Anti-reflecting heterojunction composite coating and preparation method thereof

A composite coating and heterojunction technology, which is applied in chemical instruments and methods, semiconductor/solid-state device manufacturing, photovoltaic power generation, etc., can solve the problems of unfavorable multi-functionalization of biomimetic cone materials and limit the scope of application, so as to improve the optoelectronic Conversion efficiency, high-efficiency photoelectric conversion efficiency, and the effect of broadening the range of use

Active Publication Date: 2016-09-28
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the biomimetic cone structures currently constructed are mainly concentrated on single crystal silicon materials, and have not been extended to o...

Method used

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  • Anti-reflecting heterojunction composite coating and preparation method thereof
  • Anti-reflecting heterojunction composite coating and preparation method thereof
  • Anti-reflecting heterojunction composite coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1) Preparation of micron-sized silicon cones:

[0036] Cut the 100-type single crystal silicon wafer into 1.5cm×1.0cm, and ultrasonically clean it in acetone, chloroform, ethanol and water for 5 minutes to remove the contamination on the surface of the silicon wafer; then place the cleaned silicon wafer in a concentration of 1mol / L hydrogen In the isopropanol solution of potassium oxide, under the condition of mechanical stirring, etch in a water bath at 50°C for 30min, to obtain silicon cones with an average height of 3μm, such as figure 2 shown.

[0037] 2) Preparation of PDMS soft template:

[0038] Mix the PDMS prepolymer and the curing agent at a mass ratio of 10:1, pour it on the silicon cone structure, put it in an oven at 75 ° C for 2 hours, and peel it off from the rigid template after cooling to obtain a silicon cone template structure. Complementary PDMS soft template.

[0039] 3) TiO 2 Sol preparation:

[0040]First, mix 5mL of n-tetrabutyl titanate wi...

Embodiment 2

[0046] Surface reflectance of anti-reflection heterojunction composite coating:

[0047] Gained PANI / TiO in embodiment 1 2 / Si for anti-reflection performance testing, using an integrating sphere to collect its reflection spectra in ultraviolet, visible, and near-infrared, the results are shown in Figure 5 , in which conical TiO without PANI nanoparticles on the surface 2 (TiO 2 / Si) and planar TiO 2 As a comparative sample (F-TiO 2 / Si). PANI / TiO 2 Micrometer-sized cones and nanometer-sized particles in Si / Si can achieve good anti-reflection in both long-wave and short-wave ranges, and the reflectivity can reach as low as 3%, which is much lower than that of TiO 2 / Si and F-TiO 2 / Si sample reflectance.

Embodiment 3

[0049] Photoelectric properties of anti-reflection heterojunction composite coatings:

[0050] Gained PANI / TiO in embodiment 1 2 / Si for photocurrent detection, see the results Figure 6 , in which the conical TiO without polyaniline nanoparticles on the surface 2 (TiO 2 / Si) as a comparative sample. During the test, the sample to be tested is used as the working electrode, the conductive glass coated with platinum is used as the counter electrode, Ag / AgCl is used as the reference electrode, and 0.3mol / L Na 2 SO 4 As the electrolyte, the xenon lamp is a simulated sunlight light source. In the absence of light, the electrons in the semiconductor are confined in the valence band, so there is no directional movement of electrons in the circuit, and no current is generated. When light is applied to the working electrode, electrons are excited to jump from the valence band to the conduction band, and a current is generated in the circuit. Under the same light conditions, wit...

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Abstract

The invention relates to the technical field of photoelectric materials, in particular to an anti-reflecting heterojunction composite coating and a preparation method thereof. Firstly, the anisotropy of alkali liquor is used for etching monocrystalline silicon, and a conical structure in micron size is obtained; then, by a soft template printing technology, the silicon cone structure is transferred to the surface of a rigid base, wherein the surface of the rigid base is attached to a transition metal oxide, and a conical transition metal oxide is obtained; finally, by an in-situ oxide method, conductive macromolecule nano particles grow on the surface of the conical transition metal oxide, and a transition metal oxide and conductive macromolecule composite coating using the rigid base as a carrier is formed. The composite coating has the micro-nano multistage structure, so that excellent anti-reflecting performance is realized; meanwhile, a p-n heterojunction is formed at a transition metal oxide and conductive macromolecule assembly boundary surface; the efficient photogenerated charge separation capability is given to the composite coating; the photoelectric converting efficiency is improved. The composite coating effectively utilizes incident light, and has high application prospects as a photoelectric material.

Description

technical field [0001] The invention relates to the technical field of photoelectric materials, in particular to an anti-reflection heterojunction composite coating and a preparation method thereof. Background technique [0002] Due to the existence of light reflection at the interface, a large amount of sunlight incident on the surface of the material is reflected. On the one hand, it causes the loss of solar energy, and on the other hand, it seriously affects the efficiency of optoelectronic devices. It is well known that the root cause of high reflection is a sudden change in the refractive index at the interface. Therefore, in order to reduce the reflection of light on the surface of materials, people start with the related work of slowing down the sudden change of refractive index at the interface. [0003] At present, the means of slowing down the sudden change of refractive index are mainly multi-layer film method and bionic method. Although the multilayer film meth...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J35/02H01L51/42H01L51/44
CPCB01J21/063B01J35/004B01J35/02H10K30/87B01J21/06Y02E10/549
Inventor 石刚李赢倪才华东为富张生文白绘宇
Owner JIANGNAN UNIV
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