A Tuned Alternating D–A Copolymer Hole-Transport Layer Enables Colloidal Quantum Dot Solar Cells with Superior Fill Factor and Efficiency

Hong Il Kim; Se Woong Baek; Hyung Jin Cheon; Seung Un Ryu; Seungjin Lee; Min Jae Choi; Kyoungwon Choi; Margherita Biondi; Sjoerd Hoogland; F. P.García de Arquer; Soon Ki Kwon; Yun Hi Kim; Taiho Park; Edward H. Sargent

doi:10.1002/adma.202004985

A Tuned Alternating D–A Copolymer Hole-Transport Layer Enables Colloidal Quantum Dot Solar Cells with Superior Fill Factor and Efficiency

Hong Il Kim, Se Woong Baek, Hyung Jin Cheon, Seung Un Ryu, Seungjin Lee, Min Jae Choi, Kyoungwon Choi, Margherita Biondi, Sjoerd Hoogland, F. P.García de Arquer, Soon Ki Kwon, Yun Hi Kim, Taiho Park, Edward H. Sargent

Department of Chemical and Biochemical Engineering

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

70 Scopus citations

Abstract

The need for optoelectronic and chemical compatibility between the layers in colloidal quantum dot (CQD) photovoltaic devices remains a bottleneck in further increasing performance. Conjugated polymers are promising candidates as new hole-transport layer (HTL) materials in CQD solar cells (CQD-SCs) owing to the highly tunable optoelectronic properties and compatible chemistries. A diketopyrrolopyrrole-based polymer with benzothiadiazole derivatives (PD2FCT-29DPP) as an HTL in these devices is reported. The energy level, molecular orientation, and hole mobility of this HTL are manipulated through molecular engineering. By levering the polymer's optical absorption spectrum complementary to that of the CQD active layer, EQE across the visible and near-infrared regions is maximized. As a result, a PD2FCT-29DPP-based device exhibits a fill factor of 70% and approximately 35% efficiency enhancement compared to a PTB7-based device.

Original language	English
Article number	2004985
Journal	Advanced Materials
Volume	32
Issue number	48
DOIs	https://doi.org/10.1002/adma.202004985
State	Published - 3 Dec 2020

Keywords

alternating D–A copolymers
colloidal quantum dots
conducting polymers
hole-transport layers
solar cells

UN SDGs

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

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Kim, H. I., Baek, S. W., Cheon, H. J., Ryu, S. U., Lee, S., Choi, M. J., Choi, K., Biondi, M., Hoogland, S., de Arquer, F. P. G., Kwon, S. K., Kim, Y. H., Park, T., & Sargent, E. H. (2020). A Tuned Alternating D–A Copolymer Hole-Transport Layer Enables Colloidal Quantum Dot Solar Cells with Superior Fill Factor and Efficiency. Advanced Materials, 32(48), Article 2004985. https://doi.org/10.1002/adma.202004985

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title = "A Tuned Alternating D–A Copolymer Hole-Transport Layer Enables Colloidal Quantum Dot Solar Cells with Superior Fill Factor and Efficiency",

abstract = "The need for optoelectronic and chemical compatibility between the layers in colloidal quantum dot (CQD) photovoltaic devices remains a bottleneck in further increasing performance. Conjugated polymers are promising candidates as new hole-transport layer (HTL) materials in CQD solar cells (CQD-SCs) owing to the highly tunable optoelectronic properties and compatible chemistries. A diketopyrrolopyrrole-based polymer with benzothiadiazole derivatives (PD2FCT-29DPP) as an HTL in these devices is reported. The energy level, molecular orientation, and hole mobility of this HTL are manipulated through molecular engineering. By levering the polymer's optical absorption spectrum complementary to that of the CQD active layer, EQE across the visible and near-infrared regions is maximized. As a result, a PD2FCT-29DPP-based device exhibits a fill factor of 70% and approximately 35% efficiency enhancement compared to a PTB7-based device.",

keywords = "alternating D–A copolymers, colloidal quantum dots, conducting polymers, hole-transport layers, solar cells",

author = "Kim, {Hong Il} and Baek, {Se Woong} and Cheon, {Hyung Jin} and Ryu, {Seung Un} and Seungjin Lee and Choi, {Min Jae} and Kyoungwon Choi and Margherita Biondi and Sjoerd Hoogland and {de Arquer}, {F. P.Garc{\'i}a} and Kwon, {Soon Ki} and Kim, {Yun Hi} and Taiho Park and Sargent, {Edward H.}",

