Influence of intramolecular polar bonds on interface energetics in perfluoro-pentacene on Ag(111)

被引：66

作者：

Duhm, Steffen ^{[1
]}

Hosoumi, Shunsuke ^{[1
]}

Salzmann, Ingo ^{[2
]}

Gerlach, Alexander ^{[3
]}

Oehzelt, Martin ^{[4
]}

Wedl, Bernhard ^{[2
,5
]}

Lee, Tien-Lin ^{[6
]}

Schreiber, Frank ^{[3
]}

Koch, Norbert ^{[2
]}

Ueno, Nobuo ^{[1
]}

Kera, Satoshi ^{[1
]}

机构：

[1] Chiba Univ, Grad Sch Adv Integrat Sci, Inage Ku, Chiba 2638522, Japan

[2] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany

[3] Univ Tubingen, Inst Angew Phys, D-72076 Tubingen, Germany

[4] Univ Linz, Inst Expt Phys, A-4040 Linz, Austria

[5] Graz Univ Technol, Inst Festkorperphys, A-8010 Graz, Austria

[6] European Synchrotron Radiat Facil, F-38043 Grenoble 9, France

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 04期

基金：

奥地利科学基金会;

关键词：

ENERGY-LEVEL ALIGNMENT; MOLECULAR-BEAM DEPOSITION; ORGANIC THIN-FILMS; ELECTRONIC-STRUCTURE; GROWTH; CONFORMATION; GRAPHITE; DIPOLE; STATES;

D O I：

10.1103/PhysRevB.81.045418

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigated the structural and electronic properties of vacuum sublimed perfluoro-pentacene (PFP) thin films on Ag(111) substrates using x-ray standing waves (XSW), x-ray diffraction (XRD) and ultraviolet photoelectron spectroscopy (UPS). XSW results reveal a flat adsorption geometry of the monolayer PFP/Ag(111) with a relatively large bonding distance of 3.16 angstrom for both, the carbon and fluorine atoms. Multilayers PFP/Ag(111) adopt a herringbone structure with the molecular long axis parallel to the substrate and a vertical lattice spacing of 3.06 angstrom as evidenced by XRD. The strong intramolecular polar bond character of the fluorine-carbon bonds in PFP leads to an orientation dependent ionization energy (IE) that is experimentally observed by UPS for the monolayer-multilayer transition: The inclined molecular plane orientation in the multilayer herringbone arrangement leads to an increase of the PFP IE by >0.4 eV compared to the flat lying monolayer.

引用

页数：6

共 59 条

[1] Exchangelike effects for closed-shell adsorbates:: Interface dipole and work function -: art. no. 096104 [J].

Bagus, PS ;

Staemmler, V ;

Wöll, C .

PHYSICAL REVIEW LETTERS, 2002, 89 (09) :961041-961044

[2] Importance of dewetting in organic molecular-beam deposition:: Pentacene on gold [J].

Beernink, G ;

Strunskus, T ;

Witte, G ;

Wöll, C .

APPLIED PHYSICS LETTERS, 2004, 85 (03) :398-400

[3] Electronic states of a single layer of pentacene: Standing-up and flat-lying configurations [J].

Betti, Maria Grazia ;

Kanjilal, Aloke ;

Mariani, Carlo .

JOURNAL OF PHYSICAL CHEMISTRY A, 2007, 111 (49) :12454-12457

[4] Energy-Level Alignment at Organic/Metal and Organic/Organic Interfaces [J].

Braun, Slawomir ;

Salaneck, William R. ;

Fahlman, Mats .

ADVANCED MATERIALS, 2009, 21 (14-15) :1450-1472

[5] Hyperthermal molecular beam deposition of highly ordered organic thin films [J].

Casalis, L ;

Danisman, MF ;

Nickel, B ;

Bracco, G ;

Toccoli, T ;

Iannotta, S ;

Scoles, G .

PHYSICAL REVIEW LETTERS, 2003, 90 (20) :4

[6] Molecular Orientation-Dependent Ionization Potential of Organic Thin Films [J].

Chen, Wei ;

Huang, Han ;

Chen, Shi ;

Huang, Yu Li ;

Gao, Xing Yu ;

Wee, Andrew Thye Shen .

CHEMISTRY OF MATERIALS, 2008, 20 (22) :7017-7021

[7] Molecular Orientation Dependent Energy Level Alignment at Organic-Organic Heterojunction Interfaces [J].

Chen, Wei ;

Qi, Dong Chen ;

Huang, Yu Li ;

Huang, Han ;

Wang, Yu Zhan ;

Chen, Shi ;

Gao, Xing Yu ;

Wee, Andrew Thye Shen .

JOURNAL OF PHYSICAL CHEMISTRY C, 2009, 113 (29) :12832-12839

[8] Characterization of the interface dipole at organic/metal interfaces [J].

Crispin, X ;

Geskin, V ;

Crispin, A ;

Cornil, J ;

Lazzaroni, R ;

Salaneck, WR ;

Brédas, JL .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2002, 124 (27) :8131-8141

[9] Spontaneous charge transfer at organic-organic homointerfaces to establish thermodynamic equilibrium [J].

Duhm, S. ;

Glowatzki, H. ;

Rabe, J. P. ;

Koch, N. ;

Johnson, R. L. .

APPLIED PHYSICS LETTERS, 2007, 90 (12)

[10] Influence of alkyl chain substitution on sexithienyl-metal interface morphology and energetics [J].

Duhm, S. ;

Glowatzki, H. ;

Rabe, J. P. ;

Koch, N. ;

Johnson, R. L. .

APPLIED PHYSICS LETTERS, 2006, 88 (20)

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