폐 실리콘 태양전지의 실리콘 회수를 통한 SiC분말 제조
SiC Powder Manufacturing through Silicon Recovery from Waste Si Solar Cells
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초록
We recovered Si from the waste Si solar cell through a three-stage chemical process at room temperature and recycled the recovered Si to investigate the manufacture of SiC particles. Metal electrodes made of Ag and Al were removed using either nitric acid solution or hydrochloric acid solution. After etching the metal electrodes, the anti-reflection coatings containing SiNx and SiOx were removed by employing a mixed solution of NH4HF2, H2O2, and H2SO4. Small quantities of impurities remaining in the Si solar cells were subsequently removed through the application of potassium hydroxide to recover Si. Based on the measurements conducted through inductively coupled plasma atomic emission spectroscopy, the purity of the recovered Si was found to be 99.99% (4N), and no high energy-consuming steps were involved in the proposed chemical process. Furthermore, by incorporating the 4N purity-grade Si, we successfully obtained SiC particles for usage in structural ceramic materials. This suggests that the proposed chemical process can aid in recycling recovered Si.
Abstract
We recovered Si from the waste Si solar cell through a three-stage chemical process at room temperature and recycled the recovered Si to investigate the manufacture of SiC particles. Metal electrodes made of Ag and Al were removed using either nitric acid solution or hydrochloric acid solution. After etching the metal electrodes, the anti-reflection coatings containing SiNx and SiOx were removed by employing a mixed solution of NH4HF2, H2O2, and H2SO4. Small quantities of impurities remaining in the Si solar cells were subsequently removed through the application of potassium hydroxide to recover Si. Based on the measurements conducted through inductively coupled plasma atomic emission spectroscopy, the purity of the recovered Si was found to be 99.99% (4N), and no high energy-consuming steps were involved in the proposed chemical process. Furthermore, by incorporating the 4N purity-grade Si, we successfully obtained SiC particles for usage in structural ceramic materials. This suggests that the proposed chemical process can aid in recycling recovered Si.
참고문헌 (18)
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