Ausra Matoliukstyte

Glass-Forming Hole-Transporting Triphenylamine-Based Hydrazones with Reactive Functional Groups

Synthesis and the properties of a series of triphenylamine-based hydrazones are reported. The dependence of their thermal and glass-forming properties on their chemical structure is discussed. The ionization potentials of the synthesized hydrazones measured by the electron photoemission technique range from 5.16 to 5.32 eV. Hole-drift mobilities of some derivatives molecularly dispersed in bisphenol Z polycarbonate exceed 10−4 cm2V−1s−1 at high electric fields (106 V/cm),at room temperature.

P-152: Efficient Blue Phosphorescent OLEDs Employing Novel Oligocarbazoles as High-Triplet-Energy Host Materials

A series of 3(6),9′-linked oligocarbazoles with large triplet energies and morphological stability are reported as host materials for electrophosphorescence. In such oligocarbazoles, the triplet excitation is confined within one carbazole unit, leading to a new molecular design strategy for large-triplet-energy and high morphological stability hosts. Using these hosts, efficient blue phosphorescent OLEDs having efficiencies up to 15%, 31 cd/A and 28 lm/W are demonstrated.

9-(4-Methoxyphenyl) Carbazolyl-Containing Hydrazones for Optoelectronic Applications

ABSTRACT 9-(4-methoxyphenyl)carbazolyl-containing hydrazones were prepared by multi-step synthetic route including Ullmann coupling of carbazole with 4-iodoanisole, formylation of 9-(4-methoxyphenyl)carbazole by Vilsmeier reaction and the condensation of mono- or dicarbaldehydes obtainexd with differently substituted hydrazines. All the hydrazones synthesized form glasses with the glass transition temperatures ranging from 56 to 110°C. Their ionization potentials established by electron photoemission technique are in the range 5.3–5.47 eV. Hole drift mobilities of 50% solid solutions of the hydrazones in polycarbonate established by the xerographic time-of-flight technique exceed 10−5 cm2/Vs at high electric fields.

Condensed Aromatic Amines as Electroactive Materials for Optoelectronic Applications

The synthesis and properties of a series of new glass-forming condensed aromatic amines are reported. The dependence of their thermal and optical propertiess on their chemical structure is discussed. The ionization potentials of the synthesized aromatic amines measured by the electron photoemission technique are 5.30–5.40 eV. Hole drift mobilities of some derivatives molecularly dispersed in bisphenol Z polycarbonate exceed 10−6 cm2 V−1 s−1 at high electric fields (106 V cm−1), at room temperature.