Silicon Recovery from Solar Module Waste by a Physical Method

Dae-Sik Yoon; Young-Soo Ahn; Gi-Hawn Kang; Hyo Sik Chang; Jin-Seok Lee

doi:10.7836/kses.2022.42.3.001

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2022 Vol.42, Issue 3 Next Page

Research Article

Silicon Recovery from Solar Module Waste by a Physical Method 물리적 방법에 의한 태양광 폐모듈로부터 실리콘 회수

30 June 2022. pp. 1-11

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Abstract

This paper describes the physical process used to recover silicon from a solar module, where the solar cell recovery rate (87.4 %) was determined under optimized process conditions. This physical recycling method requires a particle separation process because selective separation of the recovered materials is difficult, and the recovery rate and purity of the recovered materials can be low after the initial particle separation. In this study, the recovery rate was determined with respect to the crushing time and rotational speed of the cutter mill as well as the amplitude and separation time of the sieving machine, which were optimized to increase the Si recovery rate. In addition, an etching process was used to recover high-purity Si from the solar cells. To determine whether Ag and Al were removed from the recovered Si, XRD analysis was performed to confirm the measured Si peak and small TiO₂ peak, and ICP-MS analysis was performed to confirm the purity of the recovered Si, which was found to be of 3N grade.

Keywords

Photovoltaic module

Recycling

crushing

Solar cell

Silicon

키워드

태양광 모듈

재활용

분쇄

태양전지

실리콘

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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 : 42
No :3
Pages :1-11
Received Date : 2022-04-19
Revised Date : 2022-04-26
Accepted Date : 2022-04-26
DOI :https://doi.org/10.7836/kses.2022.42.3.001

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

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