Publications:
Title: |
FAST CURRENT MAPPING OF PHOTOVOLTAIC DEVICES USING COMPRESSIVE SAMPLING |
|---|---|
| Author(s): | , , , , , and |
| Year: | 2015 |
| Pages: | 29 - 34 |
| Event name: | 31st European Photovoltaic Solar Energy Conference and Exhibition |
| Event place: | Hamburg, Germany |
| Event date: | 2015, September 14 - 18 |
| DOI: | 10.4229/EUPVSEC20152015-1AO.2.3. |
| ISBN: | 3-936338-39-6 |
| Abstract: | Compressed sensing (CS) sampling theory is applied to the Light Beam Induced Current (LBIC) measurement technique in order to significantly reduce measurement time while maintaining or increasing accuracy. Using this method, a current map of the device can be reconstructed from far fewer measurements by means of an optimisation algorithm. Measurement simulations are implemented using a two dimensional photovoltaic (PV) device model to explore the capabilities and limitations of the method. A physical realisation of the technique is demonstrated. The raster scanning process of the LBIC system is replaced with a Digital Micro-mirror Device (DMD) pattern projection system. Measurement speed is also improved due to the response time of the DMD pattern generator, which is less than 20μs. An experimental CS-LBIC setup, alongside with initial experimental results that indicate the feasibility of the method are presented. |