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On the assessment of CIGS surface passivation by photoluminescence
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics.
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2015 (English)In: Physica Status Solidi. Rapid Research Letters, ISSN 1862-6254, E-ISSN 1862-6270, Vol. 9, no 5, 288-292 p.Article in journal (Refereed) Published
Abstract [en]

An optimized test structure to study rear surface passivation in Cu(In,Ga)Se-2 (CIGS) solar cells by means of photoluminescence (PL) is developed and tested. The structure - illustrated in the abstract figure - is examined from the rear side. To enable such rear PL assessment, a semi-transparent ultrathin Mo layer has been developed and integrated in place of the normal rear contact. The main advantages of this approach are (i) a simplified representation of a rear surface passivated CIGS solar cell is possible, (ii) it is possible to assess PL responses originating close to the probed rear surface, and (iii) a stable PL response as a function of air exposure time is obtained. In this work, PL measurements of such structures with and without rear surface passivation layers have been compared, and the measured improvement in PL intensity for the passivated structures is associated with enhanced CIGS rear interface properties. [GRAPHICS] Transmission electron microscope (TEM) bright field cross-section image of the rear illuminated test structure fabricated for PL characterization.

Place, publisher, year, edition, pages
2015. Vol. 9, no 5, 288-292 p.
Keyword [en]
solar cells, thin films, CuInGaSe2, surface passivation, photoluminescence
National Category
Environmental Engineering Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-256541DOI: 10.1002/pssr.201510081ISI: 000354888300002OAI: oai:DiVA.org:uu-256541DiVA: diva2:826391
Available from: 2015-06-25 Created: 2015-06-24 Last updated: 2017-12-04Bibliographically approved

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Joel, JonathanVermang, BartLarsen, JesDonzel-Gargand, OlivierEdoff, Marika

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