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Solar battery based on silicon nano material

A technology of solar cells and silicon nanometers, which is applied in the field of solar cells, can solve problems such as no solar cell research, and achieve the effects of improving photoelectric conversion efficiency, wide electrochemical window, and improving conversion efficiency

Inactive Publication Date: 2011-08-17
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the field of solar cells, there has been no research on ionic liquids in silicon nanostructured solar cells so far.

Method used

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  • Solar battery based on silicon nano material
  • Solar battery based on silicon nano material
  • Solar battery based on silicon nano material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] see Figure 13 Shown, a kind of solar cell based on silicon nanostructure comprises n-type silicon chip 6, and described silicon chip is provided with conductive glass (conductive glass comprises transparent glass 1 and conductive film layer 2), between conductive glass and silicon chip It is surrounded by an insulating sealing layer 3, forming an electrolyte chamber between the conductive glass and the silicon wafer, that is, the hole transport layer 4, and the electrolyte chamber is provided with an ionic liquid electrolyte; the back of the silicon wafer is provided with an extraction electrode 7, forming an ohmic electrode structure . Silicon nanostructures 5 are provided on the silicon wafer 6 .

[0060] The preparation method is as follows: first, the n-type silicon wafer is etched in a mixed solution of 0.02M silver nitrate and 5M hydrofluoric acid at room temperature, and silicon nanowires are prepared by etching on the n-type silicon substrate; Immerse the sil...

Embodiment 2

[0074] First, the n-type silicon wafer is immersed in a mixture of 5% hydrofluoric acid and 10mM sodium dodecylsulfonate at room temperature for electrochemical etching. The etching condition is a bias voltage of 5V, backlighting, and a current density of 10mAcm. -2 , the etching time is 30 minutes, and the porous silicon array can be prepared on the silicon substrate, and then the silicon wafer is soaked in 10% potassium hydroxide (KOH) to remove the microporous layer on the surface; then the silicon wafer is immersed in 5M hydrofluoric acid Acid solution makes the surface to form Si:H bond; Put into the saturated chlorobenzene solution of phosphorus pentachloride, the tetrahydrofuran solution (1M) of methylmagnesium chloride and carry out treatment to make its surface methylation; Deposit 5-10nm platinum particles on the surface of porous silicon and indium tin oxide films; then use high vacuum thermal evaporation to deposit Al films on the bottom of the silicon substrate to ...

Embodiment 3

[0080] First, immerse the n-type silicon wafer in a mixed solution of 0.02M silver nitrate and 5M hydrofluoric acid to etch at room temperature, and etch on the n-type silicon substrate to prepare silicon nanowires; then soak the silicon wafer in concentrated nitric acid solution for at least one hour To remove elemental silver; then immerse the silicon wafer in a 5M hydrofluoric acid solution to form Si:H bonds on the surface; deposit 5-10nm platinum particles on the surface of the silicon nanowire array and the surface of the indium tin oxide film by thermal decomposition, respectively, Then use high vacuum thermal evaporation method to deposit Al film on the bottom surface of silicon substrate to form ohmic contact electrode; and Mix evenly at a volume ratio of 2:1 and add redox electron pairs of iodine, drop a few drops on the silicon nanowires, and finally cover the ionic liquid with an indium tin oxide conductive glass and package it to obtain an ionic liquid-based Si...

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Abstract

The invention discloses a solar battery based on a silicon nano material. The solar battery based on the silicon nano material comprises a silicon wafer on which conductive glass is arranged; an insulation sealing layer is encircled between the conductive glass and the silicon wafer; an electrolyte chamber is formed between the conductive glass and the silicon wafer; ion liquid electrolyte is arranged in the electrolyte chamber; and lead-out electrodes are arranged on the backs of the conductive glass and the silicon wafer so as to form an ohm electrode structure. The solar battery has the characteristics of high thermal stability and chemical stability; a thinner silicon wafer can be used as a silicon electrode, the requirement for purity of the silicon is relatively low and the encapsulation requirement on the battery is reduced greatly at the same time. The invention also provides a low-cost, high-efficiency and stable technology for preparing the solar battery, which has a positive practical significance.

Description

technical field [0001] The invention relates to a solar cell, in particular to a solar cell based on a silicon nanostructure, and belongs to the technical field of solar energy. Background technique [0002] With the rapid development of the economy, the global energy crisis and environmental pollution caused by the use of traditional petrochemical energy have become increasingly prominent, and have become key factors restricting the sustainable and harmonious development of society. The development of renewable energy is one of the effective ways to solve the above problems. Looking at other types of new energy, such as wind energy, biomass energy, solar energy, etc., solar energy has the best utilization prospect and the greatest potential because of its abundant reserves, clean use and pollution-free use. [0003] Solar cells are photovoltaic devices that directly convert solar energy into electrical energy, and are one of the most effective ways to utilize solar energy....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/04H01L31/0352H01G9/20H01M14/00
CPCY02E10/50
Inventor 孙宝全雷晓飞严锋申小娟赵杰
Owner SUZHOU UNIV
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