Efficient As-Cast Thick Film Small-Molecule Organic Solar Cell with Less Fluorination on Donor

Kai Wang; Xin Song; Xiao Guo; Wang Yunhao; Xue Lai; Fei Meng; Mengzhen Du; Dongyu Fan; Ren Zhang; Gongqiang Li; Ko Ko Kyaw Aung; Jianpu Wang; Wei Huang; Derya Baran

doi:10.1039/c9qm00605b

Efficient As-Cast Thick Film Small-Molecule Organic Solar Cell with Less Fluorination on Donor

Kai Wang, Xin Song, Xiao Guo, Wang Yunhao, Xue Lai, Fei Meng, Mengzhen Du, Dongyu Fan, Ren Zhang, Gongqiang Li, Ko Ko Kyaw Aung, Jianpu Wang, Wei Huang, Derya Baran

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9 Scopus citations

Abstract

Herein, two donors based on fluorine substituted isatin units (DI3T-1F, DI3T-2F) were compared with the mixture of PC71BM for thick-film small molecule solar cells. The devices based on DI3T-1F demonstrate balanced charge transportand less trap-assisted recombination, leading to higher PCE of 8.33% witha thickness ca.150 nm compared to DI3F-2F (PCE of 7.32% with thick film at ca. 160 nm) without additives, solvent or thermal annealing treatments. Both devices based on small molecule:fullerene blends demonstrate good tolerance to active layer thickness from 150 to 300 nm. Our results indicate that less fluorine atoms on donor units can optimize the charge transport, phase-segregated morphology in small molecule solar cells without the need for post-treatment.

Original language	English (US)
Pages (from-to)	206-212
Number of pages	7
Journal	Materials Chemistry Frontiers
Volume	4
Issue number	1
DOIs	https://doi.org/10.1039/c9qm00605b
State	Published - Nov 14 2019

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: K. Wang and X. Song contributed equally to this work.
Prof. G. Li thanks for the general supported by the National Key R&D Program of China (2017YFA0204704), the National Science Foundation of China (51773091, 61604069, and 61761136013), and Nature Science Foundation of Jiangsu Province (BK20171465);
Prof A. K. Kyaw thanks for general support by Thousand Talents Program of China and Shenzhen Municipal Science and Technology Innovation Committee and Shenzhen Peacock Team Project (No. KQTD2016030111203005).
Prof. D. Baran thanks for the general supported by KAUST Solar Center Competitive Fund (CCF) for financial support.

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https://repository.kaust.edu.sa/bitstream/10754/660091/1/c9qm00605b.pdf

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@article{f6aa06288903409fb87421247b097e1c,

title = "Efficient As-Cast Thick Film Small-Molecule Organic Solar Cell with Less Fluorination on Donor",

abstract = "Herein, two donors based on fluorine substituted isatin units (DI3T-1F, DI3T-2F) were compared with the mixture of PC71BM for thick-film small molecule solar cells. The devices based on DI3T-1F demonstrate balanced charge transportand less trap-assisted recombination, leading to higher PCE of 8.33% witha thickness ca.150 nm compared to DI3F-2F (PCE of 7.32% with thick film at ca. 160 nm) without additives, solvent or thermal annealing treatments. Both devices based on small molecule:fullerene blends demonstrate good tolerance to active layer thickness from 150 to 300 nm. Our results indicate that less fluorine atoms on donor units can optimize the charge transport, phase-segregated morphology in small molecule solar cells without the need for post-treatment.",

author = "Kai Wang and Xin Song and Xiao Guo and Wang Yunhao and Xue Lai and Fei Meng and Mengzhen Du and Dongyu Fan and Ren Zhang and Gongqiang Li and Aung, {Ko Ko Kyaw} and Jianpu Wang and Wei Huang and Derya Baran",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: K. Wang and X. Song contributed equally to this work. Prof. G. Li thanks for the general supported by the National Key R&D Program of China (2017YFA0204704), the National Science Foundation of China (51773091, 61604069, and 61761136013), and Nature Science Foundation of Jiangsu Province (BK20171465); Prof A. K. Kyaw thanks for general support by Thousand Talents Program of China and Shenzhen Municipal Science and Technology Innovation Committee and Shenzhen Peacock Team Project (No. KQTD2016030111203005). Prof. D. Baran thanks for the general supported by KAUST Solar Center Competitive Fund (CCF) for financial support.",

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AU - Wang, Kai

AU - Song, Xin

AU - Guo, Xiao

AU - Yunhao, Wang

AU - Lai, Xue

AU - Meng, Fei

AU - Du, Mengzhen

AU - Fan, Dongyu

AU - Zhang, Ren

AU - Li, Gongqiang

AU - Aung, Ko Ko Kyaw

AU - Wang, Jianpu

AU - Huang, Wei

AU - Baran, Derya

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: K. Wang and X. Song contributed equally to this work. Prof. G. Li thanks for the general supported by the National Key R&D Program of China (2017YFA0204704), the National Science Foundation of China (51773091, 61604069, and 61761136013), and Nature Science Foundation of Jiangsu Province (BK20171465); Prof A. K. Kyaw thanks for general support by Thousand Talents Program of China and Shenzhen Municipal Science and Technology Innovation Committee and Shenzhen Peacock Team Project (No. KQTD2016030111203005). Prof. D. Baran thanks for the general supported by KAUST Solar Center Competitive Fund (CCF) for financial support.

PY - 2019/11/14

Y1 - 2019/11/14

N2 - Herein, two donors based on fluorine substituted isatin units (DI3T-1F, DI3T-2F) were compared with the mixture of PC71BM for thick-film small molecule solar cells. The devices based on DI3T-1F demonstrate balanced charge transportand less trap-assisted recombination, leading to higher PCE of 8.33% witha thickness ca.150 nm compared to DI3F-2F (PCE of 7.32% with thick film at ca. 160 nm) without additives, solvent or thermal annealing treatments. Both devices based on small molecule:fullerene blends demonstrate good tolerance to active layer thickness from 150 to 300 nm. Our results indicate that less fluorine atoms on donor units can optimize the charge transport, phase-segregated morphology in small molecule solar cells without the need for post-treatment.

AB - Herein, two donors based on fluorine substituted isatin units (DI3T-1F, DI3T-2F) were compared with the mixture of PC71BM for thick-film small molecule solar cells. The devices based on DI3T-1F demonstrate balanced charge transportand less trap-assisted recombination, leading to higher PCE of 8.33% witha thickness ca.150 nm compared to DI3F-2F (PCE of 7.32% with thick film at ca. 160 nm) without additives, solvent or thermal annealing treatments. Both devices based on small molecule:fullerene blends demonstrate good tolerance to active layer thickness from 150 to 300 nm. Our results indicate that less fluorine atoms on donor units can optimize the charge transport, phase-segregated morphology in small molecule solar cells without the need for post-treatment.

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JO - Materials Chemistry Frontiers

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ER -

Efficient As-Cast Thick Film Small-Molecule Organic Solar Cell with Less Fluorination on Donor

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