Tuning morphology and photovoltaic properties of diketopyrrolopyrrole- based small-molecule solar cells by taloring end-capped aromatic groups | |
Zhang, Shanlin1; Wang, Xue1,2; Tang, Ailing1; Huang, Jianhua1; Zhan, Chuanlang1; Yao, Jiannian1 | |
刊名 | PHYSICAL CHEMISTRY CHEMICAL PHYSICS
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2014 | |
卷号 | 16期号:10页码:4664-4671 |
ISSN号 | 1463-9076 |
DOI | 10.1039/c3cp54548b |
英文摘要 | In this article, we selected BDT-DPP-BDT (DPP = diketopyrrolopyrrole and BDT = 4,8-di-2-(2-ethylhexyl)-thienyl- benzo[1,2-b:4,5-b']dithiophene) as the model backbone and end-capped it with hydrogen, octyl 2-cyano-3-(thiophen-2-yl)acrylate (CNR), and 2-hexylbithiophene (HTT), respectively, forming three small molecule donors: BDB, CNRBDB and HTTBDB. Introduction of a polar and planar electron-withdrawing unit of CNR to both ends of the BDB backbone enhances the hole mobility from 4.14 x 10(-4) to 7.75 x 10(-3) cm(2) V-1 s(-1) and raises the fill factor from 27 to 57% when blended with PC71BM. This is associated with the PC71BM phase size decreasing from 70 to 20 nm. When the electrondonating unit of HTT with poorer planarity is linked to both ends of the BDB backbone, both donor and acceptor phase sizes are decreased to 20 nm. The short-circuit current density is greatly improved from 4.22 to 9.66 mA cm(-2), and the fill factor is enhanced to 46%. Overall, this work demonstrates that the end-capped aromatic groups play an important role in tuning the phase size and photovoltaic properties of DPP-based small molecule solar cells. |
语种 | 英语 |
出版者 | ROYAL SOC CHEMISTRY |
WOS记录号 | WOS:000332393200026 |
内容类型 | 期刊论文 |
源URL | [http://ir.iccas.ac.cn/handle/121111/49969] ![]() |
专题 | 中国科学院化学研究所 |
通讯作者 | Zhan, Chuanlang |
作者单位 | 1.Chinese Acad Sci, Inst Chem, CAS Key Lab Photochem, Beijing Natl Lab Mol Sci, Beijing 100080, Peoples R China 2.QuFu Normal Univ, Key Lab Life Organ Anal, Qufu 273165, Peoples R China |
推荐引用方式 GB/T 7714 | Zhang, Shanlin,Wang, Xue,Tang, Ailing,et al. Tuning morphology and photovoltaic properties of diketopyrrolopyrrole- based small-molecule solar cells by taloring end-capped aromatic groups[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2014,16(10):4664-4671. |
APA | Zhang, Shanlin,Wang, Xue,Tang, Ailing,Huang, Jianhua,Zhan, Chuanlang,&Yao, Jiannian.(2014).Tuning morphology and photovoltaic properties of diketopyrrolopyrrole- based small-molecule solar cells by taloring end-capped aromatic groups.PHYSICAL CHEMISTRY CHEMICAL PHYSICS,16(10),4664-4671. |
MLA | Zhang, Shanlin,et al."Tuning morphology and photovoltaic properties of diketopyrrolopyrrole- based small-molecule solar cells by taloring end-capped aromatic groups".PHYSICAL CHEMISTRY CHEMICAL PHYSICS 16.10(2014):4664-4671. |
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