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Thin film solar cells based on monocrystalline Si films are transferred to a glass superstrate.Chemical vapor deposition serves to epitaxially deposit Si on quasi-monocrystalline Si films obtained fromthermal crystallization of a double layer porous Si film on a Si wafer. A separation layer that forms duringthis crystallization process allows one to separate the epitaxial layer on top of the quasi-monocrystalline filmfrom the starting Si wafer. We presently achieve an independently confirmed solar cell conversion efficiencyof 9:26%. Ray tracing studies in combination with electrical device simulation indicate an efficiency potentialof around 17% using simple device processing and moderate assumptions on minority carrier lifetime andsurface recombination

Thin film solar cells on glass by transfer of monocrystalline Si films