Organic electroluminescent device and organic electroluminescent apparatus

Abstract

The invention relates to the technical field of display, and discloses an organic light-emitting device and an organic electroluminescent apparatus. The organic electroluminescent device comprises a first electrode layer, a first carrier function layer, a light-emitting layer and a second electrode layer which are stacked in sequence, a P-doped layer is further arranged between the first carrier function layer and the light-emitting layer, and the P-doped layer is in direct contact with the light-emitting layer. Therefore, the energy level bending of the interface between the first carrier function layer and the light-emitting layer can be changed, the hole injection barrier at the interface between the first carrier function layer and the light-emitting layer is reduced, and the turn-on voltage of the organic electroluminescent device is effectively reduced. Specifically, when the organic electroluminescent device is applied, the turn-on voltage difference between the adjacent organicelectroluminescent devices can be reduced, so that the other organic electroluminescent devices cannot be lightened even if the generated carriers are migrated to the organic electroluminescent devices with other light-emitting colors through a common carrier functional layer, and the problem of color cast is solved.

Description

[0001] This application is a divisional application with an application date of June 29, 2018, an application number of 201810713383.5, and an invention title of "Organic Electroluminescent Device and Organic Electroluminescent Device". technical field [0002] The invention relates to the field of display technology, in particular to an organic electroluminescence device and an organic electroluminescence device. Background technique [0003] Organic electroluminescent display (English full name Organic Light Emitting Display, referred to as OLED) is an active light-emitting display device. Due to its advantages such as simple manufacturing process, low cost, high contrast, wide viewing angle, and low power consumption, it is expected to become the next generation of mainstream flat panel. Display technology is one of the most concerned technologies in flat panel display technology. [0004] figure 1 The voltage-brightness curves of the RGB three-color sub-pixels in the ex...

AI Technical Summary

Problems solved by technology

In practical applications, when the blue sub-pixels are turned on, although the voltage is mainly across the blue sub-pixels, due to the better conductivity of the common hole injection layer, some of the carriers generated in the blue sub-pixels will pass through the blue sub-pixels. The common hole injection layer is migrated to the green sub-pixel and / or the red sub-pixel, and since the turn-on voltage of the red sub-pixel and the green sub-pixel is small, the red sub-pixel and / or the green sub-pixel are easy to be lit at the same time

That is, in the case of low gray scale, the luminous brightness of the red sub-pixel and / or green sub-pixel cannot strictly meet the requirements to achieve the low-brightness display effect, and the low gray scale color cast (reddish) phenomenon occurs

Images