Graphene LED chip and preparation method thereof
An LED chip and graphene technology, applied in electrical components, circuits, semiconductor devices, etc., can solve the problems of poor light transmittance and conductivity, and the inability to make GaN electrodes, and achieves low absorption, thin overall thickness, and high emission. rate effect
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[0048] Example one
[0049] Such as figure 1 As shown, the present invention provides a graphene LED chip, including a substrate 10, a graphene transparent bottom electrode 21, a graphene layer 30 having a superlattice structure, a P-type semiconductor layer 31, an N-type semiconductor layer 32, and graphene transparent Upper electrode 22.
[0050] The graphene layer 30 having a superlattice structure is disposed between the graphene transparent lower electrode 21 and the P-type semiconductor layer 31. The N-type semiconductor layer 32 is disposed on the P-type semiconductor layer 31. The graphene transparent upper electrode 22 is disposed above the N-type semiconductor layer 32. That is, the N-type semiconductor layer 32 is provided between the P-type semiconductor layer 31 and the graphene transparent upper electrode 22.
[0051] The substrate 10 is a glass substrate, a quartz substrate, a silicon substrate, a plastic substrate, and a substrate formed by combining materials such...
Example Embodiment
[0058] Example two
[0059] This embodiment provides a method for preparing an ink-based LED chip.
[0060] First, the graphene film is prepared. A high-purity graphite powder layer is formed by coating on a quartz plate, and the quartz plate coated with the graphite powder layer is placed in a tubular boiler. The vacuum of the boiler is about 10 -5 Tor. The quartz sheet coated with the graphite powder layer is heat-treated at a temperature of 1200° C. to make the graphite powder layer form a graphene layer. After the boiler is slowly cooled, the graphene layer coated on the quartz plate can be peeled off from the cooled quartz plate to obtain a graphene layer containing laminated multilayer graphene films.
[0061] Then the graphene LED chip is prepared. Such as Figure 7 As shown, the steps for preparing a graphene LED chip are:
[0062] S11: Immerse the graphene layer containing the laminated graphene film in an aqueous sulfuric acid solution to separate the layers of the lamin...
Example Embodiment
[0079] Example three
[0080] This embodiment is a further improvement of any of the foregoing embodiments, and only the improved part is described.
[0081] According to a preferred embodiment, the graphene layer having a superlattice structure includes at least one graphene nanoribbon. The graphene layer having a superlattice structure is connected to the graphene transparent upper electrode and the P-type semiconductor layer and has a band shape.
[0082] The graphene nanoribbon layer 30a has at least one graphene nanoribbon. The opposite edges of the graphene nanoribbons can all have a zigzag shape. The graphene nanoribbons have a periodically varying width in the longitudinal direction. figure 2 Three nanoribbons 301a, 302a, and 303a in the graphene nanoribbon layer 30a are shown. The opposite edges of the graphene nanoribbons 301a all have a zigzag shape. The graphene nanoribbons 301a have a periodically varying width in the longitudinal direction.
[0083] The present inve...
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