A kind of double-layer graphene film LED electrode material and preparation method thereof

A double-layer graphene and graphene film technology, applied in the direction of circuits, electrical components, semiconductor devices, etc., can solve the problems of poor heat dissipation performance, poor electrical conductivity, and poor light transmission performance of electrode materials, and achieve good light transmission characteristics, The effect of low price and excellent thermal conductivity

Active Publication Date: 2020-10-27
CHANGAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects and deficiencies of the existing preparation technology, the present invention provides a double-layer graphene film LED electrode material and its preparation method, which solves the problems of poor heat dissipation performance, poor light transmission performance and poor electrical conductivity of the existing electrode materials

Method used

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  • A kind of double-layer graphene film LED electrode material and preparation method thereof
  • A kind of double-layer graphene film LED electrode material and preparation method thereof
  • A kind of double-layer graphene film LED electrode material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] According to the above technical scheme, this embodiment provides a double-layer graphene film LED electrode material and a preparation method thereof, which specifically includes the following steps:

[0027] Step 1: Put the copper foil substrate with a purity of 99.8% into a vacuum tube furnace, then mix 15sccm of hydrogen, 20sccm of argon, 80sccm of methane and 3sccm of ammonia, and then pass them into the vacuum tube furnace together, and put the tube The furnace was heated to 1100°C for 20 minutes, and the graphene film grown on the surface of the copper foil was taken out after the end.

[0028] Step 2: Spin-coat the PMMA solution onto the graphene film grown on the surface of the copper foil prepared in step 1, specifically fix the graphene film on the glue-spinning machine, make the glue-spinning machine rotate at a speed of 1000r / min, and then apply the PMMA Solution is dripped on above-mentioned Graphene film, utilizes rotation centrifugal force to smear PMMA ...

Embodiment 2

[0032] Embodiment 2 (contrast):

[0033] The preparation method and test are the same as in Example 1, but step 3 is omitted, and molybdenum nitrogen doped graphene film is not added in step 5, and the electrode finally prepared is single-layer graphene rather than double-layer graphene film LED electrode material . It can be seen from Table 1 that its thermal conductivity is 240W / mK, which is significantly lower than the thermal conductivity of 350W / mK of the double-layer graphene film LED electrode material prepared in Example 1. from figure 2 It can be seen that its conductivity is significantly lower than that of Example 1.

Embodiment 3

[0034] Embodiment 3 (contrast):

[0035]The preparation method and test are the same as in Example 1, but step 4 is omitted, and no iridium-silver-nitrogen-doped graphene film is added in step 5, and the finally prepared electrode is single-layer graphene instead of double-layer graphene. It can be seen from Table 1 that its thermal conductivity is 270W / mK, which is significantly lower than the thermal conductivity of 350W / mK of the double-layer graphene film LED electrode material prepared in Example 1. from figure 2 It can be seen that its conductivity is significantly lower than that of Example 1.

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Abstract

The invention discloses a double-layer graphene film LED electrode material and a preparation method thereof. The double-layer graphene film LED electrode material is prepared by covering the surfaceof an LED chip with a double-layer graphene film, wherein the double-layer graphene film is a molybdenum-nitrogen doped graphene film / iridium-silver-nitrogen doped graphene film; the molar ratio of carbon to molybdenum to nitrogen in the molybdenum-nitrogen doped graphene film is (90-110):(0.6-1):(1-1.5), and the molar ratio of carbon to iridium to silver to nitrogen in the iridium-silver-nitrogendoped graphene film is (90-110):(0.9-1.2):(0.6-1):(0.6-1). The double-layer graphene film LED electrode material prepared by the invention has excellent heat conduction, light transmission and electric conduction. Due to the excellent light transmission, the double-layer graphene film LED electrode material is suitable for being used as a large-area electrode of a light-emitting surface, and thecurrent conduction capability is further enhanced. The preparation method is simple and safe in process, low in price of used equipment and raw materials and suitable for industrial large-scale preparation.

Description

technical field [0001] The invention belongs to the field of electronic materials and preparation thereof, and in particular relates to a double-layer graphene film LED electrode material and a preparation method thereof. Background technique [0002] LED is a semiconductor light-emitting diode. It is a photoelectric device that uses a solid semiconductor chip to recombine and release excess energy through carriers to cause photon emission. It is the technical basis of the current semiconductor lighting industry. [0003] The electrode material of LED is one of the key technologies that determine the performance of LED. First of all, the heat dissipation of LED is the core factor that determines its light decay and life. Secondly, because LED needs to emit light from the chip, in order to improve the lumen efficiency and external quantum efficiency to save energy, the light transmittance of the electrode is required to be high. Finally, it must have excellent electrical con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L33/40H01L33/00
CPCH01L33/005H01L33/40
Inventor 段理魏星郭婷婷王昭
Owner CHANGAN UNIV
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