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Topological insulator flexible transparent conductive material and its preparation method and application
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A technology of topological insulators, nanomaterials, applied in conductive layers on insulating carriers, cable/conductor manufacturing, nanotechnology for materials and surface science, etc. , to achieve the effect of high electrical conductivity, excellent mechanical properties and high light transmittance
Active Publication Date: 2016-04-20
PEKING UNIV
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However, in practical applications, these transparent electrodes are limited due to their own properties, such as: under the conditions of heating and ultraviolet light, the doped carbon nanotube electrodes will reduce the conductance due to the desorption of surface adsorbates; And the surface is easy to corrode in the oxidizing environment, and it is restricted
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Embodiment 1
[0080] Example 1: Preparation of a flexible transparent conductive film with a regular network structure of topological insulators
[0081] 1) Fluorphlogopite KMg with a clean surface and a thickness of 30 μm was obtained by mechanical exfoliation 3 (AlSi 3 0 10 )F 2 ,by figure 1 The square carbon-free copper mesh shown is the mask plate (the aperture size is 160 × 160 μm, and the rib width is 30 μm. The dark area is covered with Bi 2 Se 3 film with a network structure, the light-colored part is the fluorine phlogopite substrate), plasma etching was carried out in the air atmosphere, the etching power was 90W, and the time was 15min to obtain a patterned fluorine phlogopite substrate;
[0082] The structure of the carbon-free copper mesh is as follows figure 1 As shown in No. 2, the specification is 1.2cm×1.2cm, mesh ( figure 1 No. 3) The side lengths are 50μm, 60μm, 90μm, and 160μm in four specifications, and the rib width ( figure 1 No. 4) are all 30μm;
[0083] 2) ...
Embodiment 2
[0115] Example 2: Preparation of topological insulator random network structure flexible transparent conductive film
[0116] 1) Add 5 μL of poly-L-lysine solution with a ratio of 0.1 g:1000 mL of poly-L-lysine to water to 1 mL of Au sol with a diameter of 20 nm and mix well, then add drop-wise to clean Si (100 ) on the base, make it dry naturally, and complete the functional modification of the base;
[0117] 2) Set Bi 2 Te 3 Block crystals (produced by AlfaAesar, with a purity of 99.999%) were ground into powder as a volatilization source and placed in the middle of the quartz tube, that is, in the middle of the gas flow direction. The functionally modified substrate obtained in step 1) was placed below the gas flow direction and 11cm away from the volatilization source- 15cm, and then place the quartz tube in the tube furnace;
[0118] Start the vacuum pump, pump the quartz tube to a base pressure of 100mTorr (1Torr=1mmHg=133.3Pa), turn off the vacuum pump and open the g...
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Abstract
The invention discloses a flexible transparent conductive material of a topological insulator and a preparation method and application of the flexible transparent conductive material of the topological insulator. The preparation method of the flexible transparent conductive material of the topological insulator includes the steps of patterning or functionally modifying a substrate, placing the topological insulator in the middle of the gas flow direction, placing the substrate obtained in the step 1 under the gas flow direction, introducing carrier gas into a reactor for deposition, stopping introducing the carrier gas after the deposition is completed, cooling the substrate to the room temperature and finally obtaining the topological insulator material on the surface of the substrate. The flexible transparent conductive thin film or nano-material obtained with the method has high light transmission performance in a wide wavelength range, particularly in a near infrared region. Besides, a stable conductive channel can be provided by utilizing the special metal surface state of the topological insulator, so that the flexible transparent conductive material has high conductivity, excellent disturbance rejection performance and mechanical properties. The novel flexible transparent photoelectric element can be used in the fields of photoelectronics, nanoelectronics and the like.
Description
technical field [0001] The invention relates to a topological insulator flexible transparent conductive material and a preparation method and application thereof. Background technique [0002] Topological insulators are a new class of quantum states in which the bulk phase is an insulator with an energy gap and the surface is a metal state without an energy gap. Due to the intrinsic spin-orbit coupling, the metallic surface states of topological insulators have a linear energy dispersion relationship, and the spin and momentum of the surface state electrons satisfy a specific chiral relationship. Moreover, this surface state is strictly topologically protected from losing metallicity due to external perturbations, and the carriers can conduct on the surface without scattering. Based on the unique electronic band structure and excellent properties in light, heat, electricity, magnetism, and mechanics, topological insulators have attracted extensive attention in the fields of...
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