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Cadmium telluride solar cell with suede back contact layer and preparation method of cadmium telluride solar cell

A solar cell and back-contact technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of preparation process load, complicated process steps, difficult control, etc., to improve (VOC, improve conversion efficiency, increase bandgap width Effect

Inactive Publication Date: 2018-02-27
CNBM CHENGDU OPTOELECTRONICS MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most commonly used surface chemical treatments are BM corrosion and NP corrosion, and the most used back contact layer material is ZnTe / ZnTe:Cu composite back contact layer. The preparation process load of this composite back contact layer is difficult to control and the process steps are complicated.

Method used

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  • Cadmium telluride solar cell with suede back contact layer and preparation method of cadmium telluride solar cell
  • Cadmium telluride solar cell with suede back contact layer and preparation method of cadmium telluride solar cell
  • Cadmium telluride solar cell with suede back contact layer and preparation method of cadmium telluride solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] like figure 1 As shown, a cadmium telluride thin-film solar cell with a textured back contact layer is sequentially provided with a silicon dioxide substrate layer, a Mo back electrode layer, a MoSe 2 : Cu back contact layer, CdTe light absorbing layer, wherein the thickness of the substrate layer is 50nm, the thickness of the back electrode layer is 20nm, the thickness of the back contact layer is 10nm, and the thickness of the light absorbing layer is 400nm.

[0026] The preparation method of the above-mentioned cadmium telluride thin-film solar cell comprises the following steps:

[0027] (1) Use silicon dioxide as the substrate material, the thickness of the conductive film is 50nm, cut it into a size of 2.5cm×4cm, use ultrasonic cleaning method, clean with absolute ethanol solution, acetone solution, and distilled water successively, 60°C Store for later use after drying.

[0028] (2) A molybdenum back electrode layer is deposited on the substrate layer by magnet...

Embodiment 2

[0032] like figure 1 As shown, a cadmium telluride thin-film solar cell with a textured back contact layer is sequentially provided with a silicon dioxide bottom layer, a Mo back electrode layer, a MoSe 2 : Cu back contact layer, CdTe light absorbing layer, wherein the thickness of the substrate layer is 100nm, the thickness of the back electrode layer is 50nm, the thickness of the back contact layer is 20nm, and the thickness of the light absorbing layer is 500nm.

[0033] The preparation method of the above-mentioned cadmium telluride thin-film solar cell comprises the following steps:

[0034] (1) Use silicon dioxide as the substrate material, the thickness of the conductive film is 100nm, cut it into a size of 2.5cm×4cm, use ultrasonic cleaning method, clean with absolute ethanol solution, acetone solution, and distilled water successively, 60°C Store for later use after drying.

[0035] (2) A molybdenum back electrode layer is deposited on the substrate layer by magnetr...

Embodiment 3

[0039] like figure 1 As shown, a cadmium telluride thin-film solar cell with a textured back contact layer is sequentially provided with a substrate layer, a Mo back electrode layer, a MoSe 2 : Cu back contact layer, CdTe light absorbing layer, wherein the thickness of the substrate layer is 200nm, the thickness of the back electrode layer is 75nm, the thickness of the back contact layer is 30nm, and the thickness of the light absorbing layer is 600nm.

[0040] The preparation method of the above-mentioned cadmium telluride thin-film solar cell comprises the following steps:

[0041](1) Use silicon dioxide as the substrate material, the thickness of the conductive film is 200nm, cut it into a size of 2.5cm×4cm, use ultrasonic cleaning method, clean with absolute ethanol solution, acetone solution, and distilled water successively, at 60°C Store for later use after drying.

[0042] (2) A molybdenum back electrode layer is deposited on the substrate layer by magnetron sputteri...

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Abstract

The invention discloses a cadmium telluride solar cell with a suede back contact layer and a preparation method of the cadmium telluride solar cell. The solar cell comprises a substrate layer, a backelectrode layer, the back contact layer and a light absorption layer from bottom to top in sequence, wherein the back contact layer is made of a copper-selenium-molybdenum compound (MoSe2:Cu); the back electrode layer is made of metal molybdenum; the light absorption layer is a cadmium telluride thin film. The solar cell uses MoSe2:Cu as the material of the back contact layer; Se can adjust a bandgap by diffusing to the light absorption layer while the back contact layer and the light absorption layer are in good ohmic contact; besides, suedo reflects sunlight which is not absorbed through acid etching, so that the light absorption layer fully utilizes the sunlight, and the photoelectric conversion efficiency of the solar cell is improved.

Description

technical field [0001] The invention relates to the technical field of cadmium telluride thin-film solar cells, in particular to a cadmium telluride solar cell with a textured back contact layer and a preparation method thereof. Background technique [0002] With the increasing scarcity of traditional energy, the development and utilization of new energy has become an important means to solve the energy crisis. Among many new energy sources, including solar energy, ocean energy, geothermal energy, tidal energy, biomass energy, etc., solar energy has become the leader of new energy due to its advantages of cleanliness, pollution-free and abundant reserves. After years of development, the second-generation compound thin-film batteries have attracted the attention of many research institutions and companies, and some of them have been industrialized. As a branch of compound thin-film solar cells, CdTe batteries have great research value and commercial value, and have attracted...

Claims

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Application Information

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IPC IPC(8): H01L31/0216H01L31/0224H01L31/0296H01L31/18
CPCH01L31/02168H01L31/022441H01L31/02966H01L31/1876Y02E10/50Y02P70/50
Inventor 彭寿马立云潘锦功殷新建赵雷
Owner CNBM CHENGDU OPTOELECTRONICS MATERIAL
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