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Ran X, Qiu D, Shi Y, Zhang H, Zhang J, Wei Z, Lu K. Multi-arm quinoxaline-based acceptors formed by π-conjugation extension for efficient organic solar cells. Chem Commun (Camb) 2024; 60:10548-10551. [PMID: 39229778 DOI: 10.1039/d4cc03236e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/05/2024]
Abstract
Manipulating the conjugated backbone of small molecule acceptors (SMAs) is of particular importance in developing efficient organic solar cells (OSCs). Recently, trimers and other multi-arm SMAs have been found to be able to provide more intermolecular interaction, demonstrating excellent molecular stacking and device performance. However, the synthesis of this type of SMA usually relies on tristin or polystin compounds. Instead, expanding multiple arms in the central cores of SMAs is relatively simple and not restricted by tin compounds. Based on the quinoxaline core, two kinds of multi-arm SMAs, FQx-IC and TQx-IC with 4 and 3 arms, have been developed in this work. Compared to FQx-IC, TQx-IC exhibits an ordered face-on molecular orientation, appropriate film-forming process, and more favorable phase separation morphology and balanced charge transport. When blended with the polymer donor D18, OSCs based on TQx-IC achieve a power conversion efficiency (PCE) of 17.36%, which is superior to the device based on D18:FQx-IC (16.24%). In addition, using the ternary strategy of incorporating the TQx-IC into the D18:Y6 system, an excellent PCE of 18.82% is achieved. Therefore, this multi-arm molecular design strategy has great potential for regulating molecular stacking, absorption, and the corresponding device performance.
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Affiliation(s)
- Xinya Ran
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing 100190, China.
- Sino-Danish Center for Education and Research, Sino-Danish College, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Dingding Qiu
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing 100190, China.
| | - Yanan Shi
- National Engineering Research Center for Rare Earth, Grirem Advanced Materials Co., Ltd, Beijing 100088, China
| | - Hao Zhang
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing 100190, China.
| | - Jianqi Zhang
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing 100190, China.
| | - Zhixiang Wei
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing 100190, China.
- Sino-Danish Center for Education and Research, Sino-Danish College, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Kun Lu
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing 100190, China.
- Sino-Danish Center for Education and Research, Sino-Danish College, University of Chinese Academy of Sciences, Beijing 100049, China
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Ran X, Shi Y, Qiu D, Zhang J, Lu K, Wei Z. The central core size effect in quinoxaline-based non-fullerene acceptors for high VOC organic solar cells. NANOSCALE 2023; 15:18291-18299. [PMID: 37941482 DOI: 10.1039/d3nr05077g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2023]
Abstract
For organic solar cells (OSCs), obtaining a high open circuit voltage (VOC) is often accompanied by the sacrifice of the circuit current density (JSC) and filling factor (FF), and it is difficult to strike a balance between VOC and JSC × FF. The trade-off of these parameters is often the critical factor limiting the improvement of the power conversion efficiency (PCE). Extended backbone conjugation and side chain engineering of non-fullerene acceptors (NFAs) are effective strategies to optimize the performance of OSCs. Herein, based on the quinoxaline central core and branched alkyl chains at the β position of the thiophene unit, we designed and synthesized three NFAs with different sized cores. Interestingly, Qx-BO-3 with a smaller central core showed better planarity and more appropriate crystallinity. As a result, PM6:Qx-BO-3-based devices obtained more suitable phase separation, more efficient exciton dissociation, and charge transport properties. Therefore, the OSCs based on PM6:Qx-BO-3 yielded an outstanding PCE of 17.03%, significantly higher than the devices based on PM6:Qx-BO-1 (10.57%) and PM6:Qx-BO-2 (11.34%) although the latter two devices have lower VOC losses. These results indicated that fine-tuning the central core size can effectively optimize the molecular geometry of NFAs and the film morphology of OSCs. This work provides an effective method for designing high-performance NFA-OSCs with high VOCs.
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Affiliation(s)
- Xinya Ran
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China.
