52‐4: Achievement of Blue Phosphorescent Organic Light‐Emitting Diode with High Efficiency, Low Driving Voltage, and Long Lifetime by Exciplex—Triplet Energy Transfer Technology

Efficient energy transfer from an exciplex to a phosphorescent dopant was successfully introduced to a blue phosphorescent organic light-emitting diode by carefully designing the exciplex and dopant. This energy transfer simultaneously achieved increase in quantum efficiency, decrease in driving voltage, and improvement in lifetime even in blue devices.