Solar spectrum absorption film layer design method

A solar spectrum and design method technology, applied in the field of solar spectrum absorption film layer design, can solve the design and optimization of few processes, and achieve the goal of perfecting the design and process optimization methods, reducing the selection range, and reducing the loss of human labor. Effect

Active Publication Date: 2020-09-08
HARBIN INST OF TECH
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Problems solved by technology

The finite difference time domain method (FDTD) is an accurate and efficient electromagnetic wave simulation method. One of its important applications is to obtain the influence of submicron

Method used

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  • Solar spectrum absorption film layer design method
  • Solar spectrum absorption film layer design method
  • Solar spectrum absorption film layer design method

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Example Embodiment

[0040] Specific embodiment one:

[0041] Such as figure 1 As shown, the present invention provides a method for designing a solar spectrum absorption film, which includes the following steps:

[0042] Step 1: Determine the dielectric function of the pre-selected material;

[0043] The step 1 is specifically:

[0044] Step 1.1: Based on the environmental stability, hardness and toughness of the pre-selected material, select the type of material used, construct the unit cell model of the selected material in the Materials Studio crystal library, export it as a CIF file, and open it through the editor to extract the VASP required POSCAR information, and converted to POSCAR files;

[0045] Step 1.2: According to the element composition and unit cell model of the material, extract the PBE-GGA pseudopotential of the elements contained in the material, construct the POSCAR file, and obtain the KPOINTS file and INCAR file;

[0046] Step 1.3: Create a scf folder, convert the CONTCAR file obtai...

Example Embodiment

[0070] Specific embodiment two:

[0071] Step 1: Calculate the dielectric function of the pre-selected material by the first-principles method. Under the ideal surface state of the ideal bulk material, using the Fresnel formula, the spectral reflectance ρ and refraction of the material at the corresponding wavelength λ can be obtained The relationship between rate n and extinction coefficient k:

[0072]

[0073] In the solar spectrum, the thickness of the film must be greater than its skin depth. In the absence of transmission, the following formula is satisfied:

[0074]

[0075] It can be seen that the light absorption rate of the ideal bulk material surface is determined by the refractive index and extinction coefficient of the material, and the refractive index and extinction coefficient are actually related to the dielectric function:

[0076]

[0077]

[0078] Furthermore, based on the Kramers-Kronig dispersion relationship and the definition of the direct transition probabilit...

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Abstract

The invention relates to a solar spectrum absorption film layer design method. The method comprises the following steps: determining a dielectric function of a pre-selected material; compounding the dielectric functions of the materials with different proportions, calculating to obtain a dielectric function curve, and screening a composite material proportion meeting requirements; constructing a film layer structure model, and determining physical data of the film layer structure model; changing and optimizing a single physical variable, and selecting a structure model meeting requirements oran optimal structure model; and selecting, formulating and optimizing a film preparation process according to the screened composite material ratio and the optimal structure model. The preparation process of the non-magnetic high solar spectrum absorptivity film layer is designed and optimized, the selection range of part of parameters in the experiment process can be remarkably narrowed, human and material resource losses caused by wrong experiments are reduced, the optimal process is determined more rapidly and efficiently, and therefore the film layer development and production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of absorbing film design, and relates to a method for designing solar spectrum absorbing film layers. Background technique [0002] Films with high solar spectral absorptivity have been widely used in many fields such as solar energy collection, photothermal conversion, photoelectric conversion, energy storage, catalysis, metal surface and interface protection, information dissemination, and protection of optical sensors, involving many industries Applied and basic research content, its role is irreplaceable. [0003] At present, there are many kinds of films with high solar spectral absorptivity, but due to many factors affecting their performance, such as the physical properties of the selected materials, surface microstructure, and different material ratios, etc., they will affect the optical properties of the prepared films. , electricity, heat and other key performances will be affected. Although a va...

Claims

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Application Information

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IPC IPC(8): G06F30/20F24S70/20
CPCF24S70/20G06F30/20Y02E10/40
Inventor 卢松涛吴晓宏姚远李杨秦伟康红军
Owner HARBIN INST OF TECH
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