The electronic structure of C60/ZnPc interface for organic photovoltaic device with blended layer architecture

Park, S. H.; Jeong, J. G.; Hyo-Jin Kim; Park, Seung-Han; Mann-Ho Cho; Sang Wan Cho; Yeonjin Yi; Min Young Heo; Hyunchul Sohn
January 2010
Applied Physics Letters;1/4/2010, Vol. 96 Issue 1, p013302
Academic Journal
The interfacial electronic structures of fullerene (C60)/zinc-phthalocyanine (ZnPc) and C60/ZnPc:C60 (50 wt %) containing a blended layer were investigated by in situ ultraviolet photoelectron spectroscopy (UPS), in an attempt to understand the role of the blended layer in improving the performance of organic photovoltaic devices that contain such layers. From the UPS spectra, the band bending found to be 0.30 eV in the ZnPc layer and 0.43 eV in the C60 layer at the C60/ZnPc interface. On the other hand, the band bending was 0.25 eV in both of the organic layers at the ZnPc:C60/ZnPc interface and no significant band bending in the C60 layer at the C60/ZnPc:C60 interface was found. The observed interface dipole was 0.06 eV at the C60/ZnPc interface and 0.26 eV at the ZnPc:C60/ZnPc interface. The offset between the highest unoccupied molecular orbital of ZnPc and the lowest occupied molecular orbital of C60 was 0.75 eV at C60/ZnPc and was 1.04 eV at the ZnPc:C60/ZnPc interface. The increased offset can be attributed to an increase in the interface dipole, caused by the blending donor and acceptor material. The blending facilitates charge transfer between the donor and acceptor, resulting in an increase in the interface dipole, resulting in a larger offset.


Related Articles

  • Investigation of the processes of charge transfer and charge accumulation in As2Se3 amorphous layers prepared by different methods. R. Castro; V. Bordovsky; G. Grabko // Glass Physics & Chemistry;Feb2009, Vol. 35 Issue 1, p43 

    Abstract  The influence of the method used for preparing As2Se3 amorphous layers on the processes of charge transfer and charge accumulation in these structures is studied. Different physical parameters, such as the contact capacitance, the width of the charge accumulation region, and the...

  • Extrinsic Fluorescent Dyes as Tools for Protein Characterization. Andrea Hawe; Wim Jiskoot // Pharmaceutical Research;Jul2008, Vol. 25 Issue 7, p1487 

    Abstract  Noncovalent, extrinsic fluorescent dyes are applied in various fields of protein analysis, e.g. to characterize folding intermediates, measure surface hydrophobicity, and detect aggregation or fibrillation. The main underlying mechanisms, which explain the fluorescence properties...

  • Electrical characterization of inorganic-organic hybrid photovoltaic devices based on silicon-poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate). Zhang, Jie; Zhang, Yunfang; Zhang, Fute; Sun, Baoquan // Applied Physics Letters;1/7/2013, Vol. 102 Issue 1, p013501 

    Hybrid organic-inorganic photovoltaic devices based on nanostructured silicon and poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) hybrid devices present excellent light harvesting capabilities as well as a simple fabrication process. Unlike the metal/Si junction, PEDOT:PSS...

  • Vibrational Normal Modes Contributions to the Vibrational First Hyperpolarizability in a Sample of TICT Molecules. Saal, Amar; Ben Ali, Mahfoud Hadj; Ouamerali, Ourida // AIP Conference Proceedings;12/26/2007, Vol. 963 Issue 2, p110 

    The vibrational normal modes contributions to the total vibrational first hyperpolarizability have been evaluated at the HF/6-31G level for a set of twist intramolecular charge transfer (TICT) molecules. From this study we tried to obtain a relationship between the vibrational contribution of a...

  • Interaction of magic gold cluster with Si60 cage. Sun, Q.; Wang, Q.; Kawazoe, Y.; Jena, P. // European Physical Journal D -- Atoms, Molecules, Clusters & Opti;May2004, Vol. 29 Issue 2, p231 

    First-principles studies are performed on Au12W@Si60 by using projector-augmented wave (PAW) method and generalized gradient approximation for the exchange-correlation energy. The geometry, electronic structure, orbital hybridization, and charge transfer are discussed. It is found that the magic...

  • Simulation of environment effects on retroreflectors in ITER. Voitsenya, V. S.; Donné, A. J. H.; Bardamid, A. F.; Belyaeva, A. I.; Berezhnyj, V. L.; Galuza, A. A.; Gil, Ch.; Konovalov, V. G.; Lipa, M.; Malaquais, A.; Naidenkova, D. I.; Ryzhkov, V. I.; Schunke, B.; Solodovchenko, S. I.; Topkov, A. N. // Review of Scientific Instruments;Aug2005, Vol. 76 Issue 8, p083502 

    Two plasma diagnostics in ITER will use cube-corner reflectors (CCR): poloidal polarimetry and toroidal interferometry/polarimetry. The multichannel poloidal polarimetry system is planned to operate at a wavelength of 118.8 μm. The multichannel toroidal interferometry/polarimetry system is...

  • Origin and control of superlinear polarizability scaling in chemical potential equalization methods. Warren, G. Lee; Davis, Joseph E.; Patel, Sandeep // Journal of Chemical Physics;4/14/2008, Vol. 128 Issue 14, p144110 

    Many common chemical potential equalization (μEq) methods are known to suffer from a superlinear scaling of the polarizability with increasing molecular size that interferes with model transferability and prevents the straightforward application of these methods to large, biochemically...

  • Charge transfer in the Cl-CO cluster induced by core ionization. Kryzhevoi, Nikolai V.; Dobrodey, Nickolay V.; Cederbaum, Lorenz S. // Journal of Chemical Physics;3/8/2005, Vol. 122 Issue 10, p104304 

    Ab initio calculations of core-ionization spectra of the anion-molecule Cl-CO cluster are performed. Particular attention is paid to the investigation of charge-transfer screening processes accompanying core ionization of the CO molecule in the cluster. The charge-transfer processes are very...

  • Comparing polarizable force fields to ab initio calculations reveals nonclassical effects in condensed phases. Chelli, Riccardo; Schettino, Vincenzo; Procacci, Piero // Journal of Chemical Physics;6/15/2005, Vol. 122 Issue 23, p234107 

    In a recent work [Giese and York J. Chem. Phys. 120, 9903 (2004)] showed that many-body force field models based solely on pairwise Coulomb screening cannot simultaneously reproduce both gas-phase and condensed-phase polarizability limits. In particular, polarizable force fields applied to...


Read the Article


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

Try another library?
Sign out of this library

Other Topics