TITLE

Interdiffusion of molecular acceptors through organic layers to metal substrates mimics doping-related energy level shifts

AUTHOR(S)
Duhm, Steffen; Salzmann, Ingo; Bröker, Benjamin; Glowatzki, Hendrik; Johnson, Robert L.; Koch, Norbert
PUB. DATE
August 2009
SOURCE
Applied Physics Letters;8/31/2009, Vol. 95 Issue 9, p093305
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Photoemission measurements reveal energy level shifts toward the Fermi level when a strong electron acceptor (tetrafluoro-tetracyanoquinodimethane, F4-TCNQ) is deposited on pristine layers of 4,4′,4″-tris(N,N-diphenyl-amino)triphenylamine (TDATA) or 4,4′-bis(N-carbazolyl)biphenyl (CBP). The shifts of the TDATA and CBP energy levels toward the Fermi level of the Au substrate could, in principle, arise from p-type doping of the intrinsic organic layers. While this indeed takes place in TDATA, doping of CBP by F4-TCNQ, i.e., charge transfer complex formation, does not occur. The shifts observed in CBP arise from the diffusion of F4-TCNQ toward the Au substrate, which modifies the buried metal surface potential, leading to a realignment of the energy levels of the organic overlayer.
ACCESSION #
44066560

 

Related Articles

  • Charge transfer at polymer-electrode interfaces: The effect of energetic disorder and thermal injection on band bending and open-circuit voltage. Blakesley, James C.; Greenham, Neil C. // Journal of Applied Physics;Aug2009, Vol. 106 Issue 3, p034507 

    We investigate the band bending that occurs at the interface between a disordered organic semiconductor and a metal electrode. Ultraviolet photoemission spectroscopy measurements of thin organic layers on conducting substrates have revealed band bending within a few nanometers of the interface....

  • Theoretic insights into the Ag doping in monolayer and bilayer ZnO armchair nanoribbons: edge effect and position-dependent properties. Li, Yanlu; Zhao, Xian; Cheng, Xiufeng; Fan, Weiliu // Journal of Nanoparticle Research;Oct2012, Vol. 14 Issue 10, p1 

    One-dimensional nanoribbons, thickness of which is smaller than width, exhibit special confinement and edge effects far from uniform in the cross-section. By means of density functional theory, we investigated the influence of the edges and doping positions on the electronic structure of...

  • An experimental and theoretical study of the doubly charged ion O2+2. Fournier, J.; Fournier, P. G.; Langford, M. L.; Mousselmal, M.; Robbe, J. M.; Gandara, G. // Journal of Chemical Physics;3/1/1992, Vol. 96 Issue 5, p3594 

    The energy levels of triplet states of doubly charge oxygen, obtained using double charge transfer spectroscopy, have been examined in the light of ab initio calculations. Four peaks were found in the double charge transfer spectrum with energies of 41.1±0.2, 43.2±0.2, 48.2±0.3, and...

  • The chemisorption and reaction of diethylsilane on silicon (100) and (111) surfaces. Lapiano-Smith, D. A.; Himpsel, F. J.; Terminello, L. J. // Journal of Applied Physics;11/1/1993, Vol. 74 Issue 9, p5842 

    Presents a study which utilized soft x-ray photoemission to investigate the chemisorption and subsequent reaction of diethylsilane on silicon (111) and (100) surfaces. Degradation of diethylsilane; Results of the valence band photoemission measurements; Details of the silicon 2p and carbon 1s...

  • Applications oriented design of Bi3+ doped phosphors. Wang, Lili; Lv, Zhifan; Kang, Wukui; Shangguan, Xinyang; Shi, Jinsheng; Hao, Zhihui // Applied Physics Letters;4/15/2013, Vol. 102 Issue 15, p151909 

    Based on the relationships between Bi3+ energy levels and environmental factor he in phosphors established before, positions of A band of Bi3+ in ZnWO4 and CdWO4 are predicted to lie in near ultraviolet region. ZnWO4:Bi3+ and CdWO4:Bi3+ were prepared via a precipitation method. By examining...

  • Charge transfer over localized states in a TlS single crystal. Mustafaeva, S. N.; Asadov, M. M.; Ismailov, A. A. // Physics of the Solid State;Nov2008, Vol. 50 Issue 11, p2040 

    It is revealed that TlS single crystals exhibit a variable range hopping conduction along a normal to their natural layers at temperatures T ≤ 230 K in a dc electric field and a nonactivated hopping conduction at low temperatures in strong electric fields. Estimates are made for the...

  • Electronic structure and work function of potassium-doped PTCDA thin films. Fuentes, G. G.; Knupfer, M. // Applied Physics A: Materials Science & Processing;Aug2006, Vol. 84 Issue 3, p329 

    The electronic properties of thin films of potassium-doped 3,4:9,10-perylenetetracarboxylic dianhydride (PTCDA) have been studied using photoemission spectroscopy. Potassium addition results in a charge transfer to PTCDA molecules as signaled by the evolution of the valence band photoemission...

  • Energy level alignment of electrically doped hole transport layers with transparent and conductive indium tin oxide and polymer anodes. Fehse, Karsten; Olthof, Selina; Walzer, Karsten; Leo, Karl; Johnson, Robert L.; Glowatzki, Hendrik; Bröker, Benjamin; Koch, Norbert // Journal of Applied Physics;Oct2007, Vol. 102 Issue 7, p073719 

    Using ultraviolet photoemission spectroscopy, we investigated the energy level alignment at the interfaces of typical anodes used in organic electronics, indium tin oxide (ITO) and poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), with the oligomeric hole transport material...

  • Photoemission spectra of indium selenide. Katerynchuk, V. M.; Kovalyuk, M. Z.; Tovarnitskii, M. V. // Semiconductor Physics, Quantum Electronics & Optoelectronics;2006, Vol. 9 Issue 4, p36 

    For layered InSe crystals photoluminescence spectra were investigated and the corresponding radiative transitions were analyzed. It was found that along with the band- to-band transitions the radiative ones with participation of impurity levels plays a substantial role in the light emission...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics