Comparison of Bipolar Hosts and Mixed‐Hosts as Host Structures for Deep‐Blue Phosphorescent Organic Light Emitting Diodes

Mix and match: A bipolar host material with hole-transport and electron-transport units was synthesized as the host material for deep-blue phosphorescent organic light-emitting diodes and was compared with other mixed-host materials with the same core structure. The bipolar host material showed similar current density and quantum efficiency to those of the mixed host. Detailed facts of importance to specialist readers are published as "Supporting Information". Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.