Solution processed deep blue phosphorescent organic light-emitting diodes with over 20% external quantum efficiency

Highly efficient solution processed deep blue phosphorescent organic light-emitting diodes (PHOLEDs) were developed using a solution processible high triplet energy host and deep blue dopant materials. Stable film morphology was observed from the spin coated deep blue emitting layer and a high quantum efficiency of 22.1% was achieved in the deep blue PHOLED with a color coordinate of (0.14, 0.19).

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► High efficiency solution processed deep blue organic light emitting diodes. ► Above 20% external quantum efficiency in solution deep blue device. ► Deep blue color coordinate of (0.14, 0.19) in solution device.