Abstract
By changing the thickness of hole transport layer to control the cavity length, a top-emitting white organic light-emitting diode (TWOLED) with three individual narrow peaks matching well with the three primary color filters has been successfully realized. It is very important to carefully design the multimode microcavity for the achievement of the three-peak spectrum. Compared with the bottom-emitting white organic light-emitting diodes (BWOLEDs), the TWOLEDs exhibit improved color purity and a wider color gamut due to the narrow emissive spectrum. The maximum current efficiency and power efficiency of TWOLED reach 28.9cd/A and 27.5lm/W, respectively. It is predicted that this kind of three-peak TWOLEDs is suitable for the high-quality display application.
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