Jump to main content
Jump to site search


High efficiency yellow organic light-emitting diodes with a solution-process feasible iridium based emitter

Author affiliations

Abstract

Yellow emission plays an important role in many display and lighting applications, such as RGBY display or blue hazard free lighting sources, while a wet-process enables soft devices to be manufactured cost-effectively. We demonstrate here that high efficiency yellow organic light-emitting diodes can be made with an innovative solution-process viable iridium based material, bis[5-methyl-7-fluoro-8-trifluoromethyl-5H-benzo(c)(1,5)naphthyridin-6-one]iridium(picolinate) (FCF3BNO). The device exhibits a power efficacy of 49.2 lm W−1 at 1000 cd m−2 with an external quantum efficiency of 22.7% with a spin-coated emissive layer. A National Television Standards Committee (NTSC) color saturation of 110% is achievable by employing the yellow emission along with the standard RGB. The high efficiency may be attributed to the electron-withdrawing F and CF3 substitutions in the emitter to prevent self-quenching from dense packing. We also found that high efficiency can be achieved for wet-processed devices simply by balancing the injected holes and electrons with the help of energy-level matching hosts. The resultant RGBY composed of pure white light is 8% more friendly than the typical RGB counterpart from a retina protection perspective and also 8% better with respect to melatonin secretion.

Graphical abstract: High efficiency yellow organic light-emitting diodes with a solution-process feasible iridium based emitter

Back to tab navigation
Please wait while Download options loads

Publication details

The article was received on 08 Apr 2017, accepted on 07 May 2017 and first published on 10 May 2017


Article type: Paper
DOI: 10.1039/C7TC01516J
Citation: J. Mater. Chem. C, 2017, Advance Article
  •   Request permissions

    High efficiency yellow organic light-emitting diodes with a solution-process feasible iridium based emitter

    J. Jou, S. Fu, C. An, J. Shyue, C. Chin and Z. He, J. Mater. Chem. C, 2017, Advance Article , DOI: 10.1039/C7TC01516J

Search articles by author