Researchers use TAT materials to create circularly polarised OLEDs emitters

Researchers from the University of Cambridge and the Eindhoven University of Technology developed a new OLED emitter that emits circularly polarised light. The researchers used molecular design tricks inspired by nature to create a chiral semiconductor by nudging stacks of semiconducting molecules to form ordered right-handed or left-handed spiral columns.

Chiral semiconductors could be very attractive as OLED emitters, as these could be more efficient as there's no need to add an external polarizer filter. The material used in this research is triazatruxene (TAT) that self-assembles into a helical stack. When excited by blue or ultraviolet light, TAT emits bright green light with strong circular polarisation.