Photovoltaic Performance of Crystalline Silicon Recovered from Solar Cell Using Various Chemical Concentrations in a Multi-Stage Process

Noh, Maengseok; Lee, Jun-Kyu; Ahn, Young-Soo; Yeo, Jeong-Gu; Lee, Jin-Seok; Kang, Gi‐Hwan; Cho, Churl-Hee

doi:10.3740/mrsk.2019.29.11.697

Cited by 2 publications

(1 citation statement)

References 20 publications

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“…태양광 모듈은 유리, EVA, 태양전지, 백시트, 구리 리본으로 구성되어 있고 테두리는 알루미늄 프레임으로 되 어 있으며, 모듈 후면에는 정션박스가 부착되어 있다. 정션박스와 프레임은 해체 장비를 통해 쉽게 분리가 가능 하나 이를 제외한 유리, EVA, 태양전지, 백시트, 구리 리본을 재활용하기 위한 분리 및 회수 과정은 쉽지 않아 이를 해결하기 위해 태양광 모듈 내 구성 재료를 회수하기 위한 공정 연구가 활발히 진행되고 있다 [4][5][6][7][8][9] . 태양광 모듈의 재활용 방법은 대표적으로 화학적 방법, 열적 방법, 물리적 방법으로 나누어진다 [10][11][12][13][14][15]…”

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Silicon Recovery from Solar Module Waste by a Physical Method

Yoon

Ahn

Kang

et al. 2022

J Korean Solar Energy

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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 TiO 2 peak, and ICP-MS analysis was performed to confirm the purity of the recovered Si, which was found to be of 3N grade.

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Silicon Recovery from Solar Module Waste by a Physical Method

Yoon

Ahn

Kang

et al. 2022

J Korean Solar Energy

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SiC Powder Manufacturing through Silicon Recovery from Waste Si Solar Cells

Min

Chang

2021

kses

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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 NH 4 HF 2 , H 2 O 2 , and H 2 SO 4 . 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.

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Photovoltaic Performance of Crystalline Silicon Recovered from Solar Cell Using Various Chemical Concentrations in a Multi-Stage Process

Cited by 2 publications

References 20 publications

Silicon Recovery from Solar Module Waste by a Physical Method

Silicon Recovery from Solar Module Waste by a Physical Method

SiC Powder Manufacturing through Silicon Recovery from Waste Si Solar Cells

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