[en] laser scribing ; solar cells ; thermoreflectance ; CdTe thin film ; thermal diffusivity
[en] We present a thermoreflectance-based metrology concept applied to compound semiconductor thin films off-line characterization in the solar cells scribing process. The presented thermoreflectance setup has been used to evaluate the thermal diffusivity of thin CdTe films and to measure eventual changes in the thermal properties of 5 μm CdTe films ablated by nano and picosecond laser pulses. The temperature response of the CdTe thin film to the nanosecond heating pulse has been numerically investigated using the finite-difference time-domain (FDTD) method. The computational and experimental results have been compared.
Centre Spatial de Liège - CSL
Région wallonne : Direction générale des Technologies, de la Recherche et de l'Energie - DGTRE