Limited laser beam induced current measurements: a tool for analysing integrated photovoltaic modules
Limited laser beam induced current measurements: a tool for analysing integrated photovoltaic modules
复制标题
有限激光束感应电流测量：分析集成光伏模块的工具
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
R. Gottschalg
中科院分区：
文献类型：
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作者：
P. Vorasayan;T. Betts;R. Gottschalg
介绍了一种新的限幅激光束感生电流（li-LBIC）测量技术，该技术可以恢复集成光伏（PV）组件中的真实信号。这是一种基于通过用激光扫描来光学激发设备的测量，其中通过操纵背景照明使被探测的细胞处于限制条件下。所获得的信号与激光强度成正比，这是以前无法通过模块中的典型LBIC测量获得的。其优点是，它提供了测量所研究电池的真实的性能的机会，并且可用于完全封装的串联光伏模块。它也不受不均匀背景照明的影响。该系统提供了空间分辨的测量，并已被证明是一个有效的表征工具，以揭示亚毫米分辨率的光伏器件的空间非均匀性。它可以用作商业模块的表征工具，不仅用于新生产的PV设备的质量控制，而且还用于其运行寿命的各个阶段的损耗分析。
A new limiting laser beam induced current (li-LBIC) measurement technique is described which allows the recovery of the true signal in an integrated photovoltaic (PV) module. It is a measurement based on optically exciting the device by scanning with a laser, where the probed cell is brought under limiting condition by means of manipulating the background illumination. The signal obtained is directly proportional to the laser strength, which was previously unobtainable by typical LBIC measurements in a module. The advantages are shown to be that it gives an opportunity to measure the real properties of investigated cells and is usable for fully encapsulated, series connected photovoltaic modules. It is also unaffected by non-uniform background illumination. The system provides spatially resolved measurements and has shown to be an effective characterization tool to reveal spatial non-uniformity in the PV devices with sub-millimetre resolution. It can be employed as a characterization tool for commercial modules functioning not only for quality control of newly produced PV devices but also for loss analysis during various stages of their operating lives.