- Sino-Danish Center for Education and Research, Sino-Danish College University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Yanan Shi
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China.
| | - Dingding Qiu
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China.
- Sino-Danish Center for Education and Research, Sino-Danish College University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Jianqi Zhang
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China.
| | - Kun Lu
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China.
- Sino-Danish Center for Education and Research, Sino-Danish College University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Zhixiang Wei
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China.
- Sino-Danish Center for Education and Research, Sino-Danish College University of Chinese Academy of Sciences, Beijing 100049, P. R. China
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Al-Marhabi AR, El-Shishtawy RM, Al-Footy KO. Synthesis and optical properties of novel key electron donors-based pinacol boronate ester derived from phenothiazine, phenoxazine and carbazole. J Organomet Chem 2022. [DOI: 10.1016/j.jorganchem.2022.122373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Yin L, Yuan Q, Li Y. D–A–A′-type asymmetric small molecules based on triphenylamine-diketopyrrolopyrrole/5,6-difluoro-2,1,3-benzothiadiazole backbone for organic photovoltaic materials. NEW J CHEM 2020. [DOI: 10.1039/d0nj02239j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Five novel asymmetric OSMs are designed and synthesized with a tuned terminal group and central core, and the effect of their structure on their photoelectrical properties are investigated.
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Affiliation(s)
- Lunxiang Yin
- School of Chemical Engineering
- Dalian University of Technology
- Linggong Road 2
- Dalian
- P. R. China
| | - Qingqing Yuan
- School of Chemical Engineering
- Dalian University of Technology
- Linggong Road 2
- Dalian
- P. R. China
| | - Yanqin Li
- School of Chemical Engineering
- Dalian University of Technology
- Linggong Road 2
- Dalian
- P. R. China
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Sutton JJ, Barnsley JE, Mapley JI, Wagner P, Officer DL, Gordon KC. Modulation of Donor-Acceptor Distance in a Series of Carbazole Push-Pull Dyes; A Spectroscopic and Computational Study. Molecules 2018; 23:molecules23020421. [PMID: 29443935 PMCID: PMC6017769 DOI: 10.3390/molecules23020421] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2018] [Revised: 02/08/2018] [Accepted: 02/12/2018] [Indexed: 11/16/2022] Open
Abstract
A series of eight carbazole-cyanoacrylate based donor-acceptor dyes were studied. Within the series the influence of modifying the thiophene bridge, linking donor and acceptor and a change in the nature of the acceptor, from acid to ester, was explored. In this joint experimental and computational study we have used electronic absorbance and emission spectroscopies, Raman spectroscopy and computational modeling (density functional theory). From these studies it was found that extending the bridge length allowed the lowest energy transition to be systematically red shifted by 0.12 eV, allowing for limited tuning of the absorption of dyes using this structural motif. Using the aforementioned techniques we demonstrate that this transition is charge transfer in nature. Furthermore, the extent of charge transfer between donor and acceptor decreases with increasing bridge length and the bridge plays a smaller role in electronically mixing with the acceptor as it is extended.
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Affiliation(s)
- Joshua J Sutton
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand.
| | - Jonathan E Barnsley
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand.
| | - Joseph I Mapley
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand.
| | - Pawel Wagner
- ARC Centre of Excellence for Electromaterials Science, University of Wollongong, Wollongong, NSW 2522, Australia.
- Intelligent Polymer Research Institute/AIIM Faculty, Innovation Campus, University of Wollongong, Wollongong, NSW 2522, Australia.
| | - David L Officer
- ARC Centre of Excellence for Electromaterials Science, University of Wollongong, Wollongong, NSW 2522, Australia.
- Intelligent Polymer Research Institute/AIIM Faculty, Innovation Campus, University of Wollongong, Wollongong, NSW 2522, Australia.
| | - Keith C Gordon
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand.
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Theoretical and experimental study of electron-deficient core substitution effect of diketopyrrolopyrrole derivatives on optoelectrical and charge transport properties. Chem Phys 2018. [DOI: 10.1016/j.chemphys.2017.12.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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