Seul Gi\} and Oh, \{Jae Taek\} and Bae, \{Sung Yong\} and Lee, \{Bo Ram\} and Whikun Yi and Sargent, \{Edward H.\} and Hyosung Choi",

note = "Publisher Copyright: {\textcopyright} 2021 American Chemical Society.",

year = "2021",

month = aug,

day = "11",

doi = "10.1021/acsami.1c06352",

language = "English",

volume = "13",

pages = "36992--37003",

journal = "ACS Applied Materials and Interfaces",

issn = "1944-8244",

publisher = "American Chemical Society",

number = "31",

}

TY - JOUR

T1 - Solvent Engineering of Colloidal Quantum Dot Inks for Scalable Fabrication of Photovoltaics

AU - Yang, Jonghee

AU - Kim, Minseon

AU - Lee, Seungjin

AU - Yoon, Jung Won

AU - Shome, Sanchari

AU - Bertens, Koen

AU - Song, Hochan

AU - Lim, Seul Gi

AU - Oh, Jae Taek

AU - Bae, Sung Yong

AU - Lee, Bo Ram

AU - Yi, Whikun

AU - Sargent, Edward H.

AU - Choi, Hyosung

PY - 2021/8/11

Y1 - 2021/8/11

N2 - Development of colloidal quantum dot (CQD) inks enables single-step spin-coating of compact CQD films of appropriate thickness, enabling the promising performance of CQD photovoltaics (CQDPVs). Today's highest-performing CQD inks rely on volatile n-butylamine (BTA), but it is incompatible with scalable deposition methods since a rapid solvent evaporation results in irregular film thickness with an uneven surface. Here, we present a hybrid solvent system, consisting of BTA and N,N-dimethylformamide, which has a favorable acidity for colloidal stability as well as an appropriate vapor pressure, enabling a stable CQD ink that can be used to fabricate homogeneous, large-area CQD films via spray-coating. CQDPVs fabricated with the CQD ink exhibit suppressed charge recombination as well as fast charge extraction compared with conventional CQD ink-based PVs, achieving an improved power conversion efficiency (PCE) of 12.22% in spin-coated devices and the highest ever reported PCE of 8.84% among spray-coated CQDPVs.

AB - Development of colloidal quantum dot (CQD) inks enables single-step spin-coating of compact CQD films of appropriate thickness, enabling the promising performance of CQD photovoltaics (CQDPVs). Today's highest-performing CQD inks rely on volatile n-butylamine (BTA), but it is incompatible with scalable deposition methods since a rapid solvent evaporation results in irregular film thickness with an uneven surface. Here, we present a hybrid solvent system, consisting of BTA and N,N-dimethylformamide, which has a favorable acidity for colloidal stability as well as an appropriate vapor pressure, enabling a stable CQD ink that can be used to fabricate homogeneous, large-area CQD films via spray-coating. CQDPVs fabricated with the CQD ink exhibit suppressed charge recombination as well as fast charge extraction compared with conventional CQD ink-based PVs, achieving an improved power conversion efficiency (PCE) of 12.22% in spin-coated devices and the highest ever reported PCE of 8.84% among spray-coated CQDPVs.

KW - colloidal quantum dot

KW - large-area photovoltaics

KW - Lewis acid

KW - Lewis base

KW - solvent engineering

KW - spray-coating

UR - https://www.scopus.com/pages/publications/85113282698

U2 - 10.1021/acsami.1c06352

DO - 10.1021/acsami.1c06352

M3 - Article

C2 - 34333973

AN - SCOPUS:85113282698

SN - 1944-8244

VL - 13

SP - 36992

EP - 37003

JO - ACS Applied Materials and Interfaces

JF - ACS Applied Materials and Interfaces

IS - 31

ER -

Solvent Engineering of Colloidal Quantum Dot Inks for Scalable Fabrication of Photovoltaics

Abstract

Keywords

UN SDGs

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