Synthesis, characterization, and use as emissive layer of white organic light emitting diodes of the highly isotactic poly(N-pentenyl-carbazole)

The synthesis and the microstructural characterization of isotactic poly (N-pentenyl-carbazole) (i-PPK) are reported. The achieved polymer is semicrystalline, the melting temperature is 138 degrees C. i-PPK Fourier transform infrared spectroscopy (FTIR) spectrum and X-ray diffraction pattern are compared with those of polyvinylcarbazole. The observed differences are tentatively associated to higher flexibility of the i-PPK chains due to the alkylene group connecting the carbazole group to the main chain. The presence of intrachain and interchain interactions between carbazole units, which bring these groups to stack each other, is assumed. i-PPK optical properties are investigated and an electroluminescent behaviour of polymer is observed. Organic light emitting diodes based on i-PPK layers are founded to emit white light. POLYM. COMPOS., 36:1110-1117, 2015. (c) 2015 Society of Plastics Engineers