A kind of tandem organic light emitting diode, array substrate and display device

Abstract

The invention discloses a serial organic light emitting diode, an array substrate and a display device, relates to the field of display technology, and aims to solve the problem that the serial organic light emitting diode requires a high driving voltage for normal light emission. The tandem organic light-emitting diode comprises an anode, a hole transport layer, a first light-emitting layer, a first charge generation layer, a second charge generation layer, a third charge generation layer, a second light-emitting layer, and an electron transport layer stacked in sequence and cathode; wherein, the first charge generation layer is an N-type bulk heterojunction, the second charge generation layer is a PN junction bulk heterojunction, and the third charge generation layer is a P-type bulk heterojunction. The array substrate includes a plurality of tandem organic light emitting diodes mentioned in the above technical solution, and the display device includes the array substrate mentioned in the above technical solution. The tandem organic light emitting diode provided by the present invention is applied to a display device.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a serial organic light emitting diode, an array substrate and a display device. Background technique [0002] At present, organic light-emitting diodes are widely used in display devices due to their low energy consumption, wide color gamut, wide viewing angle, and fast response. Among them, the current density of series organic light-emitting diodes is low, which can effectively avoid excess Due to the thermal quenching effect caused by the current, the tandem organic light emitting diode has become the core technology in the display device. [0003] The tandem organic light emitting diode in the prior art includes sequentially stacked anode, hole transport layer 1, light emitting layer 1, electron transport layer 1, charge generation layer, hole transport layer 2, light emitting layer 2, electron transport layer 2 and cathode. In the current tandem OLED, part of the carriers...

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Problems solved by technology

[0004] The object of the present invention is to provide a series organic light emitting diode, an array substrate and a display device, which are used to solve the high driving voltage required for the normal light emission of the series organic light emitting diode, which causes the energy consumption of the normal light emission of the series organic light emitting diode high problem

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