Charge Transport Mechanism of Oligo(p-phenylene vinylene)s Based Molecualr Wires

	Charge Transport Mechanism of Oligo(p-phenylene vinylene)s Based Molecualr Wires
	Yao, Chuan ; Lu, Qi ; Wang, Xian-hong
刊名	高分子学报 acta polymerica sinica
	2014
卷号	47 期号:12 页码:1659-1668
关键词	ELECTRONIC JUNCTIONS CONDUCTANCE TRANSITION
通讯作者	wang,xh
英文摘要	to understand the charge transport mechanism of oligo (p-phenylene vinylene) (opv) molecular wires, twelve opv molecular wires were synthesized, whose anchoring groups were thioacetyl (sac) and amine (nh2), respectively. conductive probe-atomic force microscopy and scanning tunneling microscopy-break junction (stm-bj) methods were employed for the characterization of the electron transport properties of these opv wires. a detailed analysis of the single-molecular resistance as a function of molecular length, temperature as well as electric field,revealed a clear transition of charge transport mechanism from tunneling to hopping at a critical length of 2 nm. the effect of anchoring groups on the charge transport properties was investigated by comparing the single-molecular conductance of opv wires terminated with dithioacetyl and diamine groups. the results showed that the anchoring groups indeed affect the contact resistance, but they do not change the intrinsic charge transport mechanism. moreover, the electronic properties of the opv wires were studied theoretically using a combination of density functional theory and non-equilibrium green' s functions method. the calculated results demonstrated that the energy difference between the frontier molecular orbitals and the metal fermi level played an important role in controlling the conduction mechanism of the opv wires.
收录类别	SCI
语种	英语
WOS记录号	WOS:000347020400014
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/57562]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	Yao, Chuan,Lu, Qi,Wang, Xian-hong. Charge Transport Mechanism of Oligo(p-phenylene vinylene)s Based Molecualr Wires[J]. 高分子学报 acta polymerica sinica,2014,47(12):1659-1668.
APA	Yao, Chuan,Lu, Qi,&Wang, Xian-hong.(2014).Charge Transport Mechanism of Oligo(p-phenylene vinylene)s Based Molecualr Wires.高分子学报 acta polymerica sinica,47(12),1659-1668.
MLA	Yao, Chuan,et al."Charge Transport Mechanism of Oligo(p-phenylene vinylene)s Based Molecualr Wires".高分子学报 acta polymerica sinica 47.12(2014):1659-1668.