White light-emitting diodes based on an all-phosphorescent supramolecular polymer

Abstract

Novel white light-emitting supramolecular phosphorescent polymers (SPPs) as a new class of solution-processable electroluminescent emitters have been first synthesized by efficient non-bonding assembly between bis(dibenzo-24-crown-8)-functionalized iridium complex monomers and bis(dibenzylammonium)-tethered co-monomers. These SPPs display good film morphology and high glass transition temperatures. The OLED device with a configuration of ITO/PEDOT:PSS/SPPs/CsF/Al exhibited a maximum luminous efficiency of 3.91 cd A⁻¹ with the Commission Internationale de L'Eclairage (CIE) coordinates of (0.46, 0.42), as the concentration of the monomer (FPyCr)₂Irpic is 1 mol%. This approach is promising for realization of solution-processable all-phosphorescent materials for white organic light-emitting diodes.