Helmut Neugebauer

Johannes Kepler University of Linz

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Niyazi Serdar Sariçiftçi

Johannes Kepler University of Linz

149

A. Neckel

Faculdade Meridional

Antonio Cravino

Institut des Sciences et Technologies Moléculaires d'Angers

Christoph J. Brabec

Friedrich-Alexander-Universität Erlangen-Nürnberg

S. Luzzati

National Research Council

Christoph Winder

University of Sheffield

M. Catellani

Institute for Macromolecular Studies

Markus C. Scharber

Johannes Kepler University of Linz

H. Kuzmany

University of Vienna

Serap Güneş

Yıldız Technical University

Cooperative Institutions

Johannes Kepler University of Linz

120

University of Vienna

Hasselt University

Centre National de la Recherche Scientifique

Universidad Autónoma de Madrid

Friedrich-Alexander-Universität Erlangen-Nürnberg

University of Groningen

Eindhoven University of Technology

IMEC

University of California, Santa Barbara

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In Situ Attenuated Total Reflection FTIR Spectroelectrochemistry Of Polybenzimidazobenzophenanthroline (BBL)

MRS Proceedings (1999)

Teketel Yohannes Helmut Neugebauer Niyazi Serdar Sariçiftçi S. Yi Samson A. Jenekhe

Attenuated total reflection

Reflection

10.1557/proc-598-bb3.75

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Citations (0)

Nanoporous CuInS 2 electrodes for hybrid solar cells

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE (2006)

Serap Güneş Helmut Neugebauer Elif Arici Bogner Niyazi Serdar Sariçiftçi

In this contribution, we present a new hybrid solar cell design. CuInS₂ nanoparticles were synthesized using a low temperature colloidal route with organic surfactants to form an inorganic nanoporous hole transporting electrode. A soluble fullerene derivate PCBM (1-(3-methoxycarbonyl)-propyl-1-1-phenyl-(6,6) C₆₁) was used for electron transport. We investigated the photovoltaic performance of the cells consisting of these CuInS₂ and PCBM bilayers with and without a surface-adsorbed RuL₂(NCS)/TBA(2:2) dye complex(where L= 2,2'-bipyridyl-4,4'-dicarboxylic acid; TBA= tetrabutylammonium). The cells containing the dye showed an improved photovoltaic response.

Nanoporous

Hybrid solar cell

10.1117/12.662978

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Citations (3)

In situ Spectroelectrochemistry Via Infrared Techniques

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE (1985)

R. Kellner Helmut Neugebauer Gerhard Nauer A. Neckel

Spectroscopic studies of electrode processes at molecular level are necessary both for a more detailed understanding of the fundamental electrochemical reactions involved and for the development of better electrode materials. Such investigations require molecular-specific, non destructive surface analytical techniques capable of analyzing solid-liquid interfaces in situ, without changing the structure of the often unstable reaction products during the measurements. It has been demonstrated previously that IR-spectroscopy fulfills these requirements. Recently, the development of FTIR-spectrometry provides the sensitivity and speed necessary to study also shortliving intermediates generated in a spectroelectrochemical cell during potentiodynamic measurements. This paper deals with the advantages and limi-tations of the different IR-spectroscopic reflection techniques developed and applied since 1980 for the in situ study of metal and organic polymer electrodes in contact with aaueous and non aqueous electrolytes (external reflection techniques, internal reflection technique) . Special emphasis is placed on recent combined electrochemical and FTIR-ATR-spectroscopic investigations on polythiophene, poly-3-methylthiophene and polybithiophene.

Polythiophene

Reflection

Attenuated total reflection

10.1117/12.970710

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Citations (8)

Conjugated Polymer-Based Organic Solar Cells

Chemical Reviews (2007)

Serap Güneş Helmut Neugebauer Niyazi Serdar Sariçiftçi

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTConjugated Polymer-Based Organic Solar CellsSerap Günes, Helmut Neugebauer, and Niyazi Serdar SariciftciView Author Information Linz Institute of Organic Solar Cells (LIOS), Physical Chemistry, Johannes Kepler University of Linz, Austria Cite this: Chem. Rev. 2007, 107, 4, 1324–1338Publication Date (Web):April 11, 2007Publication History Received17 September 2006Published online11 April 2007Published inissue 1 April 2007https://pubs.acs.org/doi/10.1021/cr050149zhttps://doi.org/10.1021/cr050149zresearch-articleACS PublicationsCopyright © 2007 American Chemical SocietyRequest reuse permissionsArticle Views66227Altmetric-Citations5692LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose SUBJECTS:Carrier dynamics,Electrical conductivity,Electrodes,Mobility,Solar cells Get e-Alerts

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10.1021/cr050149z

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Citations (6,133)

Fullerenes as functional moieties in conjugated polymers: Towards donor-acceptor double cable polymeric materials

AIP conference proceedings (2001)

Helmut Neugebauer

The properties of a novel poly(bithiophene-fulleropyrrolidine), which belongs to the class of so called “double cable” polymers, are studied. The polymer consists of covalently linked electron acceptor moieties to an electron donor polymeric backbone. Photoinduced charge transfer is studied by photoinduced absorption spectroscopy and by light induced ESR spectroscopy.

