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dc.contributor.authorSheikh, Arif D.
dc.contributor.authorBera, Ashok
dc.contributor.authorHaque, Mohammed
dc.contributor.authorBaby, Rakhi Raghavan
dc.contributor.authorDel Gobbo, Silvano
dc.contributor.authorAlshareef, Husam N.
dc.contributor.authorWu, Tao
dc.date.accessioned2015-08-03T12:35:11Z
dc.date.available2015-08-03T12:35:11Z
dc.date.issued2015-06
dc.identifier.issn09270248
dc.identifier.doi10.1016/j.solmat.2015.01.023
dc.identifier.urihttp://hdl.handle.net/10754/564176
dc.description.abstractOrganometal trihalide perovskite solar cells have recently attracted lots of attention in the photovoltaic community due to their escalating efficiency and solution processability. The most efficient organometallic mixed-halide sensitized solar cells often employ 2,2′7,7′-tetrakis-(N,N-di-p-methoxyphenyl-amine)-9,9′-spirobifluorene (spiro-MeOTAD) as the hole-transporting material. In this work, we investigated the effect of different atmospheric storage conditions, particularly vacuum, dry nitrogen, and dry air, on the photovoltaic performance of TiO2-CH3NH3PbI3-xClx-spiro-MeOTAD solar cells. We found that spin coating of spiro-MeOTAD in an oxygen atmosphere alone was not adequate to functionalize its hole-transport property completely, and our systematic experiments revealed that the device efficiency depends on the ambient atmospheric conditions during the drying process of spiro-MeOTAD. Complementary incident photon to current conversion efficiency (IPCE), light absorption and photoluminescence quenching measurements allowed us to attribute the atmosphere-dependent efficiency to the improved electronic characteristics of the solar cells. Furthermore, our Fourier transform infrared and electrical impedance measurements unambiguously detected modifications in the spiro-MeOTAD after the drying processes in different gas environments. Our findings demonstrate that proper oxidization and p-doping in functionalizing spiro-MeOTAD play a very critical role in determining device performance. These findings will facilitate the search for alternative hole-transporting materials in high-performance perovskite solar cells with long-term stability.
dc.description.sponsorshipThe research reported in this publication was supported by King Abdullah University of Science and Technology (KAUST).
dc.publisherElsevier BV
dc.subjectOrganometal halide
dc.subjectPerovskite
dc.subjectSolar cell
dc.subjectspiro-MeOTAD
dc.titleAtmospheric effects on the photovoltaic performance of hybrid perovskite solar cells
dc.typeArticle
dc.contributor.departmentFunctional Nanomaterials and Devices Research Group
dc.contributor.departmentKAUST Solar Center (KSC)
dc.contributor.departmentLaboratory of Nano Oxides for Sustainable Energy
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalSolar Energy Materials and Solar Cells
kaust.personSheikh, Arif D.
kaust.personBera, Ashok
kaust.personBaby, Rakhi Raghavan
kaust.personDel Gobbo, Silvano
kaust.personAlshareef, Husam N.
kaust.personWu, Tao
kaust.personHaque, Mohammed


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