太阳能电池正极浆料用超细Cu/Ag核壳金属粉制备  

Preparation of Ultra-fine Silver-Copper Core-shell Powders for Solar Cell Grid Electrode

作　　者：黄惠[1] 周继禹 付仁春[1] 郭忠诚[1] 

机构地区：[1]昆明理工大学,云南昆明650093 [2]第七零五研究所昆明分部,云南昆明650118

出　　处：《稀有金属材料与工程》2014年第2期490-494,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50974065;51004057);云南省自然科学基金(2011FZ031);昆明理工大学分析测试基金(2010198)

摘　　要：反应体系中引入强还原剂抗坏血酸,通过反应条件抑制置换反应,使EDTA银络合溶液优先发生液相还原反应,制备了Cu/Ag核壳金属粉。采用XRD、SEM、EDS、TGA和激光粒度仪等分析手段对所得核壳金属粉的晶相组成、形貌、粒度分布及含量进行分析。结果表明:抗坏血酸还原法经过一次包覆后,在纳米级Cu粉的表面得到包覆完整的Ag层。本工艺得到Cu/30%Ag(质量分数)核壳粉末具有良好的抗氧化性和热稳定性。并将所得Cu/30%Ag核壳金属粉调制成太阳能电池用浆料,通过丝网印刷在硅片上并烧结,用四探针测试仪测得烧结膜的方阻为12.35 mΩ/□,可满足太阳能电池的电性能要求。Cu/Ag core-shell powders have been prepared by liquid phase reduction reaction using ascorbic acid as a reducing agent through inhibiting substitution reaction. The composition and the content for the pretreated and coated copper powder, the morphology and the particle size distribution of Cu/Ag core-shell powders, the composition of the coated-surface were characterized by XRD, SEM, EDS, TAG and laser particle analyzer, etc. The results show that a continuous silver film is formed on the surface of copper powder by coating for a time. The observed Cu/30%Ag （mass fraction） powder has a good oxidation resistance and thermal stability. The paste prepared with ready-made silver powder and Cu/30%Ag were printed on the silicon, and the square resistance of the sintered film tested by four-point probe is 12.35 mΩ/D, indicating the electrical property of the prepared Cu/Ag core-shell powders is qualified for solar cell

关 键 词：银包铜粉 抗坏血酸 太阳能电池 液相还原 抗氧化性 

分 类 号：TM914.4[电气工程—电力电子与电力传动] TF123[冶金工程—粉末冶金]