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Buffiere, M., Zaghi, A. E., Lenaers, N., Batuk, M., Khelifi, S., Drijkoningen, J., Hamon, J., Stesmans, A., Kepa, J., Afanas'ev, V. V., Hadermann, J., D'Haen, J., Manca, J., Vleugels, J., Meuris, M. & Poortmans, J. (2014) Effect of Binder Content in Cu-In-Se Precursor Ink on the Physical and Electrical Properties of Printed CuInSe2 Solar Cells. J. Phys. Chem. C, 118 27201–27209. 
Added by: Laurent Cournède (2016-03-10 21:01:54)
Type de référence: Article
DOI: 10.1021/jp507209h
Numéro d'identification (ISBN etc.): 1932-7447
Clé BibTeX: Buffiere2014
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Catégories: IMN
Mots-clés: absorber layers, films, nanoparticles, nonvacuum, selenization, semiconductors
Créateurs: Afanas'ev, Batuk, Buffiere, D'Haen, Drijkoningen, Hadermann, Hamon, Kepa, Khelifi, Lenaers, Manca, Meuris, Poortmans, Stesmans, Vleugels, Zaghi
Collection: J. Phys. Chem. C
Consultations : 2/885
Indice de consultation : 3%
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Résumé     
Printed chalcopyrite thin films have attracted considerable attention in recent years due to their potential in the high-throughput production of photovoltaic devices. To improve the homogeneity of printed CuInSe2 (CISe) layers, chemical additives such as binder can be added to the precursor ink. In this contribution, we investigate the influence of the dicyandiamide (DCDA) content, used as a binder in the precursor ink, on the physical and electrical properties of printed CISe solar cells. It is shown that the use of the binder leads to a dense absorber, composed of large CISe grains close to the surface, while the bulk of the layer consists of CISe crystallites embedded in a CuxS particle based matrix, resulting from the limited sintering of the precursor in this region. The expected additional carbon contamination of the CISe layer due to the addition of the binder appears to be limited, and the optical properties of the CISe layer are similar to the reference sample without additive. The electrical characterization of the corresponding CISe/CdS solar cells shows a degradation of the efficiency of the devices, due to a modification in the predominant recombination mechanisms and a limitation of the space charge region width when using the binder; both effects could be explained by the inhomogeneity of the bulk of the CISe absorber and high defect density at the CISe/CuxS-based matrix interface.
Added by: Laurent Cournède  
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