High-performance ternary organic solar cells with photoresponses beyond 1000 nm

Peiyao Xue; Yiqun Xiao; Tengfei Li; Shuixing Dai; Boyu Jia; Kuan Liu; Jiayu Wang; Xinhui Lu; Ray P.S. Han; Xiaowei Zhan

doi:10.1039/c8ta09042d

High-performance ternary organic solar cells with photoresponses beyond 1000 nm

Peiyao Xue, Yiqun Xiao, Tengfei Li, Shuixing Dai, Boyu Jia, Kuan Liu, Jiayu Wang, Xinhui Lu, Ray P.S. Han, Xiaowei Zhan

Research output: Journal article publication › Journal article › Academic research › peer-review

32 Citations (Scopus)

Abstract

Panchromatic ternary organic solar cells with photoresponses beyond 1000 nm were fabricated using low-bandgap polymer PTB7-Th as a donor and ultralow-bandgap F8IC and mid-bandgap IDT-2BR as nonfullerene acceptors. A ternary device with 20% IDT-2BR content in acceptors exhibits a power conversion efficiency of 12.1%, higher than that of its parent binary devices based on PTB7-Th/F8IC (10.3%) and PTB7-Th/IDT-2BR (7.31%). The third component IDT-2BR simultaneously improves the open-circuit voltage (V_OC), short-circuit current density (J_SC) and fill factor (FF) of the PTB7-Th/F8IC blend. The voltage loss is reduced by the smaller energy offset for charge separation and new charge transport pathway for less charge recombination. Complementary light absorption is beneficial for enhanced J_SC. Co-existence of face-on molecular packing of F8IC and IDT-2BR leads to higher mobilities and more balanced charge transport, which contribute to the improved FF.

Original language	English
Pages (from-to)	24210-24215
Number of pages	6
Journal	Journal of Materials Chemistry A
Volume	6
Issue number	47
DOIs	https://doi.org/10.1039/c8ta09042d
Publication status	Published - Nov 2018

ASJC Scopus subject areas

General Chemistry
Renewable Energy, Sustainability and the Environment
General Materials Science

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

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10.1039/c8ta09042d

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title = "High-performance ternary organic solar cells with photoresponses beyond 1000 nm",

abstract = "Panchromatic ternary organic solar cells with photoresponses beyond 1000 nm were fabricated using low-bandgap polymer PTB7-Th as a donor and ultralow-bandgap F8IC and mid-bandgap IDT-2BR as nonfullerene acceptors. A ternary device with 20% IDT-2BR content in acceptors exhibits a power conversion efficiency of 12.1%, higher than that of its parent binary devices based on PTB7-Th/F8IC (10.3%) and PTB7-Th/IDT-2BR (7.31%). The third component IDT-2BR simultaneously improves the open-circuit voltage (VOC), short-circuit current density (JSC) and fill factor (FF) of the PTB7-Th/F8IC blend. The voltage loss is reduced by the smaller energy offset for charge separation and new charge transport pathway for less charge recombination. Complementary light absorption is beneficial for enhanced JSC. Co-existence of face-on molecular packing of F8IC and IDT-2BR leads to higher mobilities and more balanced charge transport, which contribute to the improved FF.",

author = "Peiyao Xue and Yiqun Xiao and Tengfei Li and Shuixing Dai and Boyu Jia and Kuan Liu and Jiayu Wang and Xinhui Lu and Han, {Ray P.S.} and Xiaowei Zhan",

note = "Funding Information: X. Z. thanks the NSFC (No. 51761165023 and 21734001). X. L. thanks the NSFC/RGC Joint Research Scheme No. N_CUHK418/ 17, Research Grant Council of Hong Kong (General Research Fund No. 14314216) and the beam time and technical support provided by 23A SWAXS beamline at NSRRC, Hsinchu. Publisher Copyright: {\textcopyright} 2018 The Royal Society of Chemistry.",

year = "2018",

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doi = "10.1039/c8ta09042d",

language = "English",

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publisher = "Royal Society of Chemistry",

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AU - Xue, Peiyao

AU - Xiao, Yiqun

AU - Li, Tengfei

AU - Dai, Shuixing

AU - Jia, Boyu

AU - Liu, Kuan

AU - Wang, Jiayu

AU - Lu, Xinhui

AU - Han, Ray P.S.

AU - Zhan, Xiaowei

N1 - Funding Information: X. Z. thanks the NSFC (No. 51761165023 and 21734001). X. L. thanks the NSFC/RGC Joint Research Scheme No. N_CUHK418/ 17, Research Grant Council of Hong Kong (General Research Fund No. 14314216) and the beam time and technical support provided by 23A SWAXS beamline at NSRRC, Hsinchu. Publisher Copyright: © 2018 The Royal Society of Chemistry.

PY - 2018/11

Y1 - 2018/11

N2 - Panchromatic ternary organic solar cells with photoresponses beyond 1000 nm were fabricated using low-bandgap polymer PTB7-Th as a donor and ultralow-bandgap F8IC and mid-bandgap IDT-2BR as nonfullerene acceptors. A ternary device with 20% IDT-2BR content in acceptors exhibits a power conversion efficiency of 12.1%, higher than that of its parent binary devices based on PTB7-Th/F8IC (10.3%) and PTB7-Th/IDT-2BR (7.31%). The third component IDT-2BR simultaneously improves the open-circuit voltage (VOC), short-circuit current density (JSC) and fill factor (FF) of the PTB7-Th/F8IC blend. The voltage loss is reduced by the smaller energy offset for charge separation and new charge transport pathway for less charge recombination. Complementary light absorption is beneficial for enhanced JSC. Co-existence of face-on molecular packing of F8IC and IDT-2BR leads to higher mobilities and more balanced charge transport, which contribute to the improved FF.

AB - Panchromatic ternary organic solar cells with photoresponses beyond 1000 nm were fabricated using low-bandgap polymer PTB7-Th as a donor and ultralow-bandgap F8IC and mid-bandgap IDT-2BR as nonfullerene acceptors. A ternary device with 20% IDT-2BR content in acceptors exhibits a power conversion efficiency of 12.1%, higher than that of its parent binary devices based on PTB7-Th/F8IC (10.3%) and PTB7-Th/IDT-2BR (7.31%). The third component IDT-2BR simultaneously improves the open-circuit voltage (VOC), short-circuit current density (JSC) and fill factor (FF) of the PTB7-Th/F8IC blend. The voltage loss is reduced by the smaller energy offset for charge separation and new charge transport pathway for less charge recombination. Complementary light absorption is beneficial for enhanced JSC. Co-existence of face-on molecular packing of F8IC and IDT-2BR leads to higher mobilities and more balanced charge transport, which contribute to the improved FF.

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High-performance ternary organic solar cells with photoresponses beyond 1000 nm

Abstract

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