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Wu J, Fu C, Chen B, Rong X, Lu Z, Huang Y. Isomeric Effect of a π Bridge in an IDT-Based Nonfused Electron Photovoltaic Acceptor. Chemistry 2024; 30:e202302624. [PMID: 37806959 DOI: 10.1002/chem.202302624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 09/29/2023] [Accepted: 10/07/2023] [Indexed: 10/10/2023]
Abstract
A pair of isomers, IDT-BOF containing S⋅⋅⋅O/F⋅⋅⋅H noncovalently configurational locks and IDT-BFO containing F⋅⋅⋅H/O⋅⋅⋅H noncovalently configurational locks, with an acceptor-π-donor-π-acceptor (A-π-D-π-A) structure have been designed and synthesized by choosing 4,9-dihydro-s-indaceno[1,2-b : 5,6-b']dithiophene (IDT) as the D unit, an F/n-hexyloxy substituted phenyl ring as π bridge, and 3-(dicyanomethylidene)indan-1-one as the A unit. Owing to the S⋅⋅⋅O/F⋅⋅⋅H or F⋅⋅⋅H/O⋅⋅⋅H noncovalently configurational locks, both IDT-BOF and IDT-BFO have a completely planar structure. IDT-BOF exhibits a similar LUMO to IDT-BFO, but higher HOMO energy levels, leading to a smaller optical bandgap and red-shifted absorption. However, IDT-BOF-based bulk-heterojunction organic solar cells (BHJ-OSCs) coupled with PBDB-T, and PCE-10 as donor materials both exhibited a lower PCE than that of IDT-BFO (PBDB-T: 5.2 vs. 6.1 %; PCE-10: 1.7 vs. 3.2 %). Comprehensively comparing and investigating IDT-BOF : PBDB-T and IDT-BFO : PBDB-T OSCs suggested that the large phase separation and serious charge recombination of IDT-BOF-based OSCs contributed to its lower power conversion efficiency. Importantly, ternary solar cells based on PBDB-T : Y5 as control devices with an additional 10 % IDT-BFO exhibited a 5 % enhancement in the PCE compared to the control device (14.3 vs. 13.46 %).
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Affiliation(s)
- Jianglin Wu
- Key Laboratory of Green Chemistry and Technology (Ministry of Education) College of Chemistry, Sichuan University, Chengdu, 610064, P. R. China
- SINOPEC Maoming Petrochemical Co., Ltd, Maoming, 525000, P. R. China
- Guangdong Provincial Key Laboratory of Advanced Green Lubricating Materials, Maoming, 525000, P. R. China
| | - Caixia Fu
- Key Laboratory of Green Chemistry and Technology (Ministry of Education) College of Chemistry, Sichuan University, Chengdu, 610064, P. R. China
- SINOPEC Maoming Petrochemical Co., Ltd, Maoming, 525000, P. R. China
- Guangdong Provincial Key Laboratory of Advanced Green Lubricating Materials, Maoming, 525000, P. R. China
| | - Baiquan Chen
- Key Laboratory of Green Chemistry and Technology (Ministry of Education) College of Chemistry, Sichuan University, Chengdu, 610064, P. R. China
| | - Xugang Rong
- Key Laboratory of Green Chemistry and Technology (Ministry of Education) College of Chemistry, Sichuan University, Chengdu, 610064, P. R. China
| | - Zhiyun Lu
- Key Laboratory of Green Chemistry and Technology (Ministry of Education) College of Chemistry, Sichuan University, Chengdu, 610064, P. R. China
| | - Yan Huang
- Key Laboratory of Green Chemistry and Technology (Ministry of Education) College of Chemistry, Sichuan University, Chengdu, 610064, P. R. China
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