Investigation of electron transport properties in Li2CO3-doped Bepp(2) thin films

	Investigation of electron transport properties in Li2CO3-doped Bepp(2) thin films
	Wang,Y.P.; Qiao,X.F.; Yang,D.Z.; Huang,J.Y.; Chen,J.S.; Ma,D.G.; Dong,L.S.
刊名	organic electronics
	2015
卷号	26 页码:86-91
关键词	LIGHT-EMITTING-DIODES ORGANIC ELECTROLUMINESCENT DEVICES ADMITTANCE SPECTROSCOPY CARRIER MOBILITY VOLTAGE ALUMINUM LAYER COST
通讯作者	ma,dg
英文摘要	the admittance spectroscopy investigations showed that doping lithium carbonate (li2co3) into bi s[2-(2-hydroxyphenyl)-pyridine] beryllium (bepp(2)) greatly improved the electron mobility compared with the pure bepp(2) film. the electron mobility reaches the orders of similar to 10 (4) cm(2) v (1) s (1), almost independent of the electric field. the trap states at low frequencies were clearly observed by capacitance-frequency measurement. the current-voltage and current-thickness characteristics indicated the electron conduction of space-charge-limited current (sclc) with discrete trap distributions in the intermediate voltage and the sclc with exponential trap distribution at the higher voltage in the li2co3-doped bepp(2) film. we further estimated the density of trap states to be about 4.54 x 10(17) cm (3) by the temperature dependent current density characteristics. the investigation of ultraviolet photoemission spectroscopy (ups) and x-ray photoemission spectroscopy (xps) found that there occurs complicated chemical reaction between bepp(2) and li2co3, and the bepp(2) traps more electrons after li2co3 doping. this is an effective charge transfer between bepp(2) and li2co3, which greatly reduces the electron injection barrier and significantly enhances the electron mobility. (c) 2015 elsevier b.v. all rights reserved.
收录类别	SCI
语种	英语
公开日期	2016-05-31
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/67882]
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	Wang,Y.P.,Qiao,X.F.,Yang,D.Z.,et al. Investigation of electron transport properties in Li2CO3-doped Bepp(2) thin films[J]. organic electronics,2015,26:86-91.
APA	Wang,Y.P..,Qiao,X.F..,Yang,D.Z..,Huang,J.Y..,Chen,J.S..,...&Dong,L.S..(2015).Investigation of electron transport properties in Li2CO3-doped Bepp(2) thin films.organic electronics,26,86-91.
MLA	Wang,Y.P.,et al."Investigation of electron transport properties in Li2CO3-doped Bepp(2) thin films".organic electronics 26(2015):86-91.