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A method for improving the quality of copper-zinc-tin-sulfur thin films for solar cells

A solar cell, copper-zinc-tin-sulfur technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve problems such as efficiency reduction, poor film quality, and insufficient absorption, and achieve improved flatness, improved conversion efficiency, and high crystal quality Effect

Inactive Publication Date: 2016-08-24
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two main reasons: (1) The quality of the film is poor, and a large number of defects make the photogenerated carriers recombine, resulting in a decrease in efficiency; (2) The band gap does not form an effective "V" or "U" distribution in the thickness direction of the film. , insufficient absorption of light

Method used

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  • A method for improving the quality of copper-zinc-tin-sulfur thin films for solar cells
  • A method for improving the quality of copper-zinc-tin-sulfur thin films for solar cells
  • A method for improving the quality of copper-zinc-tin-sulfur thin films for solar cells

Examples

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Effect test

Embodiment 1

[0022] A method for improving the quality of a copper-zinc-tin-sulfur thin film used in a solar cell, comprising the following steps, selenization: at 500° C., using selenium powder to carry out selenization to the initial copper-zinc-tin-sulfur thin film, and the selenization time is 40min, Then cool to room temperature; vulcanization: vulcanize the selenized copper zinc tin sulfur film at 500°C under sulfur powder, the vulcanization time is 40min, and then cool to room temperature; secondary selenization: at 500°C, use selenium powder Secondary selenization is performed on the sulfided copper-zinc-tin-sulfur film, the selenization time is 20min, and then cooled to room temperature; Secondary vulcanization, the vulcanization time is 13min, and then cooled to room temperature.

[0023] In described selenization, secondary selenization process, add Sn powder in selenium powder, the mass ratio of the quality of Sn powder and selenium powder is 1: 1; In described vulcanization, s...

Embodiment 2

[0034] Example 2 is the same initial copper-zinc-tin-sulfur thin film used in example 1.

[0035] A method for improving the quality of a copper-zinc-tin-sulfur thin film used in a solar cell, comprising the steps of selenization: at 550° C., using selenium powder to selenize the initial copper-zinc-tin-sulfur thin film, and the selenization time is 20 minutes, Then cool to room temperature; vulcanization: vulcanize the selenized copper-zinc-tin-sulfur film at 550°C under sulfur powder, the vulcanization time is 40min, and then cool to room temperature; secondary selenization: at 550°C, use selenium powder Secondary selenization is performed on the sulfided copper-zinc-tin-sulfur film, the selenization time is 20min, and then cooled to room temperature; Secondary vulcanization, the vulcanization time is 5min, and then cooled to room temperature.

[0036] In described selenization, secondary selenization process, add Sn powder in solid selenium source, the mass ratio of the qu...

Embodiment 3

[0038] Example 3 is the same initial copper-zinc-tin-sulfur thin film used in example 1.

[0039] A method for improving the quality of a copper-zinc-tin-sulfur thin film used in a solar cell, comprising the following steps, selenization: at 525° C., using selenium powder to carry out selenization to the initial copper-zinc-tin-sulfur thin film, and the selenization time is 30min, Then cool to room temperature; vulcanization: vulcanize the selenized copper zinc tin sulfur film at 525°C under sulfur powder, the vulcanization time is 30min, and then cool to room temperature; secondary selenization: at 525°C, use selenium powder Secondary selenization is carried out on the copper-zinc-tin-sulfur thin film after sulfidation, and the selenization time is 15 minutes, and then cooled to room temperature; Secondary vulcanization, the vulcanization time is 10min, and then cooled to room temperature.

[0040] In described selenization, secondary selenization process, add Sn powder in s...

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Abstract

The invention relates to a method for improving quality of copper zinc tin sulfide thin film used for solar battery. The method includes the following steps: selenizing: selenizing copper zinc tin sulfide thin film using solid source of selenium (selenium powder or selenium block) in 500-550 oC, and cooling to room temperature, wherein selenium time is 20-40 minutes; vulcanizing: vulcanizing the copper zinc tin sulfide thin film using solid source of sulfur (sulfur powder or sulfur block) in 500-550 oC, and cooling to room temperature, wherein vulcanization time is 20-40 minutes; secondary selenizing: secondary selenizing the copper zinc tin sulfide thin film using solid source of selenium in 500-550 oC, and cooling to room temperature, wherein the selenium time is 10-20 minutes; secondary vulcanizing: secondary vulcanizing the copper zinc tin sulfide thin film using solid source of sulfur in 500-550 oC, and cooling to room temperature, wherein vulcanization time is 5-13 minutes.

Description

technical field [0001] The invention belongs to the technical field of solar thin-film batteries, and in particular relates to a method for improving the quality of copper-zinc-tin-sulfur thin films used in solar batteries. Background technique [0002] In the 21st century, "energy" has become the focus of competition among countries. All material activities of human beings are inseparable from the support of energy. Today, problems such as energy shortage, resource competition, and environmental pollution caused by excessive use of energy are threatening the survival and development of human beings. Exploring new energy is a way for human beings to seek sustainable development in the face of the coming energy dilemma. As a highly efficient energy source, solar energy has the characteristics of huge reserves, clean and pollution-free, and long-term use, making it the best choice for future energy sources. [0003] Solar cells are divided into silicon-based solar cells, mu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/18H01L21/02
CPCH01L21/02H01L31/0322Y02E10/541
Inventor 陈永生符凯亮张利伟
Owner ZHENGZHOU UNIV
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