Highly Photoluminescent Nonconjugated Polymers for Single-Layer Light Emitting Diodes

Page, Z. A., Chiu, C. Y., Narupai, B., Laitar, D. S., Mukhopadhyay, S., Sokolov, A., Hudson, Z. M., Bou Zerdan, R., McGrath, A. J., Kramer, J. W., Barton, B. E., Hawker, C. J.
ACS Photonics
4 (3), pp 631–641

The design, synthesis, and characterization of solution-processable polymers for organic light emitting diode (OLED) applications are presented. Theoretical calculations were employed to identify a carbazole-pyrimidine based building block as an optimized host material for the emissive layer of an idealized OLED stack. Efficient, free radical homopolymerization and copolymerization with a novel methacrylate-based heteroleptic iridium(III) complex leads to a library of nonconjugated polymers with pendant semiconductors. Optoelectronic characterization reveals impressive photoluminescence quantum yield (PLQY) values exceeding 80% and single-layer OLEDs show optimal performance for copolymers containing 6 mol % of iridium comonomer dopant.