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Xie Q, Qiao C, Fang J, Xia D, Ding F, Wang Q, Xu G, Shan S, Liao X, Chen Y. Optimizing Active Layer Morphology of Organic Solar Cells by Constructing Random Copolymers with Simple Third Units. Macromol Rapid Commun 2024:e2400458. [PMID: 39072838 DOI: 10.1002/marc.202400458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2024] [Revised: 07/09/2024] [Indexed: 07/30/2024]
Abstract
The molecular structure of the polymer PM6 is elaborately modified through random copolymerization by incorporating simple units of either difluoro-substituted thiophene (2FT) or dicyano-substituted thiophene (2CNT). The incorporation of the 2FT unit significantly enhanced the coplanarity of the random copolymers, leading to improved molecular crystallinity, whereas the introduction of the 2CNT unit featured the opposite effect. Thanks to the optimized morphology resembling a fiber-like interpenetrating network structure, the organic solar cells based on PM6-10%2FT:IT4F showed higher and more balanced charge mobilities, achieving a power conversion efficiency (PCE) of 12.65%, which is comparable to that of PM6-based devices. For comparison, the 2CN-series random copolymers-based devices exhibited lower PCEs of ˂12%. Interestingly, a superior PCE close to 19.0% is achieved in PM6:L8-BO:PM6-20%2CN based ternary device due to the significant improvement in open-circuit voltage. This work demonstrates that the crystallinity of donor polymers can be enhanced by introducing simple structural units to strengthen the coplanarity of the backbone, thereby achieving an optimized morphology that promotes favorable charge transport.
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Affiliation(s)
- Qian Xie
- Institute of Applied Chemistry, Jiangxi Academy of Sciences, Nanchang, 330096, China
| | - Chunyu Qiao
- Institute of Applied Chemistry, Jiangxi Academy of Sciences, Nanchang, 330096, China
| | - Jie Fang
- Institute of Applied Chemistry, Jiangxi Academy of Sciences, Nanchang, 330096, China
| | - Dongdong Xia
- Institute of Applied Chemistry, Jiangxi Academy of Sciences, Nanchang, 330096, China
| | - Feng Ding
- Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, College of Chemistry and Materials, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, 330022, China
| | - Qian Wang
- Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, College of Chemistry and Materials, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, 330022, China
| | - Guodong Xu
- Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, College of Chemistry and Materials, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, 330022, China
| | - Siyu Shan
- Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, College of Chemistry and Materials, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, 330022, China
| | - Xunfan Liao
- Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, College of Chemistry and Materials, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, 330022, China
| | - Yiwang Chen
- Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, College of Chemistry and Materials, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, 330022, China
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Liu BQ, Xu YH, Liu F, Xie CC, Liang SJ, Chen QM, Li WW. Double-Cable Conjugated Polymers with Fullerene Pendant for Single-Component Organic Solar Cells. CHINESE JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1007/s10118-022-2732-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Shavez M, Panda AN. Assessing Effects of Different π bridges on Properties of Random Benzodithiophene-thienothiophene Donor and Non-fullerene Acceptor Based Active Layer. J Phys Chem A 2021; 125:9852-9864. [PMID: 34738461 DOI: 10.1021/acs.jpca.1c07378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This report presents the effect of insertion of four different π bridges, furan, thienothiophene, thiophene, and thiazole, into a random benzodithiophene (BDT)-fluorinated-thienothiophene (TT-F) based donor. Starting from a structure of synthesized donor (D)-acceptor (A) random copolymer with 3:1 ratio, we have designed four D-π-A systems with four different π bridges. Structural, optoelectronic, and charge transport/transfer properties of these donors and donor/NDI (NDI = poly[N,N'-bis(2-hexyldecyl)-naphthalene-1,4,5,8-bis(dicarboximide)-2,6-diyl]-alt-5,5'-(2,2'-bithiophene)) blends are investigated using DFT and TD-DFT methodologies. Our results show that the thiazole based TzP1 oligomer has the deepest HOMO value resulting in the highest open circuit voltage among all systems. The maximum absorption wavelengths of π-linked systems are red-shifted compared to the parent molecule. Rates of charge transfer and charge recombination are the highest and smallest in case of the thiazole/NDI blend system. In addition, hole mobilities in thiophene, thienothiophene, and thiazole based systems are larger than in the parent system. The results indicate that the thiazole unit among the four π bridge units is the most suitable for active layer construction.
