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A kind of flexible transparent electrode and preparation method thereof
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A transparent electrode and flexible technology, applied in the field of electrodes, can solve the problems of no transparent electrode preparation, achieve the effects of short production cycle, easy realization, and improved bending and stability
Active Publication Date: 2019-06-18
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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However, there are no research results on the application of this technology to the preparation of transparent electrodes.
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Embodiment 1
[0048] (1) Use a transparent glass plate with a thickness of 0.5-1cm as the substrate, after cleaning with alcohol, use electron beam evaporation technology to deposit a metal cathode on each adjacent side of the substrate with a thickness of 30-50nm, and the material is selected from gold ;
[0049] (2) Adhering a PET film with a thickness of 0.1 to 1 cm on the surface of the substrate;
[0050] (3) Preparation of 0.05M copper sulfate CuSO 4 / H 2 SO 4 The solution is injected into the glass microtube, and one side of the metal cathode is selected, and connected to the negative pole / ground wire of the external DC power supply through a metal wire, and the metal wire connected to the positive pole of the external DC power supply is inserted into the glass microtube, along with the needle tip of the glass microtube and the metal When the cathode slowly approaches a certain distance, the liquid at the needle tip first contacts the metal cathode to generate a loop current, and ...
Embodiment 2～5
[0057] The preparation process is the same as in Example 1, except that the humidity in the electrochemical deposition process in step (3) is replaced by 50% RH, 60% RH, 80% RH and 90% RH respectively.
[0058] It has been found through experiments that during the deposition process of Example 2, due to the low ambient humidity, the formed liquid bridge solidifies too quickly, and the Cu 2+ The 2 electrons obtained are quickly reduced to metal Cu, which blocks the needle tip, hinders the movement of the glass microtube, and causes the deposition process to no longer proceed.
[0059] Comparing the deposition process of Examples 4-5, it is found that relative to 80% RH, when the humidity is 90% RH, the time for depositing micro / nano wires of the same size will be extended by about 20%, which increases the production cycle.
Embodiment 6～8
[0061] The preparation process was the same as in Example 1, except that the deposition voltages in the electrochemical deposition process of step (3) were replaced by 0.4V, 0.5V and 0.7V respectively.
[0062] After testing, it was found that the surface roughness of the copper wires corresponding to the application of voltages of 0.4V, 0.5V and 0.7V were 0.1 μm, 0.07 μm and 0.09 μm respectively.
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Abstract
The invention discloses a flexible transparent electrode. The flexible transparent electrode comprises a flexible transparent thin film; the surface of the flexible transparent thin film is deposited with conductive curve type micron / nano wires; and the curve types comprise a spiral type and / or a ripple type. The preparation method for the flexible transparent electrode comprises the steps of (1) gluing the flexible transparent thin film on a base; (2) preparing a conductive negative electrode on one side or on two adjacent sides of the base in the step (1); and (3) preparing a micron / nano wire precursor solution, and taking the conductive negative electrode as the starting point, enabling the curve type micron / nano wires to be grown on the flexible transparent thin film by adopting an electrochemical deposition method. According to the flexible transparent electrode provided by the invention, low resistance and high light transmittance are ensured while the bending property and stability of a device are greatly improved.
Description
technical field [0001] The invention relates to the technical field of electrodes, in particular to a flexible transparent electrode and a preparation method thereof. Background technique [0002] Transparent conductive electrodes are important components of various electronic devices, including touch screens, displays, and thin-film solar cells. At present, transparent conductive electrodes generally use metal oxides, such as ITO thin films. Due to the limited reserves of some key metal elements in oxide electrodes, such as indium, and the need for vacuum coating equipment and technology for metal oxide films, these factors lead to rising costs of the electrodes; more critically, due to the intrinsic brittleness of metal oxides, etc., As a result, it cannot be applied to the emerging flexible devices, such as flexible thin-film solar cells, flexible touch screen displays, and electronic skins. [0003] At present, the main alternative materials include: graphene, carbon n...
Claims
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Application Information
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