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1,3-Bisdiphenylethenyl-substituted Carbazolyl Derivatives as Charge Transporting Materials
Faculty of Chemical Technology, Kaunas University of Technology, Radvilenu pl. 19, Kaunas LT-50254, Lithuania
Department of Solid State Electronics, Vilnius University, Sauletekio 9-III, Vilnius LT-10222, Lithuania
* Author to whom correspondence should be addressed.
Received: 19 November 2012; in revised form: 9 December 2012 / Accepted: 11 December 2012 / Published: 13 December 2012
Abstract: Synthesis of 1,3-diphenylethenylcarbazolyl-based charge transporting materials involving electron donating hydrazone moieties and an electron withdrawing 1,3-indandione moiety is reported. The obtained materials were examined by various techniques, including differential scanning calorimetry, UV-Vis spectroscopy, xerographic time of flight technique and the electron photoemission in air method. Photoemission spectra of the amorphous films of the investigated compounds showed ionization potentials of 5.54–5.90 eV. The hole drift mobility was measured by the xerographic time of flight technique. The highest hole drift mobility, exceeding 10−5 cm2/V·s at 6.4 × 105 V/cm electric field, was observed for the 1,3-diphenylethenylcarbazolyl derivative molecularly doped with a N,N-diphenylhydrazone moiety in the polymeric host bisphenol-Z polycarbonate (PC-Z).
Keywords: carbazole; hydrazone; 1,3-indandione; ionization potential; charge carrier mobility
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Bubniene, G.; Daskeviciene, M.; Pukalskas, A.; Jankauskas, V.; Getautis, V. 1,3-Bisdiphenylethenyl-substituted Carbazolyl Derivatives as Charge Transporting Materials. Molecules 2012, 17, 14846-14857.
Bubniene G, Daskeviciene M, Pukalskas A, Jankauskas V, Getautis V. 1,3-Bisdiphenylethenyl-substituted Carbazolyl Derivatives as Charge Transporting Materials. Molecules. 2012; 17(12):14846-14857.
Bubniene, Giedre; Daskeviciene, Maryte; Pukalskas, Audrius; Jankauskas, Vygintas; Getautis, Vytautas. 2012. "1,3-Bisdiphenylethenyl-substituted Carbazolyl Derivatives as Charge Transporting Materials." Molecules 17, no. 12: 14846-14857.