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1. CN107359264 - QLED, preparation method and display apparatus

Office China
Application Number 201710654996.1
Application Date 03.08.2017
Publication Number 107359264
Publication Date 17.11.2017
Grant Number 107359264
Grant Date 31.12.2019
Publication Kind B
IPC
H01L 51/50
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
51Solid state devices using organic materials as the active part, or using a combination of organic materials with other materials as the active part; Processes or apparatus specially adapted for the manufacture or treatment of such devices, or of parts thereof
50specially adapted for light emission, e.g. organic light emitting diodes (OLED) or polymer light emitting devices (PLED)
H01L 51/56
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
51Solid state devices using organic materials as the active part, or using a combination of organic materials with other materials as the active part; Processes or apparatus specially adapted for the manufacture or treatment of such devices, or of parts thereof
50specially adapted for light emission, e.g. organic light emitting diodes (OLED) or polymer light emitting devices (PLED)
56Processes or apparatus specially adapted for the manufacture or treatment of such devices or of parts thereof
H01L 51/54
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
51Solid state devices using organic materials as the active part, or using a combination of organic materials with other materials as the active part; Processes or apparatus specially adapted for the manufacture or treatment of such devices, or of parts thereof
50specially adapted for light emission, e.g. organic light emitting diodes (OLED) or polymer light emitting devices (PLED)
54Selection of materials
CPC
H01L 51/0035
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
51Solid state devices using organic materials as the active part, or using a combination of organic materials with other materials as the active part; Processes or apparatus specially adapted for the manufacture or treatment of such devices, or of parts thereof
0032Selection of organic semiconducting materials, e.g. organic light sensitive or organic light emitting materials
0034Organic polymers or oligomers
0035comprising aromatic, heteroaromatic, or arrylic chains, e.g. polyaniline
H01L 51/502
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
51Solid state devices using organic materials as the active part, or using a combination of organic materials with other materials as the active part; Processes or apparatus specially adapted for the manufacture or treatment of such devices, or of parts thereof
50specially adapted for light emission, e.g. organic light emitting diodes [OLED] or polymer light emitting devices [PLED]
5012Electroluminescent [EL] layer
502comprising active inorganic nanostructures, e.g. luminescent quantum dots
H01L 51/56
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
51Solid state devices using organic materials as the active part, or using a combination of organic materials with other materials as the active part; Processes or apparatus specially adapted for the manufacture or treatment of such devices, or of parts thereof
50specially adapted for light emission, e.g. organic light emitting diodes [OLED] or polymer light emitting devices [PLED]
56Processes or apparatus specially adapted for the manufacture or treatment of such devices or of parts thereof
Applicants QINGDAO HISENSE ELECTRIC CO., LTD.
青岛海信电器股份有限公司
Inventors LIU ZHENGUO
刘振国
SONG ZHICHENG
宋志成
LIU WEIDONG
刘卫东
Agents 北京弘权知识产权代理事务所(普通合伙) 11363
北京弘权知识产权代理事务所(普通合伙) 11363
Title
(EN) QLED, preparation method and display apparatus
(ZH) 一种QLED、制备方法及显示装置
Abstract
(EN)
The invention provides a QLED, a preparation method and a display apparatus. The QLED comprises a substrate, a positive electrode, a hole transport layer, a light emitting layer, an electron transport layer and a negative electrode in sequence; the light emitting layer comprises quantum dots and a dispersing agent with a dendritic molecular structure; and the quantum dots are dispersed among side chains of the dendritic molecules. Compared with long-chain ligands on the surfaces of the quantum dots, an insulating layer is not formed on the surfaces of the quantum dots in the dendritic molecular structure, so that charge injection potential barrier of impedance, holes and electrons to the quantum dots on the surfaces of the quantum dots can be greatly lowered; in addition, the spacings between the quantum dot molecules, between quantum dots and the electron transport layer, and between the quantum dots and the hole transport layer can be closer, thereby improving the concentration of the quantum dots in the light emitting layer, and the exciton energy transfer efficiency; and by virtue of the OLED, the dispersity and yield of the quantum dots can be ensured while the current carrier energy transfer validity can be reinforced, thereby enhancing the light emitting efficiency of the OLED and the luminance of the OLED display apparatus.

(ZH)
本申请提供了一种QLED、制备方法及显示装置。其中,QLED依次包括基板、阳极、空穴传输层、发光层、电子传输层以及阴极,发光层包括量子点和具有树枝状分子结构的分散剂,量子点分散在树枝状分子的侧链之间。与量子点表面的长链配体相比较,分布在树枝状分子结构中的量子点的表面不会形成绝缘层,能够大幅降低量子点表面阻抗以及空穴和电子到量子点的电荷注入势垒;另外,量子点分子之间,量子点与电子传输层、空穴传输层之间的间隔更近,从而提高发光层中量子点的浓度,以及激子能量转移的效率。本QLED能够在保证量子点分散性和量子产率的同时,增强载流子能量转移的有效性,从而增强QLED的发光效率以及QLED显示装置的亮度。