OLED display device, display substrate and manufacturing method thereof
A technology for display devices and display substrates, applied in semiconductor/solid-state device manufacturing, semiconductor devices, electric solid-state devices, etc., can solve problems such as heat generated by OLED display devices, color shift of OLED display devices, etc.
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Embodiment 1
[0037] like figure 1 and 2 As shown, this embodiment provides an OLED display device, including: an anode, a cathode, and a light-emitting layer 3 located between the cathode and the anode. The material of the light-emitting layer 3 usually includes an organic light-emitting material. The light-emitting principle of the OLED display device is: driven by an electric field, the organic light-emitting material causes light-emitting through carrier injection and recombination. Specifically, OLED display devices usually use ITO pixel electrodes and metal electrodes as the anode and cathode of the device, respectively. Under a certain voltage drive, electrons and holes are injected from the cathode and anode to the electron transport layer 7 and the empty transport layer 5 respectively. and holes migrate to the light-emitting layer 3 respectively, and meet in the light-emitting layer 3 to form excitons and excite the light-emitting molecules, which emit visible light through radia...
Embodiment 2
[0050] This embodiment provides a display substrate, including a plurality of display devices, at least some of the display devices include the OLED display device provided in any one of Embodiment 1.
[0051] In the display panel, it is usually necessary to set display devices of different colors to realize full-color display. For example, three different color OLED display devices of R (Red; red) G (Green; green) B (Blue; blue) are used to form a pixel unit. In this embodiment, the display substrate is formed based on the OLED display device provided in Embodiment 1, which can effectively avoid display errors of the display substrate caused by temperature changes, and improve the performance of the display substrate.
[0052] The light-emitting color of the OLED display device is determined by the material of the organic light-emitting layer 3 therein, and the organic light-emitting materials in the OLED display device with different light-emitting colors are different. The ...
Embodiment 3
[0059] This embodiment provides a method for preparing an OLED display device, including:
[0060] S1, forming the first electrode 1 on the substrate.
[0061] In this step, the first electrode layer may be formed on the substrate by means of evaporation, sputtering, deposition, etc., and then the first electrode layer may be patterned through an etching process, thereby forming the first electrode 1 .
[0062] S2 , forming a light-emitting layer 3 on the first electrode 1 . The materials of the light-emitting layer 3 at least include: organic light-emitting materials and thermo-phase-change materials; in the first temperature range, the fluorescence intensity of the thermo-phase-change materials decreases as the temperature increases; the first electrode 1 and the second electrode 2, one is the anode and the other is the cathode.
[0063] It can be understood that, in this embodiment, when the light-emitting layer 3 of the OLED display device is formed on the substrate, the...
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