The effect of Mo back contact ageing on Cu(In,Ga)Se-2 thin-film solar cells
2014 (English)In: Progress in Photovoltaics, ISSN 1062-7995, E-ISSN 1099-159X, Vol. 22, no 1, 83-89 p.Article in journal (Refereed) Published
In this work, we investigate the effect of ageing Mo-coated substrates in a dry and N-2 flooded cabinet. The influence was studied by preparing Cu(In,Ga)Se-2 solar cells and by comparing the electrical performance with devices where the Mo layer was not aged. The measurements used for this study were current-voltage (J-V), external quantum efficiency (EQE), secondary ion mass spectroscopy (SIMS) and capacitance-voltage (C-V). It was concluded that devices prepared with the aged Mo layer have, in average, an increase of 0.8% in efficiency compared with devices that had a fresh Mo layer. Devices with aged Mo exhibited a nominal increase of 12.5mV of open circuit voltage, a decrease of 1.1mA/cm(-2) of short circuit current and a fill factor increase of 2.4%. Heat treatment of fresh Mo layers in oxygen atmosphere was also studied as an alternative to ageing and was shown to provide a similar effect to the aged device's performance.
Place, publisher, year, edition, pages
2014. Vol. 22, no 1, 83-89 p.
Cu(In, Ga)Se-2, CIGS, thin-film solar cells, molybdenum (Mo), chalcopyrites
Natural Sciences Engineering and Technology
Research subject Engineering Science with specialization in Electronics
IdentifiersURN: urn:nbn:se:uu:diva-216062DOI: 10.1002/pip.2360ISI: 000328248500011OAI: oai:DiVA.org:uu-216062DiVA: diva2:689172