DISPLAY APPARATUS HAVING A LIGHT-EMITTING DEVICE

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DISPLAY APPARATUS HAVING A LIGHT-EMITTING DEVICE

This abstract first appeared for US patent application 20250143065 titled 'DISPLAY APPARATUS HAVING A LIGHT-EMITTING DEVICE

Original Abstract Submitted

a display apparatus including a light-emitting device is discussed. the light-emitting device can include a light-emitting unit between an anode electrode and a cathode electrode. the light-emitting unit can include at least one blue emission stack. the blue emission stack can include a first light-emitting layer and a second light-emitting layer contacting a surface of the first light-emitting layer toward the cathode electrode. a host of the second light-emitting layer can have a higher triplet energy level than a host of the first light-emitting layer. thus, in the display apparatus, deterioration in the efficiency and life-span of the light-emitting device due to the accumulation of triplet excitons can be prevented or minimized. as a result, low power driving is possible, and power consumption is reduced.