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

doi:10.15541/jim20150554

Abstract

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 (T_g) 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

FU Ming, CHENG Si-Guo, WANG Yue, ZHOU Hong, FAN Lin. Effects of Te-Bi Glass Frit on Performances of Front Silver Contacts for Crystalline Silicon Solar Cells[J]. Journal of Inorganic Materials, 2016, 31(8): 785-790.

Figures/Tables 10

References 10

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No	η/%	V_oc/V	I_sc/A	R_s/mΩ	Adhesion/N
Z	17.07	0.622	1.004	68.26	4.04
Z1	7.13	0.617	0.847	434.12	2.35
Z2	12.85	0.620	0.958	110.97	2.60
Z3	13.98	0.615	1.049	106.51	4.40
Z4	12.01	0.619	1.059	151.55	4.15
Z5	11.12	0.612	1.009	171.31	1.85
Z6	5.61	0.614	0.996	580.61	1.40
Z7	16.87	0.621	1.009	71.14	4.35
Z8	13.21	0.621	0.959	120.16	4.60
Z9	10.50	0.616	0.998	180.06	1.70
Z10	13.15	0.621	1.039	181.08	2.75
Z11	11.75	0.619	0.998	148.39	1.25
Z12	13.98	0.616	1.087	86.99	3.20
Z13	11.50	0.611	0.974	229.12	2.30
Z14	10.35	0.619	0.986	206.66	1.95
Z15	8.78	0.617	0.918	564, 57	0.35
Z16	7.70	0.619	0.977	598.99	1.50

No	η/%	V_oc/V	I_sc/A	R_s/mΩ	Adhesion/N
Z	17.07	0.622	1.004	68.26	4.04
Z1	7.13	0.617	0.847	434.12	2.35
Z2	12.85	0.620	0.958	110.97	2.60
Z3	13.98	0.615	1.049	106.51	4.40
Z4	12.01	0.619	1.059	151.55	4.15
Z5	11.12	0.612	1.009	171.31	1.85
Z6	5.61	0.614	0.996	580.61	1.40
Z7	16.87	0.621	1.009	71.14	4.35
Z8	13.21	0.621	0.959	120.16	4.60
Z9	10.50	0.616	0.998	180.06	1.70
Z10	13.15	0.621	1.039	181.08	2.75
Z11	11.75	0.619	0.998	148.39	1.25
Z12	13.98	0.616	1.087	86.99	3.20
Z13	11.50	0.611	0.974	229.12	2.30
Z14	10.35	0.619	0.986	206.66	1.95
Z15	8.78	0.617	0.918	564, 57	0.35
Z16	7.70	0.619	0.977	598.99	1.50