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Application of flexible substrates and composite layers in solar cells, and solar cells

A technology of solar cells and flexible substrates, applied in circuits, photovoltaic power generation, electrical components, etc.

Active Publication Date: 2016-11-09
IND TECH RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In other words, doping sodium ions into the CIGS photoelectric conversion layer requires additional steps

Method used

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  • Application of flexible substrates and composite layers in solar cells, and solar cells
  • Application of flexible substrates and composite layers in solar cells, and solar cells
  • Application of flexible substrates and composite layers in solar cells, and solar cells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1 (synthesis of polyimide solution)

[0033] Get 20.42g of diamine (0.102mol) shown in formula 2 and stir and dissolve it in 201.67g of dimethylacetamide (DMAc) at room temperature, then add dianhydride (0.102mol) shown in 30g of formula 7 to diamine solution. After all the dianhydride was added, it was stirred at room temperature for 8 hours to obtain a golden yellow viscous solution of polyimide. Finally, 84.04 g of DMAc was added to adjust its solid content to 15 wt%, and a polyimide solution with a viscosity of 32300 cps was obtained.

Embodiment 2

[0034] Embodiment 2 (flexible substrate)

[0035] Take 30g of the polyimide solution (15wt%) of Example 1 and 9.64g of sodium-containing silica solution (20wt%) (the Snowtex-O particle size purchased from Nissan chemical is between about 10nm and 15nm) and stir after mixing, After it is uniformly dispersed, it is formed into a film on a commercially available stainless steel plate (SUS304, conforming to the specification of stainless 1.4301, with a thickness of 100 μm and a surface roughness Ra>20nm) by spin coating, and baked at about 350°C to obtain The composite layer is on a stainless steel substrate. The composite layer has a thickness of 10 μm and has 30.84 wt% sodium-containing silica, while the weight ratio of silica to sodium ions is 100:0.17. The thermogravimetric analysis shows that the thermal cracking temperature of the composite layer is 581.68° C., which is higher than the selenization temperature (550° C.) of the CIGS photoelectric conversion layer. Then, the...

Embodiment 3

[0036] Embodiment 3 (synthesis of polyimide solution)

[0037] Get 11.02g of diamine (0.102mol) shown in formula 1 and dissolve it in 164.08g of dimethylacetamide (DMAc) at room temperature, then add dianhydride (0.102mol) shown in 30g of formula 8 into diamine solution. After all the dianhydride was added, it was stirred at room temperature for 8 hours to obtain a black viscous solution of polyimide. Finally, 68.37 g of DMAc was added to adjust the solid content to 15 wt%, to obtain a polyimide solution with a viscosity of 41000 cps.

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PUM

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Abstract

The invention provides a flexible substrate, including: a metal substrate; and a composite layer on the metal substrate. The composite layer includes polyimide and sodium-containing silicon dioxide mixed with each other, and the weight ratio of polyimide to sodium-containing silicon dioxide is about 6:4 to 9:1. The weight ratio of silicon dioxide to sodium ions in the sodium-containing silica is between 100:0.01 and 100:2.

Description

【Technical field】 [0001] The present invention relates to flexible substrates, and more particularly to their use in solar cells. 【Background technique】 [0002] In thin-film solar cells, copper indium gallium diselenide (CIGS) belongs to compound semiconductors. Copper indium gallium selenide belongs to the form of polycrystalline thin film, and its crystal structure is different from the homogeneous pn junction of silicon crystal, but belongs to the complex heterojunction system. Copper indium gallium selenide, a group III and five compound semiconductor material, has a wide range of light absorption frequencies, and its stability is better than other thin film solar cells. In terms of conversion efficiency, copper indium gallium selenide solar cells are also higher than other thin-film solar cells under standard environmental tests, which is comparable to the best conversion efficiency of monocrystalline silicon solar cells. [0003] If the CIGS solar cell uses stainles...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/0224H01L31/0392
CPCH01L31/022425H01L31/03928Y02E10/541Y10T428/24355Y10T428/256Y10T428/265Y10T428/266
Inventor 林志成吕奇明
Owner IND TECH RES INST