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HL: Halbleiterphysik

HL 27: Poster II: SiC (1-7), Ultrakurzzeitdynamik (8-15), Halbleiterlaser (16-20), GaN (21-38), III-V Halbleiter (39-56), Photovoltaik (57-64), Störstellen (65-68), Tern
äre Halbleiter (69-70)

HL 27.58: Poster

Mittwoch, 29. März 2000, 14:00–19:00, A

Energy output study of mc-Si solar cells with visually attractive bus bars — •R. Ebner, M. Radike, and J. Summhammer — Atomic Institute of the Austrian Universities, Vienna, Austria

One of the major demands of architects concerning the use of photovoltaics (PV) in building integration is to reduce the annoying visual appearance of the bus bars on the front side of solar cells. A recent EU-Joule funded project BIMODE (”Development of bi-functional photovoltaic modules for building integration”) under the coordination of BP-Solar dealt with this problem. The sub-task of the Solar Cells Group of the Atomic Institute of the Austrian Universities (AIAU) was the investigation of crystalline silicon solar cells equipped with decoratively patterned bus bars, such that roofs and facades with PV would attain an additional aesthetic effect and enhanced architectural value combined with almost the same energy output.
Our basic strategy was to build up a module with only a few types of bus bar patterns for the individual cells. This would permit a large variety of combinations to achieve many different appearances at the module level. In a previous work the patterns were simulated theoretically.
Here we present the experimental verification, done on Bayer-Solar, 1Ohm.cm, boron pre-doped mc-Si wafers of size 100x100mm². The results indicate that the optimization of current collection from the front side of crystalline silicon solar cells is not opposed to the aim of high output power. Rather, there is a wide margin for design, without significantly loosing on performance.