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Wavelength-adjustable organic light-emitting device

A technology of electroluminescent devices and organic light-emitting layers, applied in the direction of electric solid-state devices, electrical components, luminescent materials, etc., can solve the problems of light wavelengths that cannot meet people's needs, and can not be adjusted, so as to increase the density of common rail electron clouds, The effect of enhanced electron loss capability and improved resolution

Inactive Publication Date: 2021-03-26
苏州远卓科技信息有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the problems that the resolution and color purity of display devices in the prior art cannot meet people's needs and the wavelength of light cannot be adjusted, so as to provide a color purity, higher resolution, and user-configurable Organic Electroluminescent Devices with Adjustable Wavelength

Method used

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  • Wavelength-adjustable organic light-emitting device

Examples

Experimental program
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Effect test

Embodiment 1

[0042] This embodiment provides an organic electroluminescent device with adjustable wavelength, such as figure 1 As shown, it includes a substrate 1 , a total reflection layer 2 , an organic light-emitting unit 3 , an optical path control layer 4 , a transflective layer 5 , a light extraction layer 6 , a filter layer 7 and an encapsulation layer 8 which are sequentially stacked.

[0043] The substrate 1 includes a substrate, a thin film transistor (TFT) array layer and a flat layer, the thin film transistor (TFT) array is arranged on the substrate, and the flat layer is arranged on the thin film transistor (TFT) array structure. The substrate can be made of various materials such as glass, plastic, silicon or metal; in this embodiment, the substrate is made of glass.

[0044] The total reflection layer 2 is disposed on the substrate 1 and is used for reflecting the light emitted by the organic light emitting unit 3 as much as possible so as to improve the light extraction eff...

Embodiment 2

[0073] This embodiment provides a preparation method of a red fluorescent dye having a structure of formula (I), comprising the following steps:

[0074]

[0075]Under anhydrous conditions, the commercially available compound (I-1) (2mol, 732.42g), p-fluorobenzaldehyde (2mol, 248.06g), and trifluoromethanesulfonic acid (0.5mol, 75.04g) were dissolved in 50L of toluene, Stir to dissolve; heat to 100°C, add 3ml of 2,5-dihydro-1H-pyrrole, heat up to 130°C and reflux for 5 hours; naturally cool to room temperature, add saturated sodium bicarbonate solution, extract with dichloromethane, and distill under reduced pressure The product (I) is obtained.

[0076] Product (I) chemical formula: C 33 h 34 BF 2 N 3 ; m / z: 521.28 (100.0%), 522.28 (35.7%), 520.29 (24.8%), 521.29 (8.9%), 523.29 (5.1%), 522.28 (1.1%), 523.29 (1.1%); elemental analysis: C, 76.01; H, 6.57; B, 2.07; F, 7.29; N, 8.06.

Embodiment 3

[0078] This embodiment provides a method for preparing a green fluorescent dye with a structure of formula (II), comprising the following steps:

[0079]

[0080] Under a nitrogen atmosphere, a pentane solution of tert-butyllithium (1.5M, 12mmol) was slowly added to a solution of compound (II-1) (10mmol) in tert-butylbenzene (120ml), then heated to 120°C for 1.5 hours . After the reaction, cool down to -15°C, slowly add boron tribromide (15mmol), stir at -5°C for 0.5 hours, then continue to stir at 10°C for 1 hour, rise to 35°C, add N,N-diisopropyl Ethylamine (20 mmol), continued to heat up to 150° C. and continued the reaction for 3 hours before stopping. Distilled under reduced pressure and passed through a silica gel column (developing solvent: ethyl acetate:petroleum ether=30:1) to obtain the product (II).

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Abstract

The invention belongs to the technical field of display, and particularly relates to a wavelength-adjustable organic light-emitting device. The wavelength-adjustable organic light-emitting device comprises a total reflection layer, an organic light-emitting unit and a semi-reflecting and semi-transmitting layer which are sequentially arranged in a stacked mode, the organic light-emitting unit comprises a red light-emitting unit, and the red light-emitting unit comprises a first anode layer, a first organic light-emitting layer and a first cathode layer; and a red light optical path regulationand control layer used for continuously regulating and controlling red light wavelength changes is arranged between the first cathode layer and the semi-reflecting and semi-transmitting layer, a red light filter corresponding to the red light emitting unit is arranged on the semi-reflecting and semi-transmitting layer, and an optical micro-cavity is formed between the total reflection layer and the semi-reflecting and semi-transmitting layer. A user can continuously regulate and control the optical path of red light in the red light optical path regulation and control layer to change the optical path of the red light in the optical micro-cavity so that the wavelength of the red light emitted by the device is continuously regulated.

Description

technical field [0001] The invention belongs to the field of display technology, and in particular relates to an organic electroluminescent device with adjustable wavelength. Background technique [0002] Organic Light-Emitting Diode (OLED), as a current-mode light-emitting device, has become more and more popular due to its characteristics of self-luminescence, low driving voltage, high luminous efficiency, short response time, and high clarity and contrast. It is widely used in the field of high-performance display. [0003] Currently, more and more display devices use AMOLED display screens. AMOLED has pixels arranged in an array, and its mass production technology uses a fine metal mask (Fine Metal Mask, FMM) to prepare three sub-pixel units with red, green and blue, and then cooperates with a color filter (Color filter, CF) to obtain AMOLED displays with higher color purity and high resolution. However, as the market's requirements for screen color purity and resolut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/52H01L51/54C09K11/06H01L27/32
CPCC09K11/06C09K2211/1029C09K2211/1055C09K2211/1096C09K2211/1011H10K59/50H10K59/38H10K59/12H10K85/624H10K85/615H10K85/654H10K85/657H10K50/12H10K50/852H10K50/856
Inventor 王艳慧
Owner 苏州远卓科技信息有限公司
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