Narrow-Bandgap Single-Component Polymer Solar Cells with Approaching 9% Efficiency

Siying Li; Xin Yuan; Qilin Zhang; Bin Li; Yuxiang Li; Jianguo Sun; Yifeng Feng; Xuning Zhang; Ziang Wu; Huan Wei; Mei Wang; Yuanyuan Hu; Yuan Zhang; Han Young Woo; Jianyu Yuan; Wanli Ma

doi:10.1002/adma.202101295

Narrow-Bandgap Single-Component Polymer Solar Cells with Approaching 9% Efficiency

Siying Li, Xin Yuan, Qilin Zhang, Bin Li, Yuxiang Li, Jianguo Sun, Yifeng Feng, Xuning Zhang, Ziang Wu, Huan Wei, Mei Wang, Yuanyuan Hu, Yuan Zhang, Han Young Woo, Jianyu Yuan, Wanli Ma

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

68 Citations (Scopus)

Abstract

Two narrow-bandgap block conjugated polymers with a (D1–A1)–(D2–A2) backbone architecture, namely PBDB-T-b-PIDIC2T and PBDB-T-b-PTY6, are designed and synthesized for single-component organic solar cells (SCOSCs). Both polymers contain same donor polymer, PBDB-T, but different polymerized nonfullerene molecule acceptors. Compared to all previously reported materials for SCOSCs, PBDB-T-b-PIDIC2T and PBDB-T-b-PTY6 exhibit narrower bandgap for better light harvesting. When incorporated into SCOSCs, the short-circuit current density (J_sc) is significantly improved to over 15 mA cm⁻², together with a record-high power conversion efficiency (PCE) of 8.64%. Moreover, these block copolymers exhibit low energy loss due to high charge transfer (CT) states (E_ct) plus small non-radiative loss (0.26 eV), and improved stability under both ambient condition and continuous 80 °C thermal stresses for over 1000 h. Determination of the charge carrier dynamics and film morphology in these SCOSCs reveals increased carrier recombination, relative to binary bulk-heterojunction devices, which is mainly due to reduced ordering of both donor and acceptor fragments. The close structural relationship between block polymers and their binary counterparts also provides an excellent framework to explore further molecular features that impact the photovoltaic performance and boost the state-of-the-art efficiency of SCOSCs.

Original language	English
Article number	2101295
Journal	Advanced Materials
Volume	33
Issue number	32
DOIs	https://doi.org/10.1002/adma.202101295
Publication status	Published - 2021 Aug 12

Bibliographical note

Funding Information:
S.L. and X.Y. contributed equally to this work. This work was supported by the National Key Research and Development Program of China (No. 2019YFE0108600), National Natural Science Foundation of China (No. 52073198, 51803144, and 61911530158), “111” project, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University. Y.L. is grateful for the support from the Science and Technology Program of Shanxi Province (2019JQ‐244).

Publisher Copyright:
© 2021 Wiley-VCH GmbH

Keywords

low energy loss
narrow bandgap
single-component polymer solar cells
stability

ASJC Scopus subject areas

General Materials Science
Mechanics of Materials
Mechanical Engineering

UN SDGs

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

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10.1002/adma.202101295

Cite this

@article{14a92378cbb048a09e56543b82bdf56b,

title = "Narrow-Bandgap Single-Component Polymer Solar Cells with Approaching 9% Efficiency",

abstract = "Two narrow-bandgap block conjugated polymers with a (D1–A1)–(D2–A2) backbone architecture, namely PBDB-T-b-PIDIC2T and PBDB-T-b-PTY6, are designed and synthesized for single-component organic solar cells (SCOSCs). Both polymers contain same donor polymer, PBDB-T, but different polymerized nonfullerene molecule acceptors. Compared to all previously reported materials for SCOSCs, PBDB-T-b-PIDIC2T and PBDB-T-b-PTY6 exhibit narrower bandgap for better light harvesting. When incorporated into SCOSCs, the short-circuit current density (Jsc) is significantly improved to over 15 mA cm−2, together with a record-high power conversion efficiency (PCE) of 8.64%. Moreover, these block copolymers exhibit low energy loss due to high charge transfer (CT) states (Ect) plus small non-radiative loss (0.26 eV), and improved stability under both ambient condition and continuous 80 °C thermal stresses for over 1000 h. Determination of the charge carrier dynamics and film morphology in these SCOSCs reveals increased carrier recombination, relative to binary bulk-heterojunction devices, which is mainly due to reduced ordering of both donor and acceptor fragments. The close structural relationship between block polymers and their binary counterparts also provides an excellent framework to explore further molecular features that impact the photovoltaic performance and boost the state-of-the-art efficiency of SCOSCs.",

keywords = "low energy loss, narrow bandgap, single-component polymer solar cells, stability",

