Efficiency Control in Iridium Complex-Based Phosphorescent Light-Emitting Diodes

<table>Energy structure between host and dopant in a PhOLED, S<sub>1</sub> represents the singlet excited states, T<sub>1</sub> the triplet excited states, and S<sub>0</sub> the ground states.</table>

Advances in Materials Science and Engineering

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Figure 1

Figure 1: Efficiency Control in Iridium Complex-Based Phosphorescent Light-Emitting Diodes 