Phosphorescent platinum(II) complexes for white organic light-emitting diode applications

Abstract

The applications of phosphorescent platinum(II) complexes in white organic light-emitting diode (WOLED) are discussed. White electroluminescence formed by complementary colors mixing has been achieved by employing phosphorescent platinum(II) complexes as dopants. The approach is to mix triplet monomer emissions of the platinum(II) dopant complexes at orange-red region with a blueemitting component or, alternatively, to mix the emissions from both monomer and aggregate states of the same platinum(II) complex in the blue-green (λmax ~ 480nm) and orange-red (λmax ~ 600 nm) regions. Platinum(II) material-based WOLEDs could be fabricated from both thermal deposition and solution process, since polymeric WOLED materials could be prepared by incorporating platinum(II) complexes in polymer backbone. TheWOLEDs fabricated from platinum(II) complexes exhibit good Commission Internationale de l'Eclairage, color-rendering index, and device efficiency, which may find potential applications for solid-state lighting. © Springer-Verlag Berlin Heidelberg 2010.