Action Filename Description Size Access License Resource Version
Show more files...


Hydrogenated microcrystalline silicon prepared at low temperatures by the glow discharge technique is examined here with respect to its role as a new thin-film photovoltaic absorber material. XRD and TEM characterizations reveal that microcrystalline silicon is a semiconductor with a very complex morphology. Microcrystalline p-i-n cells with open-circuit voltages of up to 560-580 mV could be prepared. `Micromorph' tandem solar cells show under outdoor conditions higher short-circuit currents due to the enhanced blue spectra of real sun light and therefore higher efficiencies than under AM1.5 solar simulator conditions. Furthermore, a weak air mass dependence of the short-circuit current density could be observed for such micromorph tandem solar cells. By applying the monolithic series connection based on laser patterning a first micromorph mini-module (total area of 23.6 cm2) with 9% cell conversion efficiency could be fabricated.