Microcrystalline/Micromorph Silicon Thin-Film Solar Cells Prepared by the VHF-GD Technique

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.


Published in:
Solar Energy Materials and Solar Cells, 66, 1-4, 397-403
Year:
2001
ISSN:
09270248
Note:
IMT-NE Number: 310
Laboratories:


Note: The status of this file is: Involved Laboratories Only


 Record created 2009-02-10, last modified 2018-09-13

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