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Method for improving light absorption of solar thin-film cell material silicon

A solar cell, light absorption technology, applied in the field of solar photovoltaic

Inactive Publication Date: 2013-10-02
NINGBO UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The literature has reported the application of metal nano-core shells in the fields of surface-enhanced Raman, bioluminescence and medical diagnosis, but there is no report on its application to improve the light absorption of semiconductor thin films.

Method used

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  • Method for improving light absorption of solar thin-film cell material silicon
  • Method for improving light absorption of solar thin-film cell material silicon
  • Method for improving light absorption of solar thin-film cell material silicon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The particles of the silver nano-core-shell structure grown by chemical method, the diameter of the selected silver nano-core-shell structure is 400nm, and the thickness of the silver shell layer is about 50nm. Its SEM photos are as figure 1 As shown, it is dispersed in ethanol, and the silver nanoparticle solution is coated on the surface of the grown polysilicon film, and the density (duty ratio) of the nanoparticles on the silicon film surface is 0.2 after the ethanol is volatilized, and its particle layer is on the silicon surface. looks like figure 2 shown.

Embodiment 2

[0027] The particles of the silver nano-core-shell structure grown by chemical method, the diameter of the selected silver nano-core-shell structure is 400nm, and the thickness of the silver shell layer is about 50nm. Disperse it in ethanol, on the surface of the grown polysilicon film by coating the silver nanoparticle solution, the density (duty ratio) of the nanoparticle on the silicon film surface after ethanol is volatilized is 0.8, and the morphology of its particle layer on the silicon surface Such as image 3 shown.

[0028] refer to Figure 4 , compared with the absorption spectrum of the silicon film without depositing the metal nano-core-shell, the film absorption after the deposition of the metal nano-core-shell in Example 1 and Example 2 has been greatly improved, especially when the light absorption of polysilicon is relatively high. In the weak long-wavelength region, the improvement of light absorption is more significant.

[0029] refer to Figure 5 , comp...

Embodiment 3

[0031] The particles of the silver nano-core-shell structure grown by chemical method, the diameter of the selected silver nano-core-shell structure is 300nm, and the thickness of the silver shell layer is about 50nm. Its SEM photos are as Figure 6 As shown, it is dispersed in ethanol, and the silver nanoparticle solution is coated on the surface of the grown polysilicon film, and the density (duty ratio) of the nanoparticles on the silicon film surface is 0.2 after the ethanol is volatilized, and its particle layer is on the silicon surface. looks like Figure 7 shown.

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Abstract

The invention discloses a method for improving the light absorption of solar thin-film cell material silicon. The method adopted is that metallic sliver nano core-shell structure particles are deposited on the surface of a silicon thin film in a solar cell. According to the invention, the metallic silver nano core-shell particles are deposited on the surface of the silicon thin film of the cell through methods of self-assembling, spraying and the like. The method provided by the invention is simple, easy to implement, and compatible with the growth process of the solar thin-film cell; and the light absorption of the thin film is improved through a strong scattering effect of the surface plasmon resonance nano particles, and strengthening of light absorption in a broadband spectrum can be realized through adjusting the resonance band. The method disclosed by the invention can be applied to the field of inorganic or organic solar cells such as silicon and the like.

Description

technical field [0001] The invention belongs to the field of solar photovoltaics, in particular to the field of silicon thin-film photovoltaic devices, in particular to a method for improving the light absorption of silicon thin-film solar cell materials. Background technique [0002] Solar energy is the cleanest renewable energy source. At present, countries all over the world put solar photovoltaic power generation in the primary position of renewable energy utilization, and it has become an effective way to solve the current increasingly serious energy crisis and environmental pollution problems. In the market share of solar cells, the first generation of crystalline silicon cells has always occupied a dominant position. However, the cost of crystalline silicon cells remains high, especially the shortage of crystalline silicon raw materials limits its development to a certain extent. This brings an opportunity to the development of the second generation of thin film sola...

Claims

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Application Information

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IPC IPC(8): H01L31/18H01L31/0216
CPCY02P70/50
Inventor 程培红
Owner NINGBO UNIVERSITY OF TECHNOLOGY