SiC Powder Manufacturing through Silicon Recovery from Waste Si Solar Cells

Ga Min Kim; Hyo Sik Chang

doi:10.7836/kses.2021.41.4.173

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2021 Vol.41, Issue 4 Preview Page Next Page

Research Article

SiC Powder Manufacturing through Silicon Recovery from Waste Si Solar Cells 폐 실리콘 태양전지의 실리콘 회수를 통한 SiC분말 제조

30 August 2021. pp. 173-180

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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.

Keywords

Waste solar cell

Chemical process

Recovery

Silicon carbide

키워드

폐 태양전지

화학공정

회수

탄화규소

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Information

Publisher :Korean Solar Energy Society
Publisher(Ko) :한국태양에너지학회
Journal Title :Journal of the Korean Solar Energy Society
Journal Title(Ko) :한국태양에너지학회 논문집
Volume : 41
No :4
Pages :173-180
Received Date : 2021-06-21
Revised Date : 2021-08-12
Accepted Date : 2021-08-18
DOI :https://doi.org/10.7836/kses.2021.41.4.173

Journal of the Korean Solar Energy Society ISSN:1598-6411(Print) 2508-3562(Online) 한국태양에너지학회 논문집

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