Te-Bi玻璃对晶体硅太阳能电池正银电极性能的影响

doi:10.15541/jim20150554

无机材料学报 ›› 2016, Vol. 31 ›› Issue (8): 785-790.DOI: 10.15541/jim20150554

• • 下一篇

Te-Bi玻璃对晶体硅太阳能电池正银电极性能的影响

付明^{1, 2}, 程思国^{1, 2}, 王玥^{1, 2}, 周洪^{1, 2}, 范琳³

(1. 华中科技大学光学与电子信息学院, 武汉 430074; 2. 华中科技大学教育部信息功能材料重点实验室(B类), 武汉 430074; 3. 武汉优乐光电科技有限公司, 武汉 430206)

收稿日期:2015-11-11 修回日期:2015-12-30 出版日期:2016-08-20 网络出版日期:2016-07-20
基金资助:
武汉市科技局应用基础研究项目(2014010101010022)

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

FU Ming^{1, 2}, CHENG Si-Guo^{1, 2}, WANG Yue^{1, 2}, ZHOU Hong^{1, 2}, FAN Lin³

(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 Published:2016-08-20 Online:2016-07-20

摘要/Abstract

摘要：

正银浆料是晶体硅太阳能电池金属化的关键材料, 环保型浆料是正银电极的主要发展方向之一。通过正交实验方法, 研究了不同配方和组分的Te-Bi玻璃对正银电极性能的影响。用TGA-DSC分析了Te-Bi玻璃和正银浆料的热处理特性, 用SEM分析了Ag-Si界面处银微晶的分布和大小, 利用隧道电流模型分析了玻璃对正银电极性能的影响规律。结果表明: TeO₂含量45wt%, Bi₂O₃含量36wt%的Z7玻璃, 其T_g为379.07℃, 对应的正银浆料在612.8℃出现吸热反应, 同时发生失重(-0.16%), 制作的多晶硅电池效率达到16.87%, 电极的附着力达到4.35 N。

关键词: 晶体硅太阳能电池, 无铅玻璃, 正银电极, 电池性能

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

付明, 程思国, 王玥, 周洪, 范琳. Te-Bi玻璃对晶体硅太阳能电池正银电极性能的影响[J]. 无机材料学报, 2016, 31(8): 785-790.

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.

图/表 10

表1 正交实验水平与因素

Table 1 Orthogonal experimental levels and factors

No.	1	2	3	4	5
No.	TeO₂	Bi₂O₃	SiO₂	L₂O	MO
1	40	28	0	0	3
2	45	32	2	2	6
3	50	36	4	4	9
4	55	40	6	6	12

表2 正交试验玻璃配方表

Table 2 Glass recipe table of orthogonal experiment

No.	Glass recipe/wt%
No.	TeO₂	Bi₂O₃	SiO₂	L₂O	MO
Z1	40	28	0	0	3
Z2	40	32	2	2	6
Z3	40	36	4	4	9
Z4	40	40	6	6	12
Z5	45	28	4	6	6
Z6	45	32	6	4	3
Z7	45	36	0	2	12
Z8	45	40	2	0	9
Z9	50	28	6	2	9
Z10	50	32	4	0	12
Z11	50	36	2	6	3
Z12	50	40	0	4	6
Z13	55	28	2	4	12
Z14	55	32	0	6	9
Z15	55	36	6	0	6
Z16	55	40	4	2	3

表3 正交试验电池片性能

Table 3 Cell performances of orthogonal experiments

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

图1 正银电极结构示意图

Fig. 1 Structure of the front-contact silver electrode

图2 正银电流传导模型图

Fig. 2 Models of current transport in front contact silver electrode

图3 Z3、Z7、Z10和Z16玻璃的差热曲线

Fig. 3 DTA curves of lead-free glass frits of Z3, Z7, Z10 and Z16

图4 Z3、Z7、Z10和Z16正银浆差热曲线

Fig. 4 DTA curves of front-contact silver paste of Z3, Z7, Z10 and Z16

图5 玻璃样品的XRD图谱

Fig. 5 XRD patterns of the glass frit

图6 正银栅线电极银微晶的大小和分布

Fig. 6 Size and distribution of Ag crystallites in front-contact silver grid electrode

图7 Z7和Z16正银电极的断面SEM照片

Fig.7 Cross-sectional SEM images of front contacts of Z7 and Z16

参考文献 10

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Te-Bi玻璃对晶体硅太阳能电池正银电极性能的影响

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

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