Novel HIT and EB material matched organic light-emitting device

Abstract

The invention discloses a novel HIT and EB material matched organic light-emitting device, which is sequentially provided with a substrate, a first electrode, an organic functional material layer anda second electrode from bottom to top, and is characterized in that the organic functional material layer comprises: a hole transport region located on the first electrode; a light-emitting layer overthe hole transport region, the light-emitting layer including a host material and a guest material; and an electron transmission region which is located on the light-emitting layer. The hole transport region sequentially comprises a hole injection layer, a hole transport layer and an electron blocking layer from bottom to top, the hole injection layer comprises a hole transport layer material anda P-type doped material, and the hole transport layer comprises an organic compound containing dimethyl fluorenyl in the structure. The electron blocking layer comprises an organic electroluminescentdevice having improved luminous efficiency and lifespan, and a display comprising the same, and more particularly, to an organic electroluminescent device having improved luminous efficiency and lifespan, and an electronic device comprising the same.

Description

technical field [0001] The invention relates to the technical field of semiconductors, in particular to a novel organic electroluminescent device with a combination of HIT and EB materials and a display comprising the same. Background technique [0002] Organic electroluminescence (OLED: Organic Light Emitting Diodes) device technology can be used to manufacture new display products, and can also be used to make new lighting products. It is expected to replace the existing liquid crystal display and fluorescent lighting, and has a wide application prospect. Typically, an OLED is composed of several layers including a positive electrode, a negative electrode, a hole injection layer, a hole transport layer, an organic light emitting layer, an electron transport layer, and an electron injection layer. OLED light-emitting device is a current device. When a voltage is applied to the electrodes at its two ends, and the positive and negative charges in the organic layer functional ...

AI Technical Summary

Problems solved by technology

It is known that the injection and transport characteristics of the hole injection layer and the hole transport layer used in the existing organic electroluminescent devices are relatively weak, and the material HOMO energy level difference between the hole transport layer and the electron blocking layer is relatively large, which is easy to Formation of charge accumulation at the material interface, affecting device lifetime

At the same time, although the electron blocking layer has electron blocking properties, its hole transport properties are weak, which will also affect the device performance.

Images