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Affiliation(s)
- Mohd Shavez
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Aditya N Panda
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
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Zhang Y, Shao Y, Wei Z, Zhang L, Hu Y, Chen L, Chen S, Yuan Z, Chen Y. "Double-Acceptor-Type" Random Conjugated Terpolymer Donors for Additive-Free Non-Fullerene Organic Solar Cells. ACS APPLIED MATERIALS & INTERFACES 2020; 12:20741-20749. [PMID: 32286044 DOI: 10.1021/acsami.0c02862] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Random conjugated terpolymers (RCTs) not only promote great comprehension and realization for the state-of-the-art highly effective non-fullerene organic solar cells (OSCs) but also offer a simple and practical synthetic strategy. However, the photovoltaic properties of RCTs yet lagged behind that of the donor-acceptor (D-A) alternating copolymer, especially in additive-free devices. Hence, we developed two feasible "double-acceptor-type" random conjugated terpolymers, PBDB-TAZ20 and PBDB-TAZ40. The additive-free OSCs based on PBDB-TAZ20:ITIC and PBDB-TAZ40:ITIC exhibit decent efficiencies of 12.34 and 11.27%, respectively, which both surpass the PBDB-T:ITIC-based device. For RCTs, the reasonably weakened crystallinity and the reduced phase separation degree are demonstrated to help in improving charge transport, reducing bimolecular recombination, and thus enhancing the photovoltaic performance of additive-free OSCs. The results imply that adding a third moiety into the D-A polymer donors provides a simple but efficient synthetic approach for high-performance OSCs.
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Affiliation(s)
- Youdi Zhang
- College of Chemistry, Nanchang University, 999 Xuefu Avenue, Nanchang 330031, China
- Institute of Polymers and Energy Chemistry (IPEC), Nanchang University, 999 Xuefu Avenue, Nanchang 330031, China
| | - Yiming Shao
- College of Chemistry, Nanchang University, 999 Xuefu Avenue, Nanchang 330031, China
| | - Zhouyin Wei
- MOE Key Laboratory of Low-grade Energy Utilization Technologies and Systems, School of Energy & Power Engineering, Chongqing University, Chongqing 400044, China
| | - Lifu Zhang
- College of Chemistry, Nanchang University, 999 Xuefu Avenue, Nanchang 330031, China
- Institute of Polymers and Energy Chemistry (IPEC), Nanchang University, 999 Xuefu Avenue, Nanchang 330031, China
| | - Yu Hu
- College of Chemistry, Nanchang University, 999 Xuefu Avenue, Nanchang 330031, China
| | - Lie Chen
- College of Chemistry, Nanchang University, 999 Xuefu Avenue, Nanchang 330031, China
- Institute of Polymers and Energy Chemistry (IPEC), Nanchang University, 999 Xuefu Avenue, Nanchang 330031, China
| | - Shanshan Chen
- MOE Key Laboratory of Low-grade Energy Utilization Technologies and Systems, School of Energy & Power Engineering, Chongqing University, Chongqing 400044, China
| | - Zhongyi Yuan
- College of Chemistry, Nanchang University, 999 Xuefu Avenue, Nanchang 330031, China
- Institute of Polymers and Energy Chemistry (IPEC), Nanchang University, 999 Xuefu Avenue, Nanchang 330031, China
| | - Yiwang Chen
- College of Chemistry, Nanchang University, 999 Xuefu Avenue, Nanchang 330031, China
- Institute of Polymers and Energy Chemistry (IPEC), Nanchang University, 999 Xuefu Avenue, Nanchang 330031, China
- Institute of Advanced Scientific Research (iASR), Jiangxi Normal University, 99 Ziyang Avenue, Nanchang 330022, China
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Gao X, Wu Y, Tao Y, Huang W. Conjugated Random Terpolymer Donors towardsHigh‐EfficiencyPolymer Solar Cells. CHINESE J CHEM 2020. [DOI: 10.1002/cjoc.201900503] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Xuyu Gao
- Key Lab for Flexible Electronics and Institute of Advanced Materials, Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University 30 South Puzhu Road Nanjing Jiangsu 211816 China
| | - Yijing Wu
- Key Lab for Flexible Electronics and Institute of Advanced Materials, Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University 30 South Puzhu Road Nanjing Jiangsu 211816 China
| | - Youtian Tao
- Key Lab for Flexible Electronics and Institute of Advanced Materials, Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University 30 South Puzhu Road Nanjing Jiangsu 211816 China
| | - Wei Huang
- Key Lab for Flexible Electronics and Institute of Advanced Materials, Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University 30 South Puzhu Road Nanjing Jiangsu 211816 China
- Key Laboratory for Organic Electronics and Information Displays and Institute of Advanced Materials, Nanjing University of Posts and Telecommunications 9 Wenyuan Road Nanjing Jiangsu 210046 China
- Shaanxi Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University (NPU) 127 West Youyi Road, Xi'an Shaanxi 710072 China
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