Detection principle

· Photoluminescence (PL for short), the defects of solar cells often limit their photoelectric conversion efficiency and service life

· Photoluminescence can quickly detect silicon wafers through the change of minority carrier lifetime. The principle is to use the principle of photoluminescence to obtain fluorescent photos of crystalline silicon, and it has high resolution to detect the rough surface and internal damage of silicon wafers.

· Compared with the EL test, which needs to touch the sample, the PL test does not touch the sample, so it can monitor the production process of the production cell

Imaging effect