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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
2008-08-28
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY B
ISSN1520-6106
Volume112Issue:34Pages:10405-10410
AbstractOrganic 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.
DOI10.1021/jp800879g
Indexed BySCI
Language英语
WOS IDWOS:000258633400005
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:49[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/63886
Collection中国科学院化学研究所
Corresponding AuthorLi, Hongxiang
Affiliation1.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
Recommended Citation
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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