High-efficiency low color temperature organic light emitting diodes with solution-processed emissive layer

► Low color temperature OLEDs with lesser melatonin suppression are fabricated. ► A warm-white OLED with CT of 2860 K is fabricated with a 22.8% EQE at 100 cd/m2. ► A non-white low CT 2280 K OLED is fabricated with a 27.4% EQE at 100 cd/m2.