Acceptor

Electron acceptor

Photoinduced electron transfer

10.1063/1.1426921

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Comparative Studies of the Internal Electric Field Probed by Electroabsorption Spectroscopy in Organic Semiconductor Devices

Meeting abstracts/Meeting abstracts (Electrochemical Society. CD-ROM) (2006)

Christoph Lungenschmied Christoph Winder Markus C. Scharber Attila J. Mozer Gebhard J. Matt

Abstract not Available.

Organic semiconductor

10.1149/ma2005-01/44/1692

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Immobilized Poly(anthraquinones) for Electrochemical Energy Storage Applications: Structure‐Property Relations

ChemElectroChem (2021)

Dominik Wielend Yolanda Salinas Felix Mayr Matthias Bechmann Cigdem Yumusak

Abstract The majority of energy storage devices like batteries, fuel cells or electrolyzers require heterogeneous electrodes. Immobilization of redox‐active organic molecules by a polymeric approach seems to be a promising route towards organic electrodes for electrocatalytic energy storage or in batteries. Although numerous reports on synthesis and application of new poly‐anthraquinones exist, a universal guideline or tool for selection of the best polymer, concerning several energy storage applications, is still underdeveloped. Moving into the direction of developing such a tool, we have selected and synthesized three poly(anthraquinones). NMR, FTIR, UV‐Vis, TGA, contact angle measurement and SEM revealed certain structure‐property trends, which can be correlated with the performance in the electrochemical investigation. The insights gained within this work demonstrate correlations between the FTIR frequencies and the electrochemical reduction potential, as well as between the polymer hydrophobicity and the electrochemical performance.

Anthraquinones

Electrochemical energy conversion

10.1002/celc.202101315

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Citations (8)

Interfacial Effects in Organic Thin-Film Transistors

Frontiers in Optics (2006)

Thokchom Birendra Singh Pinar Senkarabacack Philipp Stadler Helmut Neugebauer Niyazi Serdar Sariçiftçi

The morphology and molecular organisation of the semiconductor layer at the interface between organic semiconductor and dielectric material of organic field-effect transistors (OFETs) is a crucial factor in achieving good device performance. It is well known that charge transport in these devices occurs near to the interface with the gate dielectric. Charge induced polarization states at this interface create a hysteresis at the transfer characteristics of the OFETs displaying two different source-drain current states by the forward and backword sweeping of the gate voltage. It is not clear what kind of charged states are induced at this critical interface. We employed attenuated total reflection Fourier transform infrared spectroscopy (ATR FTIR) as well as dielectric spectroscopy to investigate this interface. The results show that the chemical structure of materials and their interface nanomorphology determine the properties like hystheresis and ambipolar transport.

Ambipolar diffusion

Organic semiconductor

Hysteresis

Attenuated total reflection

Organic field-effect transistor

10.1364/ope.2006.opwc2

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In Situ FTIR Spectroscopy of Polyaniline Degradation

Springer series in solid-state sciences (1989)

Helmut Neugebauer Niyazi Serdar Sariçiftçi H. Kuzmany A. Necked

Degradation

10.1007/978-3-642-83833-0_59

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Citations (2)

In situ FTIR spectroelectrochemical characterization of n- and p-dopable phenyl-substituted polythiophenes

Physical Chemistry Chemical Physics (2009)

Teketel Yohannes Sandro Lattante Helmut Neugebauer Niyazi Serdar Sariçiftçi Mats R. Andersson

In situ attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroelectrochemistry during oxidation (p-doping) and reduction (n-doping) of three phenyl-substituted polythiophenes, namely POPT, PEOPT and POMeOPT is presented. All the three phenyl substituted polythiophenes show both n- and p-doping. The infrared active vibration (IRAV) patterns obtained during electrochemical oxidation (p-doping) and reduction (n-doping) are compared. HOMO and LUMO energy levels are estimated from cyclic voltammetric experiments and from IRAV patterns during oxidation and reduction. A comparison shows that the standard graphical procedure to determine the onset of oxidation and reduction peaks in the cyclic voltammogram can be improved using in situ spectroscopy.

Attenuated total reflection

10.1039/b905499p

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Citations (6)