Atmospheric effects on the photovoltaic performance of hybrid perovskite solar cells

Handle URI:
http://hdl.handle.net/10754/564176
Title:
Atmospheric effects on the photovoltaic performance of hybrid perovskite solar cells
Authors:
Sheikh, Arif D. ( 0000-0003-3823-0947 ) ; Bera, Ashok ( 0000-0002-5643-5973 ) ; Haque, Mohammed; Baby, Rakhi Raghavan; Del Gobbo, Silvano; Alshareef, Husam N. ( 0000-0001-5029-2142 ) ; Wu, Tao ( 0000-0003-0845-4827 )
Abstract:
Organometal 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.
KAUST Department:
Materials Science and Engineering Program; Physical Sciences and Engineering (PSE) Division; Solar and Photovoltaic Engineering Research Center (SPERC); Functional Nanomaterials and Devices Research Group; Laboratory of Nano Oxides for Sustainable Energy
Publisher:
Elsevier BV
Journal:
Solar Energy Materials and Solar Cells
Issue Date:
Jun-2015
DOI:
10.1016/j.solmat.2015.01.023
Type:
Article
ISSN:
09270248
Sponsors:
The research reported in this publication was supported by King Abdullah University of Science and Technology (KAUST).
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program; Solar and Photovoltaic Engineering Research Center (SPERC)

Full metadata record

DC FieldValue Language
dc.contributor.authorSheikh, Arif D.en
dc.contributor.authorBera, Ashoken
dc.contributor.authorHaque, Mohammeden
dc.contributor.authorBaby, Rakhi Raghavanen
dc.contributor.authorDel Gobbo, Silvanoen
dc.contributor.authorAlshareef, Husam N.en
dc.contributor.authorWu, Taoen
dc.date.accessioned2015-08-03T12:35:11Zen
dc.date.available2015-08-03T12:35:11Zen
dc.date.issued2015-06en
dc.identifier.issn09270248en
dc.identifier.doi10.1016/j.solmat.2015.01.023en
dc.identifier.urihttp://hdl.handle.net/10754/564176en
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.en
dc.description.sponsorshipThe research reported in this publication was supported by King Abdullah University of Science and Technology (KAUST).en
dc.publisherElsevier BVen
dc.subjectOrganometal halideen
dc.subjectPerovskiteen
dc.subjectSolar cellen
dc.subjectspiro-MeOTADen
dc.titleAtmospheric effects on the photovoltaic performance of hybrid perovskite solar cellsen
dc.typeArticleen
dc.contributor.departmentMaterials Science and Engineering Programen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentSolar and Photovoltaic Engineering Research Center (SPERC)en
dc.contributor.departmentFunctional Nanomaterials and Devices Research Groupen
dc.contributor.departmentLaboratory of Nano Oxides for Sustainable Energyen
dc.identifier.journalSolar Energy Materials and Solar Cellsen
kaust.authorSheikh, Arif D.en
kaust.authorBera, Ashoken
kaust.authorBaby, Rakhi Raghavanen
kaust.authorDel Gobbo, Silvanoen
kaust.authorAlshareef, Husam N.en
kaust.authorWu, Taoen
kaust.authorHaque, Mohammeden
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