Optical absorption spectra of ultrathin PTCDA films on gold single crystals: Charge transfer beyond the first monolayer

Organic Electronics

Volumn 10, Issue 8, 2009, Pages 1448-1453

  Forker, Roman ^a   Golnik, Christian ^a   Pizzi, Giovanni ^a   Dienel, Thomas ^a   Fritz, Torsten ^a  

^a DRESDEN UNIVERSITY OF TECHNOLOGY   (Germany)

Author keywords

Au(1 0 0); Au(1 1 1); Cations; Complex dielectric function; Differential reflectance spectroscopy; PTCDA

Indexed keywords

GOLD; LIGHT ABSORPTION; MONOLAYERS; ORGANOMETALLICS; POSITIVE IONS; SINGLE CRYSTALS; ULTRATHIN FILMS;

AU(1 1 1 ); COMPLEX DIELECTRIC FUNCTIONS; DIFFERENTIAL REFLECTANCE SPECTROSCOPY; EPITAXIALLY GROWN; INTERFACE DIPOLE; OPTICAL ABSORBANCE; POSITIVELY CHARGED; PTCDA;

CHARGE TRANSFER;

EID: 71849112364     PISSN: 15661199     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.orgel.2009.08.005     Document Type: Article

References (29)

1. Ishii H., Sugiyama K., Ito E., and Seki K. Energy level alignment and interfacial electronic structures at organic/metal and organic/organic interfaces. Adv. Mater. 11 (1999) 605-625
2. Kahn A., Koch N., and Gao W. Electronic structure and electrical properties of interfaces between metals and π-conjugated molecular films. J. Polym. Sci. Part B: Polym. Phys. 41 (2003) 2529-2548
3. Hwang J., Wan A., and Kahn A. Energetics of metal-organic interfaces: new experiments and assessment of the field. Mater. Sci. Eng., R 64 (2009) 1-31
4. Braun S., Salaneck W.R., and Fahlman M. Energy-level alignment at organic/metal and organic/organic interfaces. Adv. Mater. 21 (2009) 1450-1472
5. Picozzi S., Pecchia A., Gheorghe M., Di Carlo A., Lugli P., Delley B., and Elstner M. Schottky barrier height at an organic/metal junction: a first-principles study of PTCDA/X (X = Al, Ag) contacts. Phys. Rev. B 68 (2003) 195309
6. Duhm S., Gerlach A., Salzmann I., Bröker B., Johnson R.L., Schreiber F., and Koch N. PTCDA on Au(1 1 1), Ag(1 1 1) and Cu(1 1 1): correlation of interface charge transfer to bonding distance. Org. Electron. 9 (2008) 111-118
7. Chizhov I., Kahn A., and Scoles G. Initial growth of 3,4,9,10-perylenetetracarboxylic-dianhydride (PTCDA) on Au(1 1 1): a scanning tunneling microscopy study. J. Cryst. Growth 208 (2000) 449-458
8. Mannsfeld S., Toerker M., Schmitz-Hübsch T., Sellam F., Fritz T., and Leo K. Combined LEED and STM study of PTCDA growth on reconstructed Au(1 1 1) and Au(1 0 0) single crystals. Org. Electron. 2 (2001) 121-134
9. Wagner T., Bannani A., Bobisch C., Karacuban H., Stöhr M., Gabriel M., and Möller R. Growth of 3,4,9,10-perylenetetracarboxylic-dianhydride crystallites on noble metal surfaces. Org. Electron. 5 (2004) 35-43
10. Kilian L., Umbach E., and Sokolowski M. A refined structural analysis of the PTCDA monolayer on the reconstructed Au(1 1 1) surface - "rigid or distorted carpet?". Surf. Sci. 600 (2006) 2633-2643
11. McIntyre J.D.E., and Aspnes D.E. Differential reflection spectroscopy of very thin surface films. Surf. Sci. 24 (1971) 417-434
12. Forker R., and Fritz T. Optical differential reflectance spectroscopy of ultrathin epitaxial organic films. Phys. Chem. Chem. Phys. 11 (2009) 2142-2155
13. Nitsche R., and Fritz T. Determination of model-free Kramers-Kronig consistent optical constants of thin absorbing films from just one spectral measurement: application to organic semiconductors. Phys. Rev. B 70 (2004) 195432
14. Knupfer M. Exciton binding energies in organic semiconductors. Appl. Phys. A 77 (2003) 623-626
15. Romaner L., Nabok D., Puschnig P., Zojer E., and Ambrosch-Draxl C. Theoretical study of PTCDA adsorbed on the coinage metal surfaces, Ag(1 1 1), Au(1 1 1) and Cu(1 1 1). New J. Phys. 11 (2009) 053010
16. Proehl H., Nitsche R., Dienel T., Leo K., and Fritz T. In situ differential reflectance spectroscopy of thin crystalline films of PTCDA on different substrates. Phys. Rev. B 71 (2005) 165207
17. In: Weber M.J. (Ed). Handbook of Optical Materials (2003), CRC Press, Boca Raton
18. Djurišić A.B., Fritz T., and Leo K. Modeling the optical constants of organic thin films: application to 3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA). Opt. Commun. 183 (2000) 123-132
19. Proehl H., Dienel T., Nitsche R., and Fritz T. Formation of solid-state excitons in ultrathin crystalline films of PTCDA: from single molecules to molecular stacks. Phys. Rev. Lett. 93 (2004) 097403
20. Dienel T., Loppacher C., Mannsfeld S.C.B., Forker R., and Fritz T. Growth-mode-induced narrowing of optical spectra of an organic adlayer. Adv. Mater. 20 (2008) 959-963
21. Anderson P.W. Localized magnetic states in metals. Phys. Rev. 124 (1961) 41-53
22. Newns D.M. Self-consistent model of hydrogen chemisorption. Phys. Rev. 178 (1969) 1123-1135
23. Romaner L., Heimel G., Brédas J.-L., Gerlach A., Schreiber F., Johnson R.L., Zegenhagen J., Duhm S., Koch N., and Zojer E. Impact of bidirectional charge transfer and molecular distortions on the electronic structure of a metal-organic interface. Phys. Rev. Lett. 99 (2007) 256801
24. Tautz F.S., Eremtchenko M., Schaefer J.A., Sokolowski M., Shklover V., and Umbach E. Strong electron-phonon coupling at a metal/organic interface: PTCDA/Ag(1 1 1). Phys. Rev. B 65 (2002) 125405
25. Forker R., Kasemann D., Dienel T., Wagner C., Franke R., Müllen K., and Fritz T. Electronic decoupling of aromatic molecules from a metal by an atomically thin organic spacer. Adv. Mater. 20 (2008) 4450-4454
26. Ford W.E., Hiratsuka H., and Kamat P.V. Photochemistry of 3,4,9,10-perylenetetracarboxylic dianhydride dyes. 4. Spectroscopic and redox properties of oxidized and reduced forms of the bis(2,5-di-tert-butylphenyl)imide derivative. J. Phys. Chem. 93 (1989) 6692-6696
27. Kircher T., and Löhmannsröben H.-G. Photoinduced charge recombination reactions of a perylene dye in acetonitrile. Phys. Chem. Chem. Phys. 1 (1999) 3987-3992
28. Dienel T., Forker R., Leo K., and Fritz T. Optical differential reflectance spectroscopy of molecular thin films on a metal: evidence for strong oscillator strength increase. J. Phys. Chem. C 111 (2007) 14593-14596
29. Mauser H. Spectroscopy of chemical reaction kinetics. 1. Theory of isosbestic points. Z. Naturforsch. B23 (1968) 1021-1025