化学镀制备银包覆玻璃粉及其电学性能.pdf

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第20卷第1期
粉末治金材料科学与工程
2015年2月
Vol 20 No
Materials Science and Engineering of Powder Metallurgy
Feb.2015
化学镀制备银包覆玻璃粉及其电学性能
杨超,甘卫平,周健,黎应芬,鲁志强,戈田田
(中南大学材料科学与工程学院,长沙>410083)
摘要:采用乙二醇还原硝酸银工艺对玻璃粉进行活化处理,再以银氨溶液为前驱体、葡萄糖为还原剂,用化学
镀法在玻璃粉表面镀覆纳米银层,得到Ag/玻璃复合粉末。利用X射线衍射、扫描电镜及能谱分析等方法研究
Ag玻璃复合粉末的结构与成分,并在溶液pH值约为13.0的条件下,分别研究乙二醇活化与镀液中的硝酸银浓
度c(AgNO3)对银镀层的影响。结果表明,在活化基础上,当c(AgNO3)为0.057molL,葡萄糖浓度为0.088molL
时,得到均匀的纳米银镀层。分别采用普通玻璃粉与改性玻璃粉配制正面银浆,进一步制备多晶硅太阳能电池片
与普通玻璃粉相比,用镀锒玻璃粉配制的正面银浆可以致密栅线,电池的光电转换效率从17.45%提高到17.51%。
关键词:玻璃粉;化学镀银;硝酸银浓度;太阳电池
中图分类号:TB34
文献标识码:A
文章编号:1673-0224(2015)1-99-07
Preparation and electricity performance of silver coating glass frit
by electroless silver plating
YANG Chao, GAN Wei-ping, ZHOU Jian, LI Ying-fen, LU Zhi-qiang, GE Tian-tian
(School of Materials Science and Engineering, Central South University, Changsha 410083, China)
Abstract: Glass frits were activated through ethylene glycol reducing Agno nano-silver coated glass frits composite
powders were prepared by electroless plating method using glucose as reducing reagent and silver-ammonia solution as
precurso. The microstructures and phase composition of glass frits coated silver were characterized by SEM, EDS an
XRD. The effects of ethylene glycol activating and concentration of ANO on silver coating were studied when PH of
the solution is 13. 0. The results show that, nano-silver coating is uniform when the concentration of silver nitrate and
glucose are 0.057 mol/L and 0.088 mol/L. The polycrystalline silicon solar cells were prepared using ordinarily and
modified glass frits, respectively. Compared with silver slurry made up by ordinarily glass frits, the face side silver slurry
made up by modified glass frits can densified electrode grids and the translational ratio of sunlight to electricity increase
from17.45%to17.51%
Key words: glass frits: electroless silver plating; concentration of Agno solar cell
正面银浆是制备太阳能电池的关键材料,主要由涂镀一层纳米厚度的银镀层也可促进银在高温下的扩
银粉、玻璃粉、有机载体和少量掺杂剂组成。研究表散,增加银溶入玻璃料中的含量,有利于欧姆接触的
明:在电极的烧结过程中,玻璃粉蚀刻硅片减反射层、形成,从而提高电池的光电转换效率?。材料表面涂
并促进银粉的溶解,以及增加银电极栅线的粘接力,镀工艺有溅射法、浸渍法、物理气相沉积法、化学气
其活性与成分的改善可以改变硅片与电极栅线的接触相沉积法、电镀法、化学镀法等列,其中化学镀因设
结构,从而极大地减小太阳能电池的接触电阻。鉴备简单、操作方便、可控性强、适应性广(可对无机材
于纳米材料对烧结的活化作用,CHE等在正面银浆中料、高分子材料、金属材料等进行表面镀覆)而倍受关
加入纳米银粉,结果表明纳米银可促进电极的烧结,注,MA等の运用化学镀合成了核壳结构的Ag-PS(聚
有利于提高电极表面银厚膜的致密性?。玻璃粉表面苯乙烯球),JEE等用化学镀法制备了银包覆玻璃颗
基金项目:湖南省科技重大专项(2009FJ102-3)
收稿日期:2014-03-17;修订日期:2014-05-08
通讯作者:甘卫平,教授。电话:13707311733;E-mai:gwp@mail.csu,edu.cn