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	Molecular orientation and interface compatibility for high performance organic thin film transistor based on vanadyl phthalocyanine
	Li, Liqiang1,2; Tang, Qingxin1; Li, Hongxiang1; Hu, Wenping1
刊名	Journal of physical chemistry b
	2008-08-28
卷号	112期号:34页码:10405-10410
ISSN号	1520-6106
DOI	10.1021/jp800879g
通讯作者	Li, hongxiang(lhx@iccas.ac.cn)
英文摘要	Organic thin film field-effect transistors (otfts) with mobility up to 1.0 cm(2) v-1 s(-1) and on/off ratio of 10(6)- 10(8) as well as good environmental stability were demonstrated by using vanadyl phthalocyanine (vopc), a pyramid-like compound with an ultra closely pi-stacked structure. the high performance, remarkable stability, low price, easy availability and nontoxicity of von enabled it to be a promising candidate for otfts. furthermore, we found that the mobility of the devices on ots-modified si/sio2 substrates was 2 orders of magnitude higher than that of devices on si/sio2 substrates. significantly, the relationship between field effect property and insulator surface property was explained from two new aspects of distribution of molecular orientation and interface compatibility, which might provide not only a useful model to explain why the surface modification with ots could largely improve the field-effect performance but also a guide for rational optimization of device structure for higher performance. in addition, the field effect property of vopc devices under vacuum, i.e., the oxygen doping effect on the von devices, was measured. we found that the hole mobility decreased by several orders of magnitude with decreasing pressure. at a pressure below 10(-2) pa, the device on ots-modified substrates exhibited ambipolar conduction. these results indicated that the oxygen doping exerted essential effect on the field-effect property of vopc, which was clearly distinct from that observed for pentacene-based ofets.
WOS关键词	FIELD-EFFECT TRANSISTORS ; CRYSTAL-STRUCTURE ; OXOTITANIUM(IV) PHTHALOCYANINE ; COPPER-PHTHALOCYANINE ; CONJUGATED OLIGOMERS ; TRANSPORT-PROPERTIES ; CHARGE-TRANSPORT ; GATE DIELECTRICS ; MOBILITY ; CHANNEL
WOS研究方向	Chemistry
WOS类目	Chemistry, Physical
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000258633400005
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2386971
专题	中国科学院大学
通讯作者	Li, Hongxiang
作者单位	1.Chinese Acad Sci, Inst Chem, Key Lab Organ Solids, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Li, Liqiang,Tang, Qingxin,Li, Hongxiang,et al. Molecular orientation and interface compatibility for high performance organic thin film transistor based on vanadyl phthalocyanine[J]. Journal of physical chemistry b,2008,112(34):10405-10410.
APA	Li, Liqiang,Tang, Qingxin,Li, Hongxiang,&Hu, Wenping.(2008).Molecular orientation and interface compatibility for high performance organic thin film transistor based on vanadyl phthalocyanine.Journal of physical chemistry b,112(34),10405-10410.
MLA	Li, Liqiang,et al."Molecular orientation and interface compatibility for high performance organic thin film transistor based on vanadyl phthalocyanine".Journal of physical chemistry b 112.34(2008):10405-10410.

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