폐 태양광 셀로부터 고순도 유가금속 회수 연구 = A study on the recovery of high purity valuable metals from waste photovoltaic cells

다국어 초록 (Multilingual Abstract)

It is entering a carbon neutral society due to the recent surge in gas, coal, and oil prices, and the increase in population density and energy. Accordingly, competitiveness in new and renewable energy is increasing, and among them, the equalized power generation cost is the cheapest, and the solar market is expanding. In Korea, technology for recycling photovoltaic cells is insufficient, and research is being conducted on it worldwide, but it is in an insufficient situation. Therefore, this study aims to establish and optimize recycling technology by recovering high purity valuable metals from photovoltaic cells. In this study, the reactivity of each component of the photovoltaic cell to the leachate was confirmed through thermodynamic data collection, the material behavior of the photovoltaic cell to the leachate was confirmed during the equilibrium reaction according to stoichiometry, and the recovery process was optimized. As a result, about 6N of Si could be recovered, and almost all of Ag and Al could be recovered.

목차 (Table of Contents)

• Ⅰ. 서론 1
• 1. 연구 배경 및 필요성 1
• Ⅱ. 이론적 배경 4
• 1. 태양광 산업의 동향 4
• 2. 태양 전지의 분류 및 특징 5
• 3. 태양광 모듈 및 결정질 실리콘 태양 전지의 구조 7
• 4. 태양광 폐 모듈 재활용 기술 동향 9
• 5. 습식 제련 10
• Ⅲ. 실험 재료 및 방법 12
• 1. 개요 12
• 2. 원료 분석 12
• 2.1. SEM-EDS 분석 13
• 2.2. XRD 분석 18
• 2.3. ICP 분석 19
• 3. 열역학 데이터 수집 21
• 3.1. 침출제에 따른 원료 성분의 열역학적 거동 22
• 3.1.1. Leachate + Si 23
• 3.1.2. Leachate + Ag 25
• 3.1.3. Leachate + Al 27
• 3.2. 침출제 및 원료 성분의 평형 상태에 따른 화학양론비 도출 29
• 4. 실험 장비 37
• Ⅳ. 실험 결과 및 고찰 39
• 1.1. HNO3 침출 39
• 1.2. NaOH 반응 46
• 1.3. 반사방지막 제거 51
• 2. 침출액으로부터 Ag 회수 57
• 3. 침출액으로부터 Al 회수 60
• Ⅴ. 결론 64
• 참고문헌 66