2017-Sustainable Industrial Processing Summit
SIPS 2017 Volume 1. Barrios Intl. Symp. / Non-ferrous Smelting & Hydro/Electrochemical Processing
| Editors: | Kongoli F, Palacios M, Buenger T, Meza JH, Delgado E, Joudrie MC, Gonzales T, Treand N |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2017 |
| Pages: | 264 pages |
| ISBN: | 978-1-987820-61-4 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
CD shopping page
Recovery of Useful Non-Ferrous Elements in Crystalline Silicon Sollar Cells by Chemical Etching
Yoshiei Kato1; Md. Azhar Uddin1; Teruaki Matsubara2; Kei Takami2;1OKAYAMA UNIVERSITY, Okayama, Japan; 2, , ;
Type of Paper: Regular
Id Paper: 178
Topic: 6
Abstract:
A recycling of waste solar modules has been increased attention with development of the photovoltaic market in the world. In this study, two kinds of acid treatments were carried out to examine the optimal recovery condition of silicon and the other metal elements in waste crystalline silicon solar cells. Mixed solution of hydrofluoric acid (HF) and nitric acid (HNO3) was used to maximize the remainder of etched silicon wafer, whereas that of hydrochloric acid (HCl) and HNO3 to remove metallic elements such as silver (Ag), copper (Cu), tin (Sn), aluminum (Al) from crushed and granular mass of waste crystalline cells and obtain the maximum purified silicon particles. The effect of HF/HNO3 concentration on etching rates of several components such as Ag, Al, anti-reflection film made of silicon nitride (AR) and Si in the solar cells was made clear that Al, AR and Si etching rates peaked at the HF mole fraction of about 0.8 and depended on HF more deeply than HNO3.On the other hand, when the mixed solution of HCl and HNO3, Cu etching rate was less than the other elements such as Ag, Al, Sn etc.
Keywords:
Chemical; Non-Ferrous; Recovery; Sustainability; Waste;References:
[1] E. K. Radziemska, P.Ostrowski: Chemical treatment of crystalline silicon solar cells as a method of recovering pure silicon from photovoltaic modules, Renewable Energy, 35(2010), 1751-1759[2] M. Hino: Recycleing technology of solar cells, Kagaku-sohchi, 319 (2010), 1776-1774