Diffusion of Fe and Na in co-evaporated Cu(In, Ga) Se-2 devices on steel substrates
2013 (English)In: Thin Solid Films, ISSN 0040-6090, E-ISSN 1879-2731, Vol. 535, 188-192 p.Article in journal (Refereed) Published
In this work we study impurity diffusion into Cu(In, Ga) Se-2 from stainless steel substrates with and without Cr diffusion barriers using secondary ion mass spectrometry. For these substrate configurations we compare cases with and without adding NaF as a sodium precursor. A clear increase in impurity diffusion from the substrate is observed for samples with NaF. Devices made using our micro pilot line show the expected correlation between Fe content, Na content and efficiency, but the highest device efficiency obtained for steel substrates is still slightly below that of the glass substrate reference. We discuss reasons for the observed device performance.
Place, publisher, year, edition, pages
2013. Vol. 535, 188-192 p.
Copper indium gallium selenide, Steel substrate, Sodium fluoride
Engineering and Technology Natural Sciences
Research subject Engineering Science with specialization in Electronics
IdentifiersURN: urn:nbn:se:uu:diva-203300DOI: 10.1016/j.tsf.2012.11.067ISI: 000318973600042OAI: oai:DiVA.org:uu-203300DiVA: diva2:636132
Symposium B on Thin Film Chalcogenide Photovoltaic Materials of the 11th E-MRS Spring Meetings, MAY, 2012, Strasbourg, FRANCE