Reduction of Optical Loss by Combining Innovative Solar Module Technologies

© Fraunhofer CSP

During optical investigations we were able to demonstrate the loss mechanisms of the combinations of different solar module technologies and their spectral distribution and size were assigned to the components.

The individual and combined impact of anti-reflective coatings, thin glass, PVB UV+ and light harvesting strings on optical properties of solar modules is investigated. Optical measurements are used to calculate the spectral distribution of optical loss mechanisms in solar modules. Solar modules with different configurations are built and measured electrically for comparison. The combined optical improvements lead to 5%rel. increase in photo current and 1% absolute gain in module efficiency.