Online citations, reference lists, and bibliographies.
← Back to Search

Uncovering The (un-)occupied Electronic Structure Of A Buried Hybrid Interface.

S. Vempati, J-C Deinert, L. Gierster, L. Bogner, C. Richter, N. Mutz, S. Blumstengel, A. Zykov, S. Kowarik, Y. Garmshausen, J. Hildebrandt, S. Hecht, J. Stähler
Published 2019 · Materials Science, Physics, Medicine

Cite This
Download PDF
Analyze on Scholarcy
The energy level alignment at organic/inorganic (o/i) semiconductor interfaces is crucial for any light-emitting or -harvesting functionality. Essential is the access to both occupied and unoccupied electronic states directly at the interface, which is often deeply buried underneath thick organic films and challenging to characterize. We use several complementary experimental techniques to determine the electronic structure of p -quinquephenyl pyridine (5P-Py) adsorbed on ZnO(1 0   -1 0). The parent anchoring group, pyridine, significantly lowers the work function by up to 2.9 eV and causes an occupied in-gap state (IGS) directly below the Fermi level E F. Adsorption of upright-standing 5P-Py also leads to a strong work function reduction of up to 2.1 eV and to a similar IGS. The latter is then used as an initial state for the transient population of three normally unoccupied molecular levels through optical excitation and, due to its localization right at the o/i interface, provides interfacial sensitivity, even for thick 5P-Py films. We observe two final states above the vacuum level and one bound state at around 2 eV above E F, which we attribute to the 5P-Py LUMO. By the separate study of anchoring group and organic dye combined with the exploitation of the occupied IGS for selective interfacial photoexcitation, this work provides a new pathway for characterizing the electronic structure at buried o/i interfaces.
This paper references
Theory of two-photon photoemission spectroscopy of surfaces
H. Ueba (2007)
Organic - Inorganic Hybrid Solar Cells: A Comparative Review
M. Wright (2012)
Atomic-Scale Perspective of Ultrafast Charge Transfer at a Dye-Semiconductor Interface.
K. Siefermann (2014)
Ultrafast Interfacial Proton-Coupled Electron Transfer
B. Li (2006)
Influence of the electron-cation interaction on electron mobility in dye-sensitized ZnO and TiO2 nanocrystals: a study using ultrafast terahertz spectroscopy.
H. Němec (2010)
Ultrafast dynamics in solids probed by femtosecond time-resolved broadband electronic sum frequency generation
L. Foglia (2016)
Local aspects of hydrogen-induced metallization of the ZnO(101¯0) surface
J. Deinert (2015)
Electron injection dynamics in dye-sensitized semiconductor nanocrystalline films
A. Furube (2014)
Determination of the Electronic Energetics of CdTe Nanoparticle Assemblies on Au Electrodes by Photoemission, Electrochemical, and Photocurrent Studies
Y. Wang (2012)
Observation of an Ultrafast Exciton Hopping Channel in Organic Semiconducting Crystals
T. Wang (2016)
Crystal Structures, Phase Transitions and Energy Calculations of Poly(p-phenylene) Oligomers
K. N. Baker (1993)
Breakdown of the mirror image symmetry in the optical absorption/emission spectra of oligo(para-phenylene)s.
G. Heimel (2005)
Free and trapped hybrid charge transfer excitons at a ZnO/small-molecule heterojunction
A. Panda (2016)
Dynamics at solid state surfaces and interfaces
U. Bovensiepen (2010)
Formation of metal–organic interface states studied with 2PPE
Manuel Marks (2014)
Efficient light emission from inorganic and organic semiconductor hybrid structures by energy-level tuning
R. Schlesinger (2015)
Effect of Anchoring Group on Electron Injection and Recombination Dynamics in Organic Dye-Sensitized Solar Cells
J. Wiberg (2009)
Rates of unimolecular pyridine ion decay and the heat of formation of C4H4
J. Eland (1978)
Inside Back Cover (Phys. Status Solidi B 6/2010)
C. Klingshirn (2010)
