Improved synthesis and photovoltaic performance of donor-acceptor copolymers based on dibenzothiophene-cored ladder-type heptacyclic units
文献类型：期刊论文
| 作者 | Wang, Lixin1,2; Cai, Dongdong1; Tang, Changquan1; Wang, Meng1,2; Yin, Zhigang1,2; Zheng, Qingdong1 |
| 刊名 | Journal of materials chemistry c
 |
| 出版日期 | 2015 |
| 卷号 | 3期号:22页码:5631-5641 |
| ISSN号 | 2050-7526 |
| DOI | 10.1039/c5tc00398a |
| 通讯作者 | Zheng, qingdong(qingdongzheng@fjirsm.ac.cn) |
| 英文摘要 | We have developed a facile synthetic route to a ladder-type donor unit (sdct) wherein two outer thiophene subunits are covalently fastened to the central dibenzothiophene core through two sp(3)-hybridized bridging carbons. an innovative transformation from an aryl ketone group to an aryl ester group was applied to construct the ladder-type molecular skeleton, and the overall synthetic yield toward the donor unit has been significantly improved by choosing aryl side chains instead of aliphatic ones to avoid competing dehydration reactions. to reveal the effects of pi-spacers and heteroatom substituents, three donor-acceptor (d-a) copolymers containing sdct and acceptor units of 2,1,3-benzothiadiazole (bt), 2,1,3-benzoxadiazole (bo), or 4,7-bis(2-thienyl)-2,1,3-benzothiadiazole (dtbt) were synthesized, characterized and used for polymer solar cells (pscs). all polymers exhibit blue-shifted absorption spectra and deeper-lying homo energy levels compared to the previous carbazole-based skeleton analogues. in comparison with its analogous polymer with the same p-conjugated backbone, the polymer with alkoxy-substituted bt as the acceptor unit (psbt) shows an order of magnitude higher ofet mobility (1.8 x 10(-4) versus 1.25 x 10(-5) cm(2) v-1 s(-1)). an optimal device based on psbt: pc71bm (1/3 in wt%) delivers a respectable pce of 5.18% and a high v-oc of 0.94 v, all of which are superior to those of the carbazole-based analogue (pce = 3.7%, v-oc = 0.80 v) and greatly surpass the values of a previously reported dibenzothiophene-based polymer (pce = 0.76%, v-oc = 0.64 v). these results demonstrate that sdct is a promising building block for constructing photovoltaic polymers and the synthetic strategy developed herein can be used to prepare other dibenzothiophene-cored ladder-type heptacyclic units. |
| WOS关键词 | POLYMER SOLAR-CELLS ; POWER CONVERSION EFFICIENCY ; CONJUGATED POLYMERS ; ORGANIC PHOTOVOLTAICS ; ENHANCED EFFICIENCY ; SINGLE ; 2,1,3-BENZOTHIADIAZOLE ; MORPHOLOGY ; NETWORK ; BLENDS |
| WOS研究方向 | Materials Science ; Physics |
| WOS类目 | Materials Science, Multidisciplinary ; Physics, Applied |
| 语种 | 英语 |
| 出版者 | ROYAL SOC CHEMISTRY |
| WOS记录号 | WOS:000355560800004 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2376654 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Zheng, Qingdong |
| 作者单位 | 1.Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350002, Fujian, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Lixin,Cai, Dongdong,Tang, Changquan,et al. Improved synthesis and photovoltaic performance of donor-acceptor copolymers based on dibenzothiophene-cored ladder-type heptacyclic units[J]. Journal of materials chemistry c,2015,3(22):5631-5641. |
| APA | Wang, Lixin,Cai, Dongdong,Tang, Changquan,Wang, Meng,Yin, Zhigang,&Zheng, Qingdong.(2015).Improved synthesis and photovoltaic performance of donor-acceptor copolymers based on dibenzothiophene-cored ladder-type heptacyclic units.Journal of materials chemistry c,3(22),5631-5641. |
| MLA | Wang, Lixin,et al."Improved synthesis and photovoltaic performance of donor-acceptor copolymers based on dibenzothiophene-cored ladder-type heptacyclic units".Journal of materials chemistry c 3.22(2015):5631-5641. |
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来源：中国科学院大学
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