LayTec PearL - Monitoring Analyzes System
The PearL monitoring system analyzes the spectrum of photoluminescent radiation emitted from a probed surface after excitation with laser light. It is designed for in-line integration in production lines. Spectroscopic photoluminescence (sPL) gives access to information on the band gap, electronic defects and the related composition of materials, e.g. the gallium / (gallium+indium) ratio (Ga/(Ga+In) ratio) and copper (Cu) content of CIGS solar cells. LayTec’s sPL has a total measurement and analysis time of only 100 ms.
PearL`s advantages under production conditions:
- Reliable CIGS characterization across the full module length at different points;
- Spatially resolved information about band gap, material composition and quality of the …
PearL is based on LayTec’s modular platform for in-line optical set-ups. Up to three optical heads can be attached to a single PearL controller, to monitor the composition simultaneously on three traces on moving specimen. This allows accurate monitoring of the center to edge uniformity of the material composition. A controller unit contains all optical and e…
- fast detection of the effective Ga content of the absorber in CIGS-based production lines
- product version for CdTe absorbers also available
- adaptable to every in-line process via customized optical heads and mounts
- in-line integration for 100% inspection of produced modules
- spatially resolved spectral photoluminescence measurements through multiple heads
- fast data acquisition for in-line measurements on moving substrates
- up to 10 measurements per second
- automated spectrum analysis calculation of key parameters e.g. Ga/(Ga+In) and Cu content of CIGS layers
- PV-line software integration via Profibus, Ethernet, TCP/IP or other protocols for automated operation