Abstract
Band alignment at metal/organic (MO) and organic/organic (OO) interfaces is discussed within a unified Induced Density of Interface States (IDIS) model, which incorporates most of the effects that can be expected to operate at weakly interacting organic interfaces: compression of the metal electron tails due to Pauli repulsion, orientation of molecular dipoles and electron charge transfer between the two media. This last mechanism tends to align the Charge Neutrality Level (CNL) of the organic material and the metal Fermi level (EF): electron charge transfer reduces the initial misalignment between the CNL and the metal work function (πM-CNL) to S(πM-CNL), where S is the interface screening parameter which is shown to also screen the ‘Pauli’ and molecular interface dipoles. Results for several Au/organic and organic/organic interfaces are presented and discussed. PACS numbers: 79.60.Jv, 79.60.Dp, 73.40.Gk, 73.20.-r
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
Similar content being viewed by others
References
Conjugated Polymer and Molecular Interfaces, edited by W. R. Salaneck, K. Seki, A. Kahn, and J. J. Pireaux (Marcel Dekker, New York, 2001).
W.R. Salaneck, S. Stafström and J.L.Brédas, Conjugated Polymer Surfaces and Interfaces: Electronic and Chemical Structure of Interfaces for Polymer Light emitting Diodes, Cambridge University Press, Cambridge (1996).
N. Koch, Chem. Phys. Chem. 8 1438 (2007).
J. C. Scott, J. Vac. Sci. Technol. A 21 521 (2003).
C. Shen, A. Kahn, and I. G. Hill: in Conjugated Polymer and Molecular Interfaces, edited by W. R. Salaneck, K. Seki, A. Kahn, and J. J. Pireaux (Marcel Dekker, New York, 2001), pp. 293–350.
C. Shen, A. Kahn, and I. G. Hill, in Conjugated Polymer and Molecular Interfaces, edited by W. R. Salaneck, K. Seki, A. Kahn, and J. J. Pireaux (Marcel Dekker, New York, 2001), pp. 351–400.
D. Cahen, A. Kahn, and E. Umbach, Mater. Today 8 32 (2005).
H. Ishii, K. Sugiyama, E. Ito, and K. Seki, Adv. Mater. (Weinheim, Ger.) 11 605 (1999).
S. Narioka, H. Ishii, D. Yoshimura, M. Sei, Y. Ouchi, K. Seki, S. Hasegawa, T. Miyazaki, Y. Harima and K. Yamashita, Appl. Phys. Lett. 67 1899 (1995).
I. G. Hill, A. Rajagopal, A. Kahn and Y. Hu, Appl. Phys. Lett. 73 662 (1998).
I. G. Hill, J. Schwartz, and A. Kahn, Org. Electron. 1 5 (2000).
C. Shen and A. Kahn, Org. Electron. 2 89 (2001).
X. Crispin, V. Geskin, A. Crispin, J. Cornil, R. Lazzaroni, W. R. Salaneck and J. L. Brédas, J. Am. Chem. Soc. 124 8131 (2002).
M. Eremtchenko, D. Bauer, J. A. Schaefer and F. S. Tautz, New J. Phys. 6 4 (2004).
S. Kera, Y. Yabuuchi, H. Yamane, H. Setoyama, K. K. Okudaira, A. Kahn and N. Ueno, Phys. Rev. B 70 085304 (2004).
M. Knupfer and G. Paasch, J. Vac. Sci. Tech. A 23 1072 (2005).
P. S. Bagus, V. Staemmler, and C. Wöll, Phys. Rev. Lett. 89 096104 (2002).
G. Witte, S. Lukas, P. S. Bagus and C. Wöll, Appl. Phys. Lett. 87 263502 (2005).
H. Vázquez, Y. J. Dappe, J. Ortega and F. Flores, J. Chem. Phys., J. Chem. Phys. 126 144703 (2007).
H. Vázquez, R. Oszwaldowski, P. Pou, J. Ortega, R. Pérez, F. Flores, and A. Kahn, Europhys. Lett. 65 802 (2004).
H. Vázquez, F. Flores, R. Oszwaldowski, J. Ortega, R. Pérez, and A. Kahn, Appl. Surf. Sci. 234 108 (2004).
R. Oszwaldowski, H. Vázquez, P. Pou, J. Ortega, R. Pérez and F. Flores, J. Phys.: Condens. Matter 15, S2665 (2003).
H. Vázquez, W. Gao, F. Flores and A. Kahn, Phys. Rev. B 71 041306(R) (2005).
M. G. Betti, A. Kanjilal, C. Mariani, H. Vázquez, Y. J. Dappe, J. Ortega and F. Flores, Phys. Rev. Lett. 100 027601 (2008).
L. Pauling, The Nature of the Chemical Bond (Cornell University Press, Ithaca, NY, 1960), 3rd edition.
P. Fenter, F. Schreiber, L. Zhou, P. Eisenberger and S. R. Forrest, Phys. Rev. B 56, 3046 (1997).
S. M. Sze. Physics of Semiconductor Devices (John Wiley, New York, 1981).
C. Tejedor, F. Flores and E. Louis, J. Phys. C: Solid State Phys. 10 2163 (1977).
J. Topping, Proc. R. Soc. London, Ser. A 114, 67 (1927).
O. V. Molodtsova, M. Grobosch, M. Knupfer and V. Yu. Aristov, Appl. Phys. Lett. 91 244103 (2007).
J. Tersoff, Phys. Rev. B 32 R6968 (1985).
S. Yanagisawa, Y. Morikawa, Chem. Phys. Lett. 420 523 (2006).
I.G. Hill, D. Milliron, J. Schwartz and A. Kahn, Appl. Surf. Sci. 166 354 (2000).
H. Vázquez, F. Flores and A. Kahn, Org. Electron. 8 241 (2007).
S. Braun, W. Osikowicz, Y. Wang and W.R. Salaneck, Org. Electron. 8 14 (2007).
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2009 Springer-Verlag Berlin Heidelberg
About this chapter
Cite this chapter
Flores, F., Ortega, J., Vázquez, H. (2009). Band Alignment in Organic Materials. In: Haug, R. (eds) Advances in Solid State Physics. Advances in Solid State Physics, vol 48. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-85859-1_17
Download citation
DOI: https://doi.org/10.1007/978-3-540-85859-1_17
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-85858-4
Online ISBN: 978-3-540-85859-1
eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)