Orthogonal solubility in fully conjugated donor-acceptor block copolymers: Compatibilizers for polymer/fullerene bulk-heterojunction solar cells

	Orthogonal solubility in fully conjugated donor-acceptor block copolymers: Compatibilizers for polymer/fullerene bulk-heterojunction solar cells
	Wang, Shi-fan 1,2; Liu, Ya-nan 1,2; Yang, Jie 1,2,3; Tao, You-tian 1,2; Guo, Yan 4; Cao, Xu-dong 1,2; Zhang, Zhi-guo 3; Li, Yong-fang 3; Huang, Wei 1,2
刊名	CHINESE JOURNAL OF POLYMER SCIENCE
	2017-02-01
卷号	35 期号:2 页码:207-218
关键词	Block Copolymers Donor Acceptor Bulk Heterojunction Solar Cells Compatibilizer
英文摘要	Donor-acceptor (D-A) type fully conjugated block copolymer systems have been rarely reported due to the challenges in synthetic approaches to prepare well-defined low-polydispersity products. In this work, fully conjugated block copolymers are synthesized in a one-pot reaction through Stille coupling polycondensation, by utilizing the end-functional polymer copolymerization method. End-functional P3HT are copolymerized with AA (2,7-dibromo-9-(heptadecan-9-yl)-9H-carbazole) and BB (4,7-bis(5-(trimethylstannyl)thiophen-2-yl)benzo[c][1,2,5]thiadiazole, TBT) type monomers, respectively. The orthogonal solubility between the very soluble P3HT donor and the insoluble PCDTBT acceptor block improves the purity of block copolymers as well as distinct nano-scale phase-separation compared with other reports on miscibility of donor and acceptor polymer block. Further purification via preparative GPC is carried out to remove the excess of unreacted P3HT and free PCDTBT as well as to achieve low polydispersity of block copolymers. The chemical structure of the P3HT-b-PCDTBT block copolymers are verified via H-1-NMR, and further confirmed by FTIR spectra. The block copolymer shows broad absorption and moderate optical band gap of 1.8 eV. Furthermore, the fully conjugated block copolymer films exhibit significant fine structures, much smoother film morphology compared to P3HT/PCDTBT polymer blends. By adding a small amount of block copolymer P3HT-b-PCDTBT as a compatibilizer into the bulk-heterojunction of P3HT:PC61BM blends, polymer solar cells with an 8% increase of short circuit current (J (sc) and 10% increase of power conversion efficiency (PCE) are achieved owing to the improvement of the active-layer film morphology. To the best of our knowledge, this is the first report on donor-acceptor type fully conjugated block copolymer as an effective ternary additive in polymer: fullerene bulk heterojunction solar cells.
语种	英语
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/38028]
专题	化学研究所_有机固体实验室
作者单位	1.Nanjing Tech Univ Nanjing Tech, Key Lab Flexible Elect KLOFE, Nanjing 211816, Jiangsu, Peoples R China 2.Nanjing Tech Univ Nanjing Tech, IAM, Jiangsu Natl Synerget Innovat Ctr Adv Mat SICAM, Nanjing 211816, Jiangsu, Peoples R China 3.Chinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China 4.Coll Engn & Appl Sci, Dept Biomed Engn, Nanjing 210093, Peoples R China
推荐引用方式 GB/T 7714	Wang, Shi-fan,Liu, Ya-nan,Yang, Jie,et al. Orthogonal solubility in fully conjugated donor-acceptor block copolymers: Compatibilizers for polymer/fullerene bulk-heterojunction solar cells[J]. CHINESE JOURNAL OF POLYMER SCIENCE,2017,35(2):207-218.
APA	Wang, Shi-fan.,Liu, Ya-nan.,Yang, Jie.,Tao, You-tian.,Guo, Yan.,...&Huang, Wei.(2017).Orthogonal solubility in fully conjugated donor-acceptor block copolymers: Compatibilizers for polymer/fullerene bulk-heterojunction solar cells.CHINESE JOURNAL OF POLYMER SCIENCE,35(2),207-218.
MLA	Wang, Shi-fan,et al."Orthogonal solubility in fully conjugated donor-acceptor block copolymers: Compatibilizers for polymer/fullerene bulk-heterojunction solar cells".CHINESE JOURNAL OF POLYMER SCIENCE 35.2(2017):207-218.