Synthesis and photovoltaic properties of low bandgap dimeric perylene diimide based non-fullerene acceptors

	Synthesis and photovoltaic properties of low bandgap dimeric perylene diimide based non-fullerene acceptors
	Zhang, Xin ; Yao, Jiannian ; Zhan, Chuanlang 1
刊名	SCIENCE CHINA-CHEMISTRY
	2016-02-01
卷号	59 期号:2 页码:209-217
关键词	non-fullerene acceptor organic photovoltaic cell perylene diimide solution-processed bulk-heterojunction
英文摘要	Non-fullerene organic acceptors have attracted increasing attention in recent years. One of the challenges in the synthesis of non-fullerene organic acceptors is to tune the absorption spectrum and molecular frontier orbitals, affording low bandgap molecules with improved absorption of the near-infrared solar photons. In this paper, we present the synthesis, optoelectronic and photovoltaic properties of a series of dimeric perylene diimide (PDI) based non-fullerene acceptors. These PDI dimers are bridged by oligothiophene (T) from 1T to 6T. With the increase of the oligothienyl size, the highest occupied molecular orbital (HOMO) energy is raised from -5.65 to -5.10 eV, while that of the lowest unoccupied molecular orbit (LUMO) is kept constant at -3.84 eV, affording narrow bandgap from 1.81 to 1.26 eV. The absorption from the oligothiophene occurs between 350 and 500 nm, which is complementary to that from its bridged PDI units, leading to a wide spectral coverage from 350 to 850 nm. The optimal dihedral angle between the bridged two perylene planes is dependent on the oligothienyl size, varying from 5A degrees to 30A degrees. The solubility of the dimers depends on the oligothienyl size and can be tuned by the alkyl chains on the bridged thienyl units. The possible applications as the solution-processable non-fullerene organic acceptor is primarily studied using commercial P3HT as the blend donor. The photovoltaic results indicate that 1T, 4T and 6T all yield a higher efficiency of 1.2%, whereas 2T, 3T and 5T all give a lower efficiency of < 0.5%. The difference in the cell performance is related with the tradeoff between the differences of absorption, HOMO level and film-morphology between these dimers.
收录类别	SCI
语种	英语
公开日期	2016-05-09
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/30121]
专题	化学研究所_光化学实验室
作者单位	1.Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Key Lab Photochem, Beijing 100190, Peoples R China 3.Chinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Xin,Yao, Jiannian,Zhan, Chuanlang. Synthesis and photovoltaic properties of low bandgap dimeric perylene diimide based non-fullerene acceptors[J]. SCIENCE CHINA-CHEMISTRY,2016,59(2):209-217.
APA	Zhang, Xin,Yao, Jiannian,&Zhan, Chuanlang.(2016).Synthesis and photovoltaic properties of low bandgap dimeric perylene diimide based non-fullerene acceptors.SCIENCE CHINA-CHEMISTRY,59(2),209-217.
MLA	Zhang, Xin,et al."Synthesis and photovoltaic properties of low bandgap dimeric perylene diimide based non-fullerene acceptors".SCIENCE CHINA-CHEMISTRY 59.2(2016):209-217.