Interface electronic structure and morphology of 2,7-dioctyl[1]benzothieno[3,2-b]benzothiophene (C8-BTBT) on Au film

被引：18

作者：

Wang, Shitan ^{[1
,2
]}

Niu, Dongmei ^{[1
,2
]}

Lyu, Lu ^{[1
,2
,3
,4
]}

Huang, Yingbao ^{[1
,2
]}

Wei, Xuhui ^{[1
,2
]}

Wang, Can ^{[1
,2
]}

Xie, Haipeng ^{[1
,2
]}

Gao, Yongli ^{[1
,2
,5
]}

机构：

[1] Cent S Univ, Sch Phys & Elect, Inst Super Microstruct & Ultrafast Proc Adv Mat, Changsha 410083, Hunan, Peoples R China

[2] Cent S Univ, Sch Phys & Elect, Hunan Key Lab Super Microstruct & Ultrafast Proc, Changsha 410083, Hunan, Peoples R China

[3] Univ Kaiserslautern, Dept Phys, Erwin Schrodinger Str 46, D-67663 Kaiserslautern, Germany

[4] Univ Kaiserslautern, Res Ctr OPTIMAS, Erwin Schrodinger Str 46, D-67663 Kaiserslautern, Germany

[5] Univ Rochester, Dept Phys & Astron, Rochester, NY 14627 USA

来源：

APPLIED SURFACE SCIENCE | 2017年 / 416卷

基金：

中国国家自然科学基金; 美国国家科学基金会;

关键词：

Photoemission spectroscopy(PES); Atomic force microscopy (AFM); Interface; C8-BTBT; Au film; ENERGY-LEVEL ALIGNMENT; MOLECULAR-ORIENTATION; ORGANIC SEMICONDUCTORS; THIN-FILMS; TRANSISTORS; MOBILITIES; PENTACENE; BARRIER; MEMORY;

D O I：

10.1016/j.apsusc.2017.04.219

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The interfacial electronic structure and morphology of 2,7-dioctyl[1] benzothieno[3,2b] benzothiophene (C8-BTBT) on polycrystalline Au film was investigated with photoemission spectroscopy (PES), atomic force microscopy (AFM) and grazing incidence X-ray diffraction (GIXRD). The transport barriers of holes and electrons at the interface are 1.72 eV and 2.12 eV, respectively, from the UPS measurement. There is no chemical reaction of C8-BTBT with Au from the XPS investigation of core levels Au 4f, C 1s and S 2p. The upmost molecules adopt a standing up configuration deduced from the diffraction peaks in GIXRD and the step height in AFM. Increasing order of the upright orientation of C8-BTBT molecules with film growth result in decreasing work function of the C8-BTBT thin film by forming an outward pointing dipole layer with the ordered end C-H bonds. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：696 / 703

页数：8

共 54 条

[51] Thickness-Dependent Air-Exposure-Induced Phase Transition of CuPc Ultrathin Films to Well-Ordered One-Dimensional Nanocrystals on Layered Substrates [J].