Low Driving Voltage, High Quantum Efficiency, High Power Efficiency, and Little Efficiency Roll‐Off in Red, Green, and Deep‐Blue Phosphorescent Organic Light‐Emitting Diodes Using a High‐Triplet‐Energy Hole Transport Material

Improved device performance in red, green, and deep-blue phosphorescent organic light-emitting diodes is achieved using a new high-triplet-energy hole transport material. The driving voltage is lowered and the power efficiency is improved by more than 70% using the new hole transport material. 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.