Recent content by 2lai

Thanks Redbelly98. (1) I should say focused beam rather than Gaussian beam. The intensity is not uniform (not collimated either) which may affect the measurement especially for large area cell. (2) Adding a laser beam in the measurement system also add the complexity and $$$. It is also my...

We plan to order a Class-B light source. The cell size is around 3x3 cm^2. The measurement system will be setup in 1-2 months.

In order to build a QE measurement system, I want to confirm the following issues: (1) Is collimated light required for QE characterization of the entire solar cell? How "bad" it could be if having Gaussian beam? (2) It seems LBIC is most common for QE mapping. Is it possible to use...