Synthesis, Photophysics and Optoelectronic Devices based on Carbazole Derivatives and Iridium Complexes

N-hexylcarbazole with different side groups like pyrenyl (P2NHC), 4-cyanophenyl (CNHC) and 4-acetophenyl (ANHC) in 3,6 positions were investigated as candidates for blue emitters and UV-photdetectors. We explored the electroluminescence and photocurrent generation mechanisms in carbazole derivatives by making devices with different architectures. We demonstrate an integrated OLED-cum-Photodetector device using P2NHC. For this device, the maximum brightness in forward bias is 16000 cd/m2 and maximum photoresponse in reverse bias is 77 mA/W at 390 nm. Such a dual function device is first of its kind. We have studied in detail the proximity doping and electronic transport in hole doped pyrenyl derivative. New heteroleptic Iridium complexes were synthesized and investigated for phosphorescent red-emitting LED