Unconventional triple junction solar cells based on micro technologies

Triple junction solar cells are the heart of concentrated photovoltaic systems. We present here microfabrication processes that are especially developed to enable advanced triple junction solar cells structures that have a potential of improvement of the CPV competitivity. Plasma etching processes and redistribution layer fabrication methods are reported and applied to fabricate solar cells with base and emitter contacts both on the front side or both on the rear side of the cells.