Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/30484
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dc.contributor.authorLopes, T. S.pt_PT
dc.contributor.authorCunha, J. M. V.pt_PT
dc.contributor.authorBose, S.pt_PT
dc.contributor.authorBarbosa, J. R. S.pt_PT
dc.contributor.authorBorme, J.pt_PT
dc.contributor.authorDonzel-Gargand, O.pt_PT
dc.contributor.authorRocha, C.pt_PT
dc.contributor.authorSilva, R.pt_PT
dc.contributor.authorHultqvist, A.pt_PT
dc.contributor.authorChen, W.-C.pt_PT
dc.contributor.authorSilva, A. G.pt_PT
dc.contributor.authorEdoff, M.pt_PT
dc.contributor.authorFernandes, P. A.pt_PT
dc.contributor.authorSalomé, P. M. P.pt_PT
dc.date.accessioned2021-02-04T10:29:45Z-
dc.date.available2021-02-04T10:29:45Z-
dc.date.issued2019-09-
dc.identifier.issn2156-3381pt_PT
dc.identifier.urihttp://hdl.handle.net/10773/30484-
dc.description.abstractCurrently, one of the main limitations in ultrathin Cu(In,Ga)Se2 (CIGS) solar cells are the optical losses, since the absorber layer is thinner than the light optical path. Hence, light management, including rear optical reflection and light trapping is needed. In this work we focus on increasing the rear optical reflection. For this, a novel structure based on having a metal interlayer in between the Mo rear contact and the rear passivation layer is presented. In total, eight different metallic interlayers are compared. For the whole series, the passivation layer is aluminum oxide (Al2O3). The interlayers are used to enhance the reflectivity of the rear contact and thereby increasing the amount of light reflected back into the absorber. In order to understand the effects of the interlayer in the solar cell performance both from optical and/or electrical point of view, optical simulations were performed together with fabrication and electrical measurements. Optical simulations results are compared with current density-voltage (J-V) behavior and external quantum efficiency (EQE) measurements. A detailed comparison between all the interlayers is done, in order to identify the material with the greatest potential to be used as rear reflective layer for ultrathin CIGS solar cells and to establish fabrication challenges. The Ti-W alloy is a promising rear reflective layer since it provides solar cells with light to power conversion efficiency values of 9.9 %, which is 2.2 % (abs) higher than the passivated ultrathin sample and 3.7 % (abs) higher than the unpassivated ultrathin reference sample.pt_PT
dc.language.isoengpt_PT
dc.publisherIEEEpt_PT
dc.relationIF/00133/2015pt_PT
dc.relationPD/BD/142780/2018pt_PT
dc.relationinfo:eu-repo/grantAgreement/EC/H2020/720887/EUpt_PT
dc.relation028075pt_PT
dc.relation029696pt_PT
dc.rightsopenAccesspt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt_PT
dc.subjectThin film solar cellspt_PT
dc.subjectOptical simulationpt_PT
dc.subjectLight trappingpt_PT
dc.subjectBack/rear contactpt_PT
dc.subjectCu(In,Ga)Se2pt_PT
dc.titleRear optical reflection and passivation using a nanopatterned metal/dielectric structure in thin-film solar cellspt_PT
dc.typearticlept_PT
dc.description.versionpublishedpt_PT
dc.peerreviewedyespt_PT
degois.publication.firstPage1421pt_PT
degois.publication.issue5pt_PT
degois.publication.lastPage1427pt_PT
degois.publication.titleIEEE Journal of Photovoltaicspt_PT
degois.publication.volume9pt_PT
dc.identifier.doi10.1109/JPHOTOV.2019.2922323pt_PT
dc.identifier.essn2156-3403pt_PT
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