Synthesis and Properties of Novel Derivatives of 1,3,5-Tris(diarylamino)benzenes for Electroluminescent Devices

Abstract

Amorphous molecular materials that form stable glasses with high transition temperatures have many applications, including hole‐transport materials in light‐emitting devices. The synthesis of some novel derivatives of 1,3,5‐tris(diarylamino)benzenes, TDABs, with different aryl substituents is reported. The absorption, fluorescence, electrochemical behavior, and thermal properties of these compounds are described and their suitability as hole‐transport and emitting materials in light‐emitting devices demonstrated.

Luminescent acetylthiol derivative tripodal osmium(II) and iridium(III) complexes: Spectroscopy in solution and on surfaces

“…The values for the HOMO-LUMO gap are also reported in the Table 3, and are estimated as the difference between the standard potential for the first oxidation and the first reduction respectively. Also, the values of HOMO and LUMO are calculated based on the value of -4.8 eV for ferrocene with respect to vacuum level as previously reported [70]. Furthermore, concerning the oxidation process, the value for the standard potential of the species free to diffuse in solution is matching, within the experimental error, that of the species directly bound to the electrode surface through the SAMs (see next section).…”

Star-burst 1H-pyrazolo[3,4-b]quinoline as chromophore for light-emitting diodes and photovoltaic devices

“…Amine 1 was prepared from phloroglucine, aniline hydrochloride by heating at 190 °C in aniline according to literature procedure [9] .…”

Bi- or ter-pyridine tris-substituted benzenes as electron-transporting materials for organic light-emitting devices

“…HOMO energy was determined with a photoelectron 6 emission yield spectrometer (Riken Keiki AC-3), and the HOMO energy was defined as being equal to the ionization potential measured by photoelectron emission spectroscopy. Optical band gaps were determined by the spectral onset of each UV-visible absorption spectrum; the lowest unoccupied molecular orbital (LUMO) energy was then estimated to be the difference between the HOMO energy and the optical bandgap.…”

“…[1,2] In the last decade, many kinds of amorphous molecular semiconductor materials, [3,4] HT materials, [5][6][7][8][9][10][11][12] and ET materials, [13][14][15][16][17][18][19][20][21][22][23] have been proposed. Among these, HT molecular semiconducting materials have become practical due to their high charge-carrier mobility and excellent operational durability, but few reports exist to date on ET organic semiconducting amorphous materials that perform well in terms of high-speed transport of electrons, easy injection of electrons from the cathode, and good operational durability.…”