接触电阻测量原理
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Core Scan 的基本原理与应用
Firing optimization
JA Solar Confidential, Internal Use Only 7
JA Solar (Yangzhou) Dept. R&D
TLM的基本原理与应用
① measure the resistance between different fingers with the help of the 4-point-probe ② measure the resistance between the tips on the finger (1 to 2, respectively 3 to 4) to make sure that the tips have good contact to the finger, additionally
百度文库
JA Solar Confidential, Internal Use Only
4
JA Solar (Yangzhou) Dept. R&D
Core Scan 的基本原理与应用
Typical signal for contact resistance
JA Solar Confidential, Internal Use Only
2
JA Solar (Yangzhou) Dept. R&D
接触电阻的定义
银浆的核心技术—— 降低接触电阻 SE的出发点—— 实现轻掺杂、低接触
JA Solar Confidential, Internal Use Only
3
JA Solar (Yangzhou) Dept. R&D
Core Scan 的基本原理与应用
JA Solar Confidential, Internal Use Only
8
JA Solar (Yangzhou) Dept. R&D
TLM的基本原理与应用
The resistance that was measured between two fingers consists of diverse parts: R measured = Rtip + Rc + d*Rsheet + Rc + Rtip = 2* Rtip + 2*Rc + d*Rsheet Rtip there is identical to the resistance between the 2 tips on the same finger and therefore can be eliminated. The following remains: R measured = 2* Rc + d*Rsheet
JA Solar Confidential, Internal Use Only
11
JA Solar Confidential, Internal Use Only 9
JA Solar (Yangzhou) Dept. R&D
TLM的基本原理与应用
The application of the measured resistances over the distance d of the particular contact finger results in a straight line. The increase of this line is proportional to the film resistor, the axis intercept corresponds to the 2-time contact resistor
JA Solar (Yangzhou) Dept. R&D
接触电阻测量原理
R&D Center 2011-9-23
JA Solar (Yangzhou) Dept. R&D
Outline
接触电阻的定义 Core Scan 的基本原理与应用 TLM 的基本原理与应用 使用建议
JA Solar Confidential, Internal Use Only
5
JA Solar (Yangzhou) Dept. R&D
Core Scan 的基本原理与应用
Rcl 均匀良好 边缘刻蚀不良 烧结炉带支点降低烧结 温度， 增加Rcl
Failure analysis
JA Solar Confidential, Internal Use Only
6
JA Solar (Yangzhou) Dept. R&D
JA Solar Confidential, Internal Use Only
10
JA Solar (Yangzhou) Dept. R&D
使用建议
用Core Scan 扫描分析接触的面均匀性，以及接触电阻的相对比较（颜色差异） 结合Core Scan、EL使用TLM定量分析接触电阻的数值 TLM制样时，选取栅线印刷均匀良好的电池。这样可以得到相对准确的比接触 电阻