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year = "2020",

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day = "3",

doi = "10.1002/adma.202004985",

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Kim, HI, Baek, SW, Cheon, HJ, Ryu, SU, Lee, S, Choi, MJ, Choi, K, Biondi, M, Hoogland, S, de Arquer, FPG, Kwon, SK, Kim, YH, Park, T & Sargent, EH 2020, 'A Tuned Alternating D–A Copolymer Hole-Transport Layer Enables Colloidal Quantum Dot Solar Cells with Superior Fill Factor and Efficiency', Advanced Materials, vol. 32, no. 48, 2004985. https://doi.org/10.1002/adma.202004985

TY - JOUR

T1 - A Tuned Alternating D–A Copolymer Hole-Transport Layer Enables Colloidal Quantum Dot Solar Cells with Superior Fill Factor and Efficiency

AU - Kim, Hong Il

AU - Baek, Se Woong

AU - Cheon, Hyung Jin

AU - Ryu, Seung Un

AU - Lee, Seungjin

AU - Choi, Min Jae

AU - Choi, Kyoungwon

AU - Biondi, Margherita

AU - Hoogland, Sjoerd

AU - de Arquer, F. P.García

AU - Kwon, Soon Ki

AU - Kim, Yun Hi

AU - Park, Taiho

AU - Sargent, Edward H.

PY - 2020/12/3

Y1 - 2020/12/3

N2 - The need for optoelectronic and chemical compatibility between the layers in colloidal quantum dot (CQD) photovoltaic devices remains a bottleneck in further increasing performance. Conjugated polymers are promising candidates as new hole-transport layer (HTL) materials in CQD solar cells (CQD-SCs) owing to the highly tunable optoelectronic properties and compatible chemistries. A diketopyrrolopyrrole-based polymer with benzothiadiazole derivatives (PD2FCT-29DPP) as an HTL in these devices is reported. The energy level, molecular orientation, and hole mobility of this HTL are manipulated through molecular engineering. By levering the polymer's optical absorption spectrum complementary to that of the CQD active layer, EQE across the visible and near-infrared regions is maximized. As a result, a PD2FCT-29DPP-based device exhibits a fill factor of 70% and approximately 35% efficiency enhancement compared to a PTB7-based device.

AB - The need for optoelectronic and chemical compatibility between the layers in colloidal quantum dot (CQD) photovoltaic devices remains a bottleneck in further increasing performance. Conjugated polymers are promising candidates as new hole-transport layer (HTL) materials in CQD solar cells (CQD-SCs) owing to the highly tunable optoelectronic properties and compatible chemistries. A diketopyrrolopyrrole-based polymer with benzothiadiazole derivatives (PD2FCT-29DPP) as an HTL in these devices is reported. The energy level, molecular orientation, and hole mobility of this HTL are manipulated through molecular engineering. By levering the polymer's optical absorption spectrum complementary to that of the CQD active layer, EQE across the visible and near-infrared regions is maximized. As a result, a PD2FCT-29DPP-based device exhibits a fill factor of 70% and approximately 35% efficiency enhancement compared to a PTB7-based device.

KW - alternating D–A copolymers

KW - colloidal quantum dots

KW - conducting polymers

KW - hole-transport layers

KW - solar cells

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AN - SCOPUS:85094197628

SN - 0935-9648

VL - 32

JO - Advanced Materials

JF - Advanced Materials

IS - 48

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ER -

A Tuned Alternating D–A Copolymer Hole-Transport Layer Enables Colloidal Quantum Dot Solar Cells with Superior Fill Factor and Efficiency

Abstract

Keywords

UN SDGs

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