High-efficiency organic luminescent device and its production method

Abstract

The invention relates to an efficient organic light-emitting device and a preparation method thereof, which belongs to the structural design of the organic light-emitting device and the preparation method thereof. The efficient organic light-emitting device is applicable to the light-emitting display and a flat light source. A substrate (1) is provided with an anode electrode (2); the anode electrode (2) is provided with a hole transmission layer (3); the hole transmission layer (3) is provided with a light-emitting layer (4) which comprises a donor layer (8) and a doped layer (9) which are prepared in the sequential steaming method and arranged periodically; the light-emitting layer is provided with a hole blocking layer (5); the hole blocking layer (5) is provided with an electronic transmission layer (6); and the electronic transmission layer (6) is provided with a cathode electrode (7). When the sequential doping method is used for preparing the efficient organic light-emitting device, the thickness of the donor layer, the thickness of the doped layer and the number of the periodic structures in the light-emitting layer are all design parameters which can be optimized. Therefore, the invention can be used for manufacturing the organic light-emitting device with higher efficiency, and can be applied to the full-color display, a solid-state light source, an LCD backlight source and a micro display device.

Description

technical field [0001] The invention is a device applied to light-emitting display and plane light source, and relates to the technical field of structural design and preparation method of organic light-emitting devices. Background technique [0002] Organic light-emitting has great application prospects in flat panel displays and solid-state light sources. Since the organic light-emitting structure was first proposed (US Pat. No. 4,356,429), people have carried out a lot of research on organic light-emitting devices. In these studies, doping is usually used to improve the external quantum efficiency of phosphorescent organic light-emitting devices and fluorescent light-emitting devices. In these devices, the donor material and dopant material are evaporated simultaneously from multiple evaporation sources to prepare the light-emitting layer (random doping). In phosphorescent organic light-emitting devices, the efficiency is four times higher than that of ordinary fluoresc...

AI Technical Summary

Problems solved by technology

Because it is difficult to achieve precise control of the ratio of donor material and dopant material by adjusting the different evaporation rates of the two evaporation sources, it is difficult to optimize the device performance

In addition, when producing organic light-emitting devices in batches, it is difficult to control the consistency in performance of different batches of devices

Images