An A-D-A Type Small-Molecule Electron Acceptor with End-Extended Conjugation for High Performance Organic Solar Cells

	An A-D-A Type Small-Molecule Electron Acceptor with End-Extended Conjugation for High Performance Organic Solar Cells
	Feng, Huanran 1,2; Qiu, Nailiang 1,2; Wang, Xian 3; Wang, Yunchuang 1,2; Kan, Bin 1,2; Wan, Xiangjian 1,2; Zhang, Mingtao 1,2; Xia, Andong 3; Li, Chenxi 1,2; Liu, Feng 4
刊名	CHEMISTRY OF MATERIALS
	2017-09-26
卷号	29 期号:18 页码:7908-7917
英文摘要	A new non-fullerene small molecule with an acceptor-donor-acceptor (A-D-A) structure, FDNCTF, incorporating fluorenedicyclopentathiophene as core and naphthyl-fused indanone as end groups, was designed and synthesized. Compared with the previous molecule FDICTF with the phenyl-fused indanone as the end groups, the extended pi-conjugation at the end group has only little impact on its molecular orbital energy levels, and thus, the open-circuit voltage (V-oc) of its solar cell devices has been kept high. However, its light absorption and mobility, together with the short-current density (J(sc)) and the fill factor (FF), of its devices have been all improved simultaneously. Through morphology, transient absorption, and theoretical studies, it is believed that these favorable changes are caused by (1) the appropriately enhanced molecular interaction between donor/acceptor which makes the charge separation at the interface more efficient, and (2) enhanced light absorption and more ordered packing at solid state, all due to the extended end-group conjugation of this molecule. With these, the solar cells with FDNCTF as the acceptor and a wide band gap polymer PBDB-T as the donor demonstrated a high power conversion efficiency (PCE) of 11.2% with an enhanced J(sc) and a maintained high V-oc, and significantly improved FF of 72.7% compared with that of the devices of FDICTF with the phenyl-fused indanone as the end groups. These results indicate that the unexplored conjugation size of the end group plays a critic role for the performance of their solar cell devices.
语种	英语
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/41088]
专题	化学研究所_光化学实验室
作者单位	1.Nankai Univ, Coll Chem, Ctr Nanoscale Sci & Technol, State Key Lab Elementoorgan Chem, Tianjin 300071, Peoples R China 2.Nankai Univ, Coll Chem, Key Lab Funct Polymer Mat, Tianjin 300071, Peoples R China 3.Chinese Acad Sci, Inst Chem, Key Lab Photochem, BNLMS, Beijing 100190, Peoples R China 4.Shanghai Jiao Tong Univ, Dept Phys & Astron, Shanghai 200240, Peoples R China
推荐引用方式 GB/T 7714	Feng, Huanran,Qiu, Nailiang,Wang, Xian,et al. An A-D-A Type Small-Molecule Electron Acceptor with End-Extended Conjugation for High Performance Organic Solar Cells[J]. CHEMISTRY OF MATERIALS,2017,29(18):7908-7917.
APA	Feng, Huanran.,Qiu, Nailiang.,Wang, Xian.,Wang, Yunchuang.,Kan, Bin.,...&Chen, Yongsheng.(2017).An A-D-A Type Small-Molecule Electron Acceptor with End-Extended Conjugation for High Performance Organic Solar Cells.CHEMISTRY OF MATERIALS,29(18),7908-7917.
MLA	Feng, Huanran,et al."An A-D-A Type Small-Molecule Electron Acceptor with End-Extended Conjugation for High Performance Organic Solar Cells".CHEMISTRY OF MATERIALS 29.18(2017):7908-7917.