Optical properties and electrical transport of thin films of terbium(III) bis(phthalocyanine) on cobalt

• Peter Robaschik,
• Pablo F. Siles,
• Daniel Bülz,
• Peter Richter,
• Manuel Monecke,
• Michael Fronk,
• Svetlana Klyatskaya,
• Daniel Grimm,
• Oliver G. Schmidt,
• Mario Ruben,
• Dietrich R. T. Zahn and
• Georgeta Salvan

Beilstein J. Nanotechnol. 2014, 5, 2070–2078, doi:10.3762/bjnano.5.215

• the Q and B band, of phthalocyanines are highlighted in Figure 2. They correspond to ligand-related π–π* transitions [15]. For organic semiconductors we can consider the relative magnetic permeability to be µr ≈ 1. Thus, we can easily determine the optical constants from the diagonal elements εii of

CoPc and CoPcF₁₆ on gold: Site-specific charge-transfer processes

• Fotini Petraki,
• Heiko Peisert,
• Johannes Uihlein,
• Umut Aygül and
• Thomas Chassé

Beilstein J. Nanotechnol. 2014, 5, 524–531, doi:10.3762/bjnano.5.61

• allow the discussion of site-specific charge-transfer processes. Keywords: Auger parameter; charge transfer; interfaces; organic semiconductors; photoemission; phthalocyanines; polarization screening; Introduction In order to develop and improve the performance of organic-based electronic devices an

High-resolution electrical and chemical characterization of nm-scale organic and inorganic devices

• Pierre Eyben

Beilstein J. Nanotechnol. 2013, 4, 318–319, doi:10.3762/bjnano.4.35

• emergence of electronic components based on organic semiconductors. The organic materials used nowadays are typically made of single molecules in highly ordered assemblies or of polymeric semiconductors in thin films. In recent years, an extensive set of organic-based prototypes (transistors, sensors

Influence of diffusion on space-charge-limited current measurements in organic semiconductors

• Thomas Kirchartz

Beilstein J. Nanotechnol. 2013, 4, 180–188, doi:10.3762/bjnano.4.18

• reasonably accurate mobility values. Keywords: current–voltage curves; electron-only device; drift–diffusion; mobility; simulation; traps; Introduction A frequently used method to analyze charge carrier transport in organic semiconductors is based on space-charge-limited current measurements performed on

• Mott–Gurney law [18][19] Here ε0 is the vacuum permittivity and εr is the relative permittivity. The Mott–Gurney law is frequently used to determine the mobility of organic semiconductors used for light emitting diodes and solar cells. However, its derivation uses three assumptions that are often not

• applicable in organic semiconductors, namely that the device is trap-free, that diffusion is negligible and that the electric field at the injecting contact is zero. All three assumptions are in general not correct, in particular the assumption that there are no charged defects in organic semiconductors [20

STM study on the self-assembly of oligothiophene-based organic semiconductors

• Elena Mena-Osteritz,
• Marta Urdanpilleta,
• Erwaa El-Hosseiny,
• Berndt Koslowski,
• Paul Ziemann and
• Peter Bäuerle

Beilstein J. Nanotechnol. 2011, 2, 802–808, doi:10.3762/bjnano.2.88

• transport properties in the solid state, which allow their application in a variety of organic-electronic devices [1]. Among others, organic semiconductors based on thiophenes are very promising materials in the field, because of their superior stability and the possibility to chemically functionalize them

• -molecule organic devices have restored huge interest in structurally well-defined and therefore monodisperse, crystalline oligomers [8]. The method of choice to investigate the ordering of organic semiconductors adsorbed on flat metallic surfaces, at the desired molecular level in the subnanometer range

Optical properties of fully conjugated cyclo[n]thiophenes – An experimental and theoretical approach

• Elena Mena-Osteritz,
• Fan Zhang,
• Günther Götz,
• Peter Reineker and
• Peter Bäuerle

Beilstein J. Nanotechnol. 2011, 2, 720–726, doi:10.3762/bjnano.2.78

• organic field-effect transistors, organic solar cells, and sensors [1][2][3][4]. Typically, such π-conjugated systems comprise extended linear one-dimensional (1D) structures showing interesting optoelectronic properties. In the solid state they represent organic semiconductors, whereas by doping with

• novel class of organic semiconductors without end-effects exhibiting fascinating optical [17][18][19][20] and self-assembling properties [21][22][23]. In a statistical macrocyclization approach under high-dilution conditions, the first cyclic representatives C12T, C16T, and C18T were prepared starting

Terthiophene on Au(111): A scanning tunneling microscopy and spectroscopy study

• Berndt Koslowski,
• Anna Tschetschetkin,
• Norbert Maurer,
• Elena Mena-Osteritz,
• Peter Bäuerle and
• Paul Ziemann

Beilstein J. Nanotechnol. 2011, 2, 561–568, doi:10.3762/bjnano.2.60

• indicating an adsorption-induced dimensionality transition of the involved tunneling processes. Keywords: Au(111); electronic density of states; STM; STS; terthiophene; Introduction Because of their expedient properties and their diversity, oligo- and polythiophenes are among the most investigated organic

• semiconductors. Especially, oligothiophenes are very promising candidates for molecular electronics and have been exploited to form organic field-effect transistors [1][2], optical switches [3], light emitting diodes [4], and solar cells [5][6][7]. To optimize the performance of such devices, the properties of

Self-organizing bioinspired oligothiophene–oligopeptide hybrids

• Alexey K. Shaytan,
• Eva-Kathrin Schillinger,
• Elena Mena-Osteritz,
• Sylvia Schmid,
• Pavel G. Khalatur,
• Peter Bäuerle and
• Alexei R. Khokhlov

Beilstein J. Nanotechnol. 2011, 2, 525–544, doi:10.3762/bjnano.2.57

• -assemble to form nanoscale fibrillar aggregates. The main focus is on the experimental and theoretical results obtained in our group. Review Synthesis of oligothiophene–oligopeptide hybrids The hybrid molecules discussed in this paper are bio-functionalized organic semiconductors. They represent either di