author = "Siying Li and Xin Yuan and Qilin Zhang and Bin Li and Yuxiang Li and Jianguo Sun and Yifeng Feng and Xuning Zhang and Ziang Wu and Huan Wei and Mei Wang and Yuanyuan Hu and Yuan Zhang and Woo, {Han Young} and Jianyu Yuan and Wanli Ma",

note = "Funding Information: S.L. and X.Y. contributed equally to this work. This work was supported by the National Key Research and Development Program of China (No. 2019YFE0108600), National Natural Science Foundation of China (No. 52073198, 51803144, and 61911530158), “111” project, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University. Y.L. is grateful for the support from the Science and Technology Program of Shanxi Province (2019JQ‐244). Publisher Copyright: {\textcopyright} 2021 Wiley-VCH GmbH",

year = "2021",

month = aug,

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doi = "10.1002/adma.202101295",

language = "English",

volume = "33",

journal = "Advanced Materials",

issn = "0935-9648",

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T1 - Narrow-Bandgap Single-Component Polymer Solar Cells with Approaching 9% Efficiency

AU - Li, Siying

AU - Yuan, Xin

AU - Zhang, Qilin

AU - Li, Bin

AU - Li, Yuxiang

AU - Sun, Jianguo

AU - Feng, Yifeng

AU - Zhang, Xuning

AU - Wu, Ziang

AU - Wei, Huan

AU - Wang, Mei

AU - Hu, Yuanyuan

AU - Zhang, Yuan

AU - Woo, Han Young

AU - Yuan, Jianyu

AU - Ma, Wanli

N1 - Funding Information: S.L. and X.Y. contributed equally to this work. This work was supported by the National Key Research and Development Program of China (No. 2019YFE0108600), National Natural Science Foundation of China (No. 52073198, 51803144, and 61911530158), “111” project, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University. Y.L. is grateful for the support from the Science and Technology Program of Shanxi Province (2019JQ‐244). Publisher Copyright: © 2021 Wiley-VCH GmbH

PY - 2021/8/12

Y1 - 2021/8/12

N2 - Two narrow-bandgap block conjugated polymers with a (D1–A1)–(D2–A2) backbone architecture, namely PBDB-T-b-PIDIC2T and PBDB-T-b-PTY6, are designed and synthesized for single-component organic solar cells (SCOSCs). Both polymers contain same donor polymer, PBDB-T, but different polymerized nonfullerene molecule acceptors. Compared to all previously reported materials for SCOSCs, PBDB-T-b-PIDIC2T and PBDB-T-b-PTY6 exhibit narrower bandgap for better light harvesting. When incorporated into SCOSCs, the short-circuit current density (Jsc) is significantly improved to over 15 mA cm−2, together with a record-high power conversion efficiency (PCE) of 8.64%. Moreover, these block copolymers exhibit low energy loss due to high charge transfer (CT) states (Ect) plus small non-radiative loss (0.26 eV), and improved stability under both ambient condition and continuous 80 °C thermal stresses for over 1000 h. Determination of the charge carrier dynamics and film morphology in these SCOSCs reveals increased carrier recombination, relative to binary bulk-heterojunction devices, which is mainly due to reduced ordering of both donor and acceptor fragments. The close structural relationship between block polymers and their binary counterparts also provides an excellent framework to explore further molecular features that impact the photovoltaic performance and boost the state-of-the-art efficiency of SCOSCs.

AB - Two narrow-bandgap block conjugated polymers with a (D1–A1)–(D2–A2) backbone architecture, namely PBDB-T-b-PIDIC2T and PBDB-T-b-PTY6, are designed and synthesized for single-component organic solar cells (SCOSCs). Both polymers contain same donor polymer, PBDB-T, but different polymerized nonfullerene molecule acceptors. Compared to all previously reported materials for SCOSCs, PBDB-T-b-PIDIC2T and PBDB-T-b-PTY6 exhibit narrower bandgap for better light harvesting. When incorporated into SCOSCs, the short-circuit current density (Jsc) is significantly improved to over 15 mA cm−2, together with a record-high power conversion efficiency (PCE) of 8.64%. Moreover, these block copolymers exhibit low energy loss due to high charge transfer (CT) states (Ect) plus small non-radiative loss (0.26 eV), and improved stability under both ambient condition and continuous 80 °C thermal stresses for over 1000 h. Determination of the charge carrier dynamics and film morphology in these SCOSCs reveals increased carrier recombination, relative to binary bulk-heterojunction devices, which is mainly due to reduced ordering of both donor and acceptor fragments. The close structural relationship between block polymers and their binary counterparts also provides an excellent framework to explore further molecular features that impact the photovoltaic performance and boost the state-of-the-art efficiency of SCOSCs.

KW - low energy loss

KW - narrow bandgap

KW - single-component polymer solar cells

KW - stability

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DO - 10.1002/adma.202101295

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SN - 0935-9648

VL - 33

JO - Advanced Materials

JF - Advanced Materials

IS - 32

M1 - 2101295

ER -

Narrow-Bandgap Single-Component Polymer Solar Cells with Approaching 9% Efficiency

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

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