片状银粉对太阳能电池银浆料电性能影响研究  

Effects of flake silver powder on electrical properties of solar cells silver paste

作　　者：闫方存 滕媛[1,2,3,4] 严继康[1,2,3,4] 杜景红[1,2,3,4] 易建宏[1,2,3,4] 甘国友[1,2,3,4] 

机构地区：[1]昆明理工大学材料科学与工程学院,昆明650093 [2]稀贵及有色金属先进材料教育部重点实验室,昆明650093 [3]云南省新材料制备与加工重点实验室,昆明650093 [4]昆明市稀贵及有色金属先进材料重点实验室,昆明650093

出　　处：《功能材料与器件学报》2015年第4期31-35,共5页Journal of Functional Materials and Devices

基　　金：国家自然科学基金(51262017;51362017);稀贵金属综合利用新技术国家重点实验室开放课题(SKL-SPM-201502);云南省稀贵金属先进材料协同创新中心协同创新基金项目资助(14051708)

摘　　要：为提高太阳能电池银导电浆料的导电性能,降低银粉用量,本文采用丝网印刷方法,探究了银粉形貌、银粉含量、不同银粉级配对银浆导电性能的影响,并对银膜导电机理进行了讨论。实验发现,在片状银粉含量占银粉总含量的80%时,方阻由球形银粉的15.65mΩ/□降低到7.41mΩ/□;作为导电相的混合型银粉含量在73%时,银膜方阻降到最低6.59mΩ/□,导电性能得到有效提高。这是因为片状银粉烧结后呈线接触或面接触状态,改变了球形银粉间点接触的导电模式,能有效降低银膜的体电阻率。To improve the conductivity of silver paste used on solar cell and reduce the dosage of silver powders, screen printing method was accepted in this paper, and the influence of silver powders＇ morphology, concentration and grading on the silver paste＇s performance were studied, and the conductivity mechanism of silver film was discussed, The was found that： when flake silver powders＇ content was 80%, square resistance reduce from 15.65 mΩ/□ by spherical silver powders to 7.41 mΩ/□ ; As the conductive phase when the content of mixed silver powder＇ grading film reduce to 6.59mΩ/□, the conductive properties of the silver because the line contact or surface contact state is shown after flake the conductive mode of point contact of spherical silver powders, so resistivity of the silver film; was 73 % , square resistance of silver film was improved effectively. This is silver powder sintering, and changed it can effectively decrease the volume

关 键 词：导电浆料 片状银粉 方阻 导电模型 银粉级配 

分 类 号：TG335.58[金属学及工艺—金属压力加工]