Synthesis and properties of glass-forming phenothiazine and carbazole adducts

Charge-transporting and photoluminescent phenothiazine and carbazole adducts were synthesized and their thermal, optical, photophysical and photoelectrical properties were studied. The materials synthesized were found to constitute glasses with glass transition temperatures in the range of 63–78 °C. Their initial weight loss temperatures range from 334 to 362 °C. Steady state and time-resolved fluorescence spectrometry techniques have revealed energy transfer in the adducts of carbazole and phenothiazine and the existence of excimer forming sites in the films of 3-(10-phenothiazinyl)-9-ethylcarbazole and 3-(9-carbazolyl)-9-ethylcarbazole. The electron photoemission spectra of the materials were recorded and the ionization potentials of 5.38–5.87 eV were established. Time-of-flight hole drift mobilities of carbazole twin compound molecularly dispersed in bisphenol Z polycarbonate (1:2 by weight) approach 2 × 10−5 cm2/V s at high electric field.