Intramolecular charge transfer in bipolar molecules for electron and hole transporting materials

Abstract

The excited state relaxation of 6-(9H-carbazole)hexyl-9,10,10-trioxo-9H-3-thioxanthenecarboxyl (CHTT) molecules containing electron donating and electron accepting groups was investigated in solutions by means of picosecond pump–probe absorption spectroscopy. The excitation energy and charge transfer between electrondonating and electronaccepting molecule fragments takes place under molecular excitation and determine the excited state relaxation dynamics.