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[3,3′]Bicarbazolyl-based enamines as hole-transporting materials

R. PASPIRGELYTE1, V. VAITKEVICIENE1,2, S. GRIGALEVICIUS1, J. V. GRAZULEVICIUS1,* , V. JANKAUSKAS3, V. LINONIS4

Affiliation

  1. Department of Organic Technology, Kaunas University of Technology, Radvilenu plentas 19, LT50254, Kaunas, Lithuania
  2. Lithuanian Energy Institute, 3 Breslaujos str., LT-44403, Kaunas, Lithuania
  3. Department of Solid State Electronics, Vilnius University, Sauletekio aleja 9, LT10222, Vilnius, Lithuania
  4. Physical Education and Sports Center, Kaunas University of Technology, A. Pureno 18, Kaunas, Lithuania

Abstract

[3,3′]Bicarbazolyl - based enamines have been synthesized by the multi-step synthetic rout. Full characterization of their structure by nuclear magnetic resonance and mass spectrometry as well as by infrared spectroscopy is presented. The synthesized materials were examined by various techniques including differential scanning calorimetry, ultraviolet and photoluminescent spectrometry, electron photoemission spectrometry and time of flight techniques. Electron photoemission spectra of the amorphous layers of the synthesized enamines revealed the ionization potentials of ca. 5.5 eV. Time-of-flight hole drift mobilities in the layers of bisphenol Z polycarbonate molecularly doped with 33 - 50 wt. % of [3,3′]-bicarbazolyl-based enamines ranged from 10-5 to 10-4 cm2/Vs at high electric fields..

Keywords

Bicarbazolyl, Enamine, Molecular glass, Ionization potential, Hole drift mobility.

Submitted at: Feb. 20, 2008
Accepted at: Oct. 7, 2008

Citation

R. PASPIRGELYTE, V. VAITKEVICIENE, S. GRIGALEVICIUS, J. V. GRAZULEVICIUS, V. JANKAUSKAS, V. LINONIS, [3,3′]Bicarbazolyl-based enamines as hole-transporting materials, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 10, pp. 2782-2786 (2008)