Organic light-emitting device, manufacturing method thereof, and display device
A technology of organic light-emitting devices and light-emitting layers, which is applied in semiconductor/solid-state device manufacturing, semiconductor devices, electric solid-state devices, etc. It can solve the problem of increasing the energy barrier of electron transmission, reducing the life of organic light-emitting devices, and making it difficult to generate holes in stacking, etc. problem, to achieve the effect of improving electron transfer rate, low driving voltage, and carrier transfer balance
Active Publication Date: 2019-05-07
WUHAN TIANMA MICRO ELECTRONICS CO LTD
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[0003] However, in the charge generation layer of the above structure, electrons tend to accumulate at the interface between the n-type charge generation layer and the p-type charge generation layer, which is not conducive to electron transfer from the p-type charge generation layer to the n-type charge generation layer, increasing the number of electrons Transmitted energy barrier, and indirectly increased the driving voltage, in addition, the accumulation of electrons makes it difficult to generate holes in the stack, such as figure 1 As shown, it will affect the stack adjacent to the p-type charge generation layer (the second stack shown in the figure) to provide holes, which will reduce the lifetime of the organic light-emitting device
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[0061] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.
[0062] Such as figure 2 with image 3 As shown, the present invention provides an organic light-emitting device, comprising: a first electrode layer 1 and a second electrode layer 2 arranged oppositely, at least two stacked layers arranged between the first electrode layer 1 and the second electrode layer 2 Layer 3, each laminated layer 3 at least includes a light-emitting layer 31; also includes:
[0063] A charge generation layer 4 of a single-layer structure located between any two adjacent stacked layers 3, each charge generation layer 4 includes: an electron transport material layer 41 containing at least one nitrogen heterocycle, and an electron transport lay...
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The invention provides an organic light-emitting device, a preparation method thereof, and a display device, which are used to simplify the structure, improve the luminous efficiency and reduce the driving voltage. Wherein the organic light-emitting device includes: a first electrode layer and a second electrode layer oppositely arranged, at least two stacked layers arranged between the first electrode layer and the second electrode layer, each stacked layer includes at least a light-emitting layer; : A charge generation layer of a single-layer structure located between any adjacent two stacked layers, each charge generation layer includes: an electron transport material layer containing at least one nitrogen heterocycle, and an electron transport material layer containing at least one nitrogen heterocycle There are n-type dopants and p-type dopants inside.
Description
technical field [0001] The invention relates to the technical field of displays, in particular to an organic light-emitting device, a preparation method thereof, and a display device. Background technique [0002] Such as figure 1 As shown, in the prior art, the white organic light-emitting device structure includes: a substrate 01, a first electrode layer 02 and a second electrode layer 03 formed on the substrate 01 and oppositely arranged; the first electrode layer 02 and the second electrode layer 03 are provided with a first stack 04, a charge generation layer 05, and a second stack 06 in sequence. The charge generation layer is composed of an n-type charge generation layer 051 and a p-type charge generation layer 052, wherein the n-type charge generation layer is made of organic The p-type charge generation layer is composed of an organic matrix and p-type dopants. The n-type charge generation layer and the p-type charge generation layer enable electrons or holes rece...
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IPC IPC(8): H01L51/50H01L51/52H01L51/56
CPCH10K50/165H10K50/805H10K50/856H10K71/00
Inventor 舒鹏王湘成牛晶华刘营梁英达
Owner WUHAN TIANMA MICRO ELECTRONICS CO LTD