Journal of Inorganic Materials ›› 2016, Vol. 31 ›› Issue (8): 785-790.DOI: 10.15541/jim20150554

• Orginal Article •     Next Articles

Effects of Te-Bi Glass Frit on Performances of Front Silver Contacts for Crystalline Silicon Solar Cells

FU Ming1, 2, CHENG Si-Guo1, 2, WANG Yue1, 2, ZHOU Hong1, 2, FAN Lin3   

  1. (1. School Of Optics and Electronics Information HUST, Wuhan 430074, China; 2. Ministry of Education Key Laboratory of Information Materials(B), wuhan 430074; 3. Optoelectronics Technology Co., Ltd. YL, Wuhan 430206, China)
  • Received:2015-11-11 Revised:2015-12-30 Online:2016-08-20 Published:2016-07-20

Abstract:

Front silver paste is a key material for metalization of crystalline silicon solar cells. Environmental-friendly paste is one of the main development direction for the front silver contacts. The effects of Te-Bi glass frits with different formulations and components on the performances of front silver contacts were studied by orthogonal experimental method. The heating characteristics of Te-Bi glass frit and front silver pastes were analyzed by TGA-DSC. Size and distribution of the silver microcrystalline on Ag-Si interface were observed by SEM. The influence of glass on the performances of the front silver contacts was analyzed by using tunneling current model. The results show that the transition temperature (Tg) of Z7 glass frit composed of 45wt% TeO2 and 36wt% Bi2O3 is 379.07℃. The endothermic reaction of corresponding paste occurs at 612.8℃ with 0.16% weight loss occurring at the same temperature. The efficiency of polycrystalline silicon solar cells using the corresponding front silver paste is 16.87%, and adhesion of the cell is 4.35 N.

Key words: crystalline silicon solar cells, lead-free glass frit, front silver contacts, cell performances