Unexpected Opposite Influences of Para vs Ortho Backbone Fluorination on the Photovoltaic Performance of a Wide-Bandgap Conjugated Polymer | |
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 | |
2017-11-14 | |
发表期刊 | CHEMISTRY OF MATERIALS |
卷号 | 29期号:21页码:9162-9170 |
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. |
文章类型 | Article |
WOS标题词 | Science & Technology ; Physical Sciences ; Technology |
DOI | 10.1021/acs.chemmater.7b03025 |
关键词[WOS] | POWER CONVERSION EFFICIENCY ; HETEROJUNCTION SOLAR-CELLS ; DONOR-ACCEPTOR POLYMERS ; BUILDING-BLOCK ; ELECTRONIC-PROPERTIES ; EXCEEDING 9-PERCENT ; COPOLYMERS ; DERIVATIVES ; ISOINDIGO ; DESIGN |
收录类别 | SCI |
语种 | 英语 |
WOS研究方向 | Chemistry ; Materials Science |
项目资助者 | National Science Foundation of China(NSFC51573204 ; Youth Innovation Promotion Association CAS(2016194) ; 21402220 ; 21607164 ; 51573205) |
WOS类目 | Chemistry, Physical ; Materials Science, Multidisciplinary |
WOS记录号 | WOS:000415911600028 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.qibebt.ac.cn/handle/337004/9826 |
专题 | 先进有机功能材料研究组 |
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. |
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文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
Unexpected opposite (568KB) | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 浏览 下载 | |
2017-ortho and para (4832KB) | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 浏览 下载 |
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