Effect of cs-incorporated NiOx on the performance of perovskite solar cells
Kim, Hui-Seon (Ecole Polytechnique Fédérale de Lausanne)
Seo, Ji-Youn (Ecole Polytechnique Fédérale de Lausanne)
Xie, Haibing (Institut Català de Nanociència i Nanotecnologia)
Lira-Cantu, Monica (Institut Català de Nanociència i Nanotecnologia)
Zakeeruddin, Shaik Mohammed (Ecole Polytechnique Fédérale de Lausanne)
Grätzel, Michael (Ecole Polytechnique Fédérale de Lausanne)
Hagfeldt, Anders (Ecole Polytechnique Fédérale de Lausanne)

Date:	2017
Abstract:	The effect of Cs-incorporated NiO on perovskite solar cells with an inverted structure was investigated, where NiO and PCBM were used as selective contacts for holes and electrons, respectively. It was found that the generation of an Ni phase in an NiO layer was significantly suppressed by employing cesium. Furthermore, Cs-incorporated NiO enabled holes to be efficiently separated at the interface, showing the improved photoluminescent quenching and thus generating higher short-circuit current. The effect of Cs incorporation was also prominent in the inhibition of recombination. The recombination resistance of Cs-incorporated NiO was noticeably increased by more than three-fold near the maximum power point leading to a higher fill factor of 0. 78 and consequently a higher power conversion efficiency of 17. 2% for the device employing Cs-incorporated NiO.
Grants:	European Commission 604391 Ministerio de Economía y Competitividad SEV-2013-0295 Ministerio de Economía y Competitividad ENE2016-79282-C5-2-R Ministerio de Economía y Competitividad CTQ2016-81911-REDT Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-1212
Note:	This is an open access article published under an ACS AuthorChoice License. See Standard ACS AuthorChoice/Editors' Choice Usage Agreement - https://pubs.acs.org/page/policy/authorchoice_termsofuse.html
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Published in:	ACS omega, Vol. 2, Issue 12 (December 2017) , p. 9074-9079, ISSN 2470-1343

DOI: 10.1021/acsomega.7b01179
PMID: 31457429

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
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Articles > Published articles