Five-wave-mixing spectroscopy of ultrafast electron dynamics at a si(001) surface.
C. Voelkmann (2004)
Temporary negative ions and electron affinities of benzene and N‐heterocyclic molecules: pyridine, pyridazine, pyrimidine, pyrazine, and s‐triazine
I. Nenner (1975)
Transient photoluminescence ofpara-hexaphenyl layers
E. Faulques (2002)
Electronic structure at the perylene-tetracarboxylic acid dianhydride/Ag(111) interface studied with two-photon photoelectron spectroscopy.
S. Sachs (2009)
Revealing the Origin of Fast Electron Transfer in TiO2-Based Dye-Sensitized Solar Cells.
H. Wei (2016)
Structural studies of parasexiphenyl thin films: Importance of the deposition parameters
L. Athouël (1996)
Band-offset engineering in organic/inorganic semiconductor hybrid structures.
S. Blumstengel (2010)
Vacuum-processable ladder-type oligophenylenes for organic–inorganic hybrid structures: synthesis, optical and electrochemical properties upon increasing planarization as well as thin film growth
B. Kobin (2012)
Ultrafast electron transfer dynamics at NH3/Cu(111) interfaces: determination of the transient tunneling barrier.
J. Stähler (2008)
Controlling the work function of ZnO and the energy-level alignment at the interface to organic semiconductors with a molecular electron acceptor
Raphael Schlesinger (2013)
Zinc oxide based dye-sensitized solar cells: A review
R. Vittal (2017)
Electronic structure and dynamics of quasi-2D states of vanadyl naphthalocyanine on Au(111)†
N. Ilyas (2013)
Probing Electronic Structures of Organic Semiconductors at Buried Interfaces by Electronic Sum Frequency Generation Spectroscopy
Y. Li (2015)
Weinheim: Wiley-VCH) 2 115 20 Marks M, Schöll A and Höfer
M Wolf (2013)
Dynamics at Solid State Surfaces and Interfaces, Vol. 2: Fundamentals
U. Bovensiepen (2012)
Optically Induced Inter- and Intrafacial Electron Transfer Probed by Two-Photon Photoemission: Electronic States of Sexithiophene on Au(111)
E. Varene (2011)
Universal energy-level alignment of molecules on metal oxides.
Mark T. Greiner (2011)
Defect-driven interfacial electronic structures at an organic/metal-oxide semiconductor heterojunction.
Paul Winget (2014)
Surface States and Adsorbate‐Induced Electronic Structure
T. Fauster (2012)
How isolated are the electronic states of the core in core/shell nanoparticles?
Z. Xie (2011)
Chain-length dependence of electronic and electrochemical properties of conjugated systems: polyacetylene, polyphenylene, polythiophene, and polypyrrole
J. Bredas (1983)
Hybrid resonant organic-inorganic nanostructures for optoelectronic applications.
V. Agranovich (2011)
The electronic structure of methanol covered TiO2(110) surfaces
K. Onda (2005)
Microwave Spectrum and Dipole Moment of Pyridine
Billy B. DeMore (1954)
Electronic structure and electron dynamics at molecule?metal interfaces: implications for molecule-based electronics
X. Zhu (2004)
65 years of ZnO research – old and very recent results
C. Klingshirn (2010)
Electronic and Optical Excitations at the Pyridine/ZnO(101¯0) Hybrid Interface
O. Turkina (2019)
Delayed Electron Transfer through Interface States in Hybrid ZnO/Organic-Dye Nanostructures
C. Strothkaemper (2013)
Thin Solid Films
M. Ferenets (2010)
Angle-resolved photoelectron spectroscopy study of the anion-derived dangling-bond band on ZnO(101̄0)
K. Ozawa (2003)
Metallization of ZnO(101̄0) by adsorption of hydrogen, methanol, and water: Angle-resolved photoelectron spectroscopy
K. Ozawa (2010)
Charge transfer excitons at ZnMgO/P3HT heterojunctions: Relation to photovoltaic performance
M. Eyer (2015)
Ultrafast interfacial electron transfer from the excited state of anchored molecules into a semiconductor
L. Gundlach (2007)
Large work function reduction by adsorption of a molecule with a negative electron affinity: pyridine on ZnO(1010).
O. Hofmann (2013)

This paper is referenced by
Semantic Scholar Logo Some data provided by SemanticScholar