Unexpected Opposite Influences of Para vs Ortho Backbone Fluorination on the Photovoltaic Performance of a Wide-Bandgap Conjugated Polymer
文献类型：期刊论文
| 作者 | Cai, Mian1,2; Bao, Xichang1 ; Liu, Yan Fang1; Li, Chenchen1,2; Wang, Xiao1; Lan, Zhenggang1; Yang, Renqiang1; Wan, Xiaobo1,2; Zhenggang Lan,Renqiang Yang and Xiaobo Wan
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| 刊名 | CHEMISTRY OF MATERIALS
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| 出版日期 | 2017-11-14 |
| 卷号 | 29期号:21页码:9162-9170 |
| DOI | 10.1021/acs.chemmater.7b03025 |
| 文献子类 | Article |
| 英文摘要 | Fluorination density and regioregularity are known factors that have high impact on the performance of organic solar cells; however, due to the limited available fluorination positions, the influence of backbone fluorination positions (such as ortho, para, and meta) has not been well studied. Here we disclose that the fluorination position on a conjugated polymer backbone may have completely opposite effects on its performance. Specifically, compared to the nonfluorinated control, Devices fabricated with the conjugated polymer based on para-fluorinated dibenzo[c,h][2,6]-naphthyridine-5,11-(6H,12H)-dione (DBND) block exhibit improved power conversion efficiencies (PCEs) up to 6.55%, while devices fabricated with the conjugated polymer based on ortho-fluorinated DBND block exhibit much worse PCEs as low as 1.44%, although both polymers have similar HOMO/LUMO levels, bandgaps, and backbone torsion angles. It is found that different fluorination positions result in different dipole moments, intermolecular binding energies, and syn/anti conformer ratios, which eventually lead to the distinct phase-separation behaviors of the corresponding solar cells. |
| WOS关键词 | POWER CONVERSION EFFICIENCY ; HETEROJUNCTION SOLAR-CELLS ; DONOR-ACCEPTOR POLYMERS ; BUILDING-BLOCK ; ELECTRONIC-PROPERTIES ; EXCEEDING 9-PERCENT ; COPOLYMERS ; DERIVATIVES ; ISOINDIGO ; DESIGN |
| WOS研究方向 | Chemistry ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000415911600028 |
| 资助机构 | National Science Foundation of China(NSFC51573204 ; Youth Innovation Promotion Association CAS(2016194) ; 21402220 ; 21607164 ; 51573205) |
| 源URL | [http://ir.qibebt.ac.cn/handle/337004/9826]  |
| 专题 | 青岛生物能源与过程研究所_先进有机功能材料团队 |
| 通讯作者 | Zhenggang Lan,Renqiang Yang and Xiaobo Wan |
| 作者单位 | 1.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, CAS Key Lab Biobased Mat, 189 Songling Rd, Qingdao 266101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cai, Mian,Bao, Xichang,Liu, Yan Fang,et al. Unexpected Opposite Influences of Para vs Ortho Backbone Fluorination on the Photovoltaic Performance of a Wide-Bandgap Conjugated Polymer[J]. CHEMISTRY OF MATERIALS,2017,29(21):9162-9170. |
| APA | Cai, Mian.,Bao, Xichang.,Liu, Yan Fang.,Li, Chenchen.,Wang, Xiao.,...&Zhenggang Lan,Renqiang Yang and Xiaobo Wan.(2017).Unexpected Opposite Influences of Para vs Ortho Backbone Fluorination on the Photovoltaic Performance of a Wide-Bandgap Conjugated Polymer.CHEMISTRY OF MATERIALS,29(21),9162-9170. |
| MLA | Cai, Mian,et al."Unexpected Opposite Influences of Para vs Ortho Backbone Fluorination on the Photovoltaic Performance of a Wide-Bandgap Conjugated Polymer".CHEMISTRY OF MATERIALS 29.21(2017):9162-9170. |
入库方式： OAI收割
来源：青岛生物能源与过程研究所
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