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Research Article

Layer-by-layer slot-die coated high-efficiency organic solar cells processed using twin boiling point solvents under ambient condition

Yu Yang1, Erming Feng1, Hengyue Li1, Zichao Shen2, Wanrong Liu1, Jingbo Guo3, Qun Luo3, Jidong Zhang4, Guanghao Lu2( ), Changqi Ma3, Junliang Yang1( )
Hunan Key Laboratory for Super-microstructure and Ultrafast ProcessSchool of Physics and Electronics, Central South UniversityChangsha410083China
Frontier Institute of Science and TechnologyXi'an Jiaotong UniversityXi'an710054China
Printable Electronics Research CenterSuzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of SciencesSuzhou215123China
Changchun Institute of Applied Chemistry, Chinese Academy of SciencesChangchun130022China
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Graphical Abstract

Abstract

Layer-by-layer (LbL) strategy has been developed to form bulk heterojunction (BHJ) structure for processing efficient organic solar cells (OSCs). Herein, LbL slot-die coating with twin boiling point solvents (TBPS) strategy was developed to fabricate highly efficient OSCs, which matches with large-scale, high throughput roll-to-roll (R2R) industrialized mass process. The TBPS strategy could produce high-quality thin film without any additive, leading to the optimized vertical phase separation with interpenetrating nanostructures, as well as the enhanced charge transport and extraction. Thus, the power conversion efficiency up to 14.42% was achieved for [(2, 6-(4, 8-bis(5-(2-ethylhexyl-3-fluoro)thiophen-2-yl)-benzo [1, 2-b: 4, 5-b']dithiophene))-alt-(5, 5-(1', 3'-di-2-thienyl-5', 7'- bis(2-ethylhexyl)benzo[1', 2'-c: 4', 5'-c']dithiophene-4, 8-dione)]: 2, 2'-((2Z, 2'Z)-((12, 13-bis(2-ethylhexyl)-3, 9-diundecyl-12, 13-dihydro-[1,2,5]thiadiazolo[3, 4-e]thieno[2'', 3'': 4'', 5'']thieno[2', 3': 4, 5]pyrrolo[3, 2-g]thieno[2', 3': 4, 5]thieno[3, 2-b]indole-2, 10-diyl)bis(methanylylidene)) bis(5, 6-difluoro-3-oxo-2, 3-dihydro-1H-indene-2, 1-diylidene))dimalononitrile (PM6:Y6) OSCs fabricated via sequentially LbL slot-die coating using the TBPS strategy under ambient condition. The research provides a potential route for industrialized production of high-efficiency and large-area OSC devices.

Keywords

organic solar cellsslot-die coatingtwin boiling point solventlayer-by-layer (LbL)vertical phase separation

Electronic Supplementary Material

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Nano Research
Volume 14 Issue 11,
November 2021
Pages 4236-4242
DOI: 10.1007/s12274-021-3576-8
Cite this article:
Yang Y, Feng E, Li H, et al. Layer-by-layer slot-die coated high-efficiency organic solar cells processed using twin boiling point solvents under ambient condition. Nano Research, 2021, 14(11): 4236-4242. https://doi.org/10.1007/s12274-021-3576-8
Topics:
Organic solar cells

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Received: 13 March 2021
Revised: 22 April 2021
Accepted: 05 May 2021
Published: 13 July 2021
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2021
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