High-performance hybrid white organic light-emitting diodes employing p-type interlayers

• A simplified but high-performance hybrid WOLED has been developed.
• We systematically demonstrate that the use of p-type IL is a new way to realize high-performance hybrid WOLEDs.
• A CRI of 85 is obtained at 100 cd/m2, which is the highest value among the WOLEDs with the simplified P-IL-F structures.
• The device exhibits rather low efficiency roll-off.
• The maximum total CE and PE of 29.8 cd/A and 20.9 lm/W are obtained, respectively.

A simplified hybrid white organic light-emitting diode (WOLED) employing a p-type interlayer is designed, simultaneously realizing high efficiency, high color rendering index (CRI), low efficiency roll-off, low voltage and stable color. The device exhibits maximum total efficiencies of 29.8 cd/A and 20.9 lm/W, which slightly decrease to 28.6 cd/A and 16.5 lm/W even at a high luminance of 5000 cd/m2. Besides, a slight color-shift and a CRI of 85 at 100 cd/m2 (3.65 V) are obtained. Such superior results systematically demonstrate that the use of p-type interlayer is a new way to realize high-performance hybrid WOLEDs.

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