Modulation of Charge Recombination in CsPbBr3 Perovskite Films with Electrochemical Bias

Handle URI:
http://hdl.handle.net/10754/626715
Title:
Modulation of Charge Recombination in CsPbBr3 Perovskite Films with Electrochemical Bias
Authors:
Scheidt, Rebecca A; Samu, Gergely F.; Janáky, Csaba; Kamat, Prashant V.
Abstract:
The charging of mesoscopic TiO2 layer in a metal halide perovskite solar cell can influence the overall power conversion efficiency. By employing CsPbBr3 films deposited on a mesoscopic TiO2 film, we have succeeded in probing the influence of electrochemical bias on the charge carrier recombination process. The transient absorption spectroscopy experiments conducted at different applied potentials indicate a decrease in the charge carrier lifetimes of CsPbBr3 as we increase the potential from -0.6 V to + 0.6 V vs. Ag/AgCl. The charge carrier lifetime increased upon reversing the applied bias, thus indicating the reversibility of the photoresponse to charging effects. The ultrafast spectroelectrochemical experiments described here offer a convenient approach to probe the charging effects in perovskite solar cells.
Citation:
Scheidt RA, Samu GF, Janáky C, Kamat PV (2017) Modulation of Charge Recombination in CsPbBr3 Perovskite Films with Electrochemical Bias. Journal of the American Chemical Society. Available: http://dx.doi.org/10.1021/jacs.7b10958.
Publisher:
American Chemical Society (ACS)
Journal:
Journal of the American Chemical Society
KAUST Grant Number:
OCRF-2014-CRG3-2268
Issue Date:
13-Nov-2017
DOI:
10.1021/jacs.7b10958
Type:
Article
ISSN:
0002-7863; 1520-5126
Sponsors:
PVK acknowledges support by the Division of Chemical Sciences, Geosciences, and Biosciences, Office of Basic Energy Sciences of the U.S. Department of Energy (award DE-FC02-04ER15533). RS acknowledges support of King Abdullah University of Science and Technology (KAUST-Award OCRF-2014-CRG3-2268). This collaborative research received funding from the European Research Council (ERC) under the EU’s Horizon 2020 research and innovation program (GFS and CJ, grant agreement No 716539). ELIALPS is supported by the EU and co-financed by the European Regional Development Fund (GOP-1.1.1-12/B-2012-000, GINOP-2.3.6-15-2015-00001). This is contribution number NDRL No.5191 from the Notre Dame Radiation Laboratory.
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Full metadata record

DC FieldValue Language
dc.contributor.authorScheidt, Rebecca Aen
dc.contributor.authorSamu, Gergely F.en
dc.contributor.authorJanáky, Csabaen
dc.contributor.authorKamat, Prashant V.en
dc.date.accessioned2018-01-04T07:51:41Z-
dc.date.available2018-01-04T07:51:41Z-
dc.date.issued2017-11-13en
dc.identifier.citationScheidt RA, Samu GF, Janáky C, Kamat PV (2017) Modulation of Charge Recombination in CsPbBr3 Perovskite Films with Electrochemical Bias. Journal of the American Chemical Society. Available: http://dx.doi.org/10.1021/jacs.7b10958.en
dc.identifier.issn0002-7863en
dc.identifier.issn1520-5126en
dc.identifier.doi10.1021/jacs.7b10958en
dc.identifier.urihttp://hdl.handle.net/10754/626715-
dc.description.abstractThe charging of mesoscopic TiO2 layer in a metal halide perovskite solar cell can influence the overall power conversion efficiency. By employing CsPbBr3 films deposited on a mesoscopic TiO2 film, we have succeeded in probing the influence of electrochemical bias on the charge carrier recombination process. The transient absorption spectroscopy experiments conducted at different applied potentials indicate a decrease in the charge carrier lifetimes of CsPbBr3 as we increase the potential from -0.6 V to + 0.6 V vs. Ag/AgCl. The charge carrier lifetime increased upon reversing the applied bias, thus indicating the reversibility of the photoresponse to charging effects. The ultrafast spectroelectrochemical experiments described here offer a convenient approach to probe the charging effects in perovskite solar cells.en
dc.description.sponsorshipPVK acknowledges support by the Division of Chemical Sciences, Geosciences, and Biosciences, Office of Basic Energy Sciences of the U.S. Department of Energy (award DE-FC02-04ER15533). RS acknowledges support of King Abdullah University of Science and Technology (KAUST-Award OCRF-2014-CRG3-2268). This collaborative research received funding from the European Research Council (ERC) under the EU’s Horizon 2020 research and innovation program (GFS and CJ, grant agreement No 716539). ELIALPS is supported by the EU and co-financed by the European Regional Development Fund (GOP-1.1.1-12/B-2012-000, GINOP-2.3.6-15-2015-00001). This is contribution number NDRL No.5191 from the Notre Dame Radiation Laboratory.en
dc.publisherAmerican Chemical Society (ACS)en
dc.titleModulation of Charge Recombination in CsPbBr3 Perovskite Films with Electrochemical Biasen
dc.typeArticleen
dc.identifier.journalJournal of the American Chemical Societyen
dc.contributor.institutionDepartment of Chemistry and Biochemistry, University of Notre Dameen
dc.contributor.institutionRadiation Laboratory, University of Notre Dame, Notre Dame, Indiana, 46556, United Statesen
dc.contributor.institutionDepartment of Physical Chemistry and Materials Science, University of Szeged, Rerrich Square 1, Szeged, H-6720, Hungaryen
dc.contributor.institutionELI-ALPS Research Institute, Szeged, Dugonics sq. 13, 6720, Hungaryen
kaust.grant.numberOCRF-2014-CRG3-2268en
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