Donor-spacer-acceptor monodisperse conjugated co-oligomers for efficient single-molecule photovoltaic cells based on non-fullerene acceptors
文献类型：期刊论文
| 作者 | Qu, Jianfei1,2; Gao, Bingrong1,3; Tian, Hongkun1; Zhang, Xiaojie1; Wang, Yan3; Xie, Zhiyuan1; Wang, Haiyu3; Geng, Yanhou1; Wang, Fosong1 |
| 刊名 | JOURNAL OF MATERIALS CHEMISTRY A
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| 出版日期 | 2014 |
| 卷号 | 2期号:10页码:3632-3640 |
| ISSN号 | 2050-7488 |
| DOI | 10.1039/c3ta14701k |
| 英文摘要 | The current challenges for efficient bulk heterojunction (BHJ) organic photovoltaics (OPVs) based on organic/polymeric (non-fullerene) acceptors involve difficult control of neat phase separation in the nanoscale, severe geminate charge recombination, etc. Herein, a new molecular design concept, that is to construct donor-spacer-acceptor (D-S-A) co-oligomers with self-assembly properties, is proposed in order to realize ideal film morphology and manipulate the exciton dissociation and geminate charge recombination processes simultaneously. Three D-S-A co-oligomers, i.e. F5T8P-C2, F5T8P-C4 and F5T8P-C6 with oligo(fluorene-alt-bithiophene), perylene diimide (PDI) and alkyl as D-, A- and S-segments, respectively, were synthesized. All three D-S-A co-oligomers can form D-A alternating lamellar nanostructures with periods of similar to 15 nm, an ideal nanostructure for BHJ OPVs. Compared to D-A co-oligomer F5T8-epP in which the D- and A-segments are directly connected without the alkyl spacer, the D-S-A co-oligomers not only show higher electron mobilities due to closer packing of PDI moieties, but also exhibit longer lifetimes of the charge-transfer states that can potentially restrain the geminate charge recombination and improve the charge generation efficiency. Accordingly, the single-molecule photovoltaic cells based on the D-S-A co-oligomers exhibit an improved fill factor of 0.47 and a high open-circuit voltage of 1.04 V. In particular, an external quantum efficiency of similar to 65%, which is the highest for BHJ OPVs based on non-fullerene acceptor materials, has been demonstrated. By further extending the absorption onset of D-S-A co-oligomers to similar to 600 nm, a single-molecule photovoltaic device with a power conversion efficiency of 2.70% has been fabricated. These results prove that high-efficiency BHJ OPVs based on non-fullerene acceptors are achievable if both the film morphology of the D-A blend and D-A interfaces are suitably manipulated. |
| 语种 | 英语 |
| WOS记录号 | WOS:000331249900046 |
| 出版者 | ROYAL SOC CHEMISTRY |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/52239]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Geng, Yanhou |
| 作者单位 | 1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, Changchun 130012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qu, Jianfei,Gao, Bingrong,Tian, Hongkun,et al. Donor-spacer-acceptor monodisperse conjugated co-oligomers for efficient single-molecule photovoltaic cells based on non-fullerene acceptors[J]. JOURNAL OF MATERIALS CHEMISTRY A,2014,2(10):3632-3640. |
| APA | Qu, Jianfei.,Gao, Bingrong.,Tian, Hongkun.,Zhang, Xiaojie.,Wang, Yan.,...&Wang, Fosong.(2014).Donor-spacer-acceptor monodisperse conjugated co-oligomers for efficient single-molecule photovoltaic cells based on non-fullerene acceptors.JOURNAL OF MATERIALS CHEMISTRY A,2(10),3632-3640. |
| MLA | Qu, Jianfei,et al."Donor-spacer-acceptor monodisperse conjugated co-oligomers for efficient single-molecule photovoltaic cells based on non-fullerene acceptors".JOURNAL OF MATERIALS CHEMISTRY A 2.10(2014):3632-3640. |
入库方式： OAI收割
来源：化学研究所
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