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Perovskite-Quantum Dots Interface: Deciphering its Ultrafast Charge Carrier Dynamics
dc.contributor.author | Galar, Pavel | |
dc.contributor.author | Piatkowski, Piotr | |
dc.contributor.author | Ngo, Thi Tuyen | |
dc.contributor.author | Gutiérrez Tovar, Mario | |
dc.contributor.author | Mora-Sero, Ivan | |
dc.contributor.author | Douhal, Abderrazzak | |
dc.date.accessioned | 2018-07-09T10:01:36Z | |
dc.date.available | 2018-07-09T10:01:36Z | |
dc.date.issued | 2018 | |
dc.identifier.citation | GALAR, Pavel, et al. Perovskite-quantum dots interface: Deciphering its ultrafast charge carrier dynamics. Nano Energy, 2018, vol. 49, p. 471-480. | ca_CA |
dc.identifier.issn | 2211-2855 | |
dc.identifier.uri | http://hdl.handle.net/10234/175538 | |
dc.description.abstract | Understanding electron and hole (e,h) transport at semiconductor interfaces is paramount to developing efficientoptoelectronic devices. Halide perovskite/semiconductor quantum dots (QDs) have emerged as smart hybridsystems with a huge potential for light emission and energy conversion. However, the dynamics of generated e-hpairs are not fully understood. Ultrafast UV–VIS transient absorption and THz spectroscopies have enabled us tounravel the processes of the e-h recombination within a hybrid film of methylammonium lead triiodide (MAPbI3)interacting with different amount of PbS/CdS core/shell QDs. To accurately analyze the complex behavior, weapplied a new model for e-h events in this hybrid material. The results obtained with sample having a highconcentration of QDs (7.3 mass percentage) indicate: (i) a large population (92%) of the photogenerated chargecarriers are affected by QDs presence. The main part of these carriers (85% of the total) in perovskite domaindiffuse towards QDs, where they transfer to the interface (electrons) and QD´s valence bands (holes) with rateconstants of 1.2 × 1010s−1and 4.6 × 1010s−1, respectively. 7% of these affected charged entities are excitonsin the perovskite domain in close vicinity of the interface, and show a recombination rate constant of 3.7 × 1010s−1.(ii) The carriers not affected by QDs presence (8%) recombine through known perovskite deactivationchannels. Lowering the QDs mass percentage to 0.24 causes a decrease of electron and hole effective transfer rateconstants, and disappearance of excitons. These results provide clues to improve the performance of perovskite/QD based devices | ca_CA |
dc.format.extent | 32 p. | ca_CA |
dc.format.mimetype | application/pdf | ca_CA |
dc.language.iso | eng | ca_CA |
dc.publisher | Elsevier | ca_CA |
dc.relation.isPartOf | Nano Energy 49 (2018) | ca_CA |
dc.rights | 2211-2855/ © 2018 Elsevier Ltd. All rights reserved. | ca_CA |
dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | * |
dc.subject | Perovskite | ca_CA |
dc.subject | Quantum dots | ca_CA |
dc.subject | LEDs | ca_CA |
dc.subject | Lighting | ca_CA |
dc.subject | Hybrid nanostructures | ca_CA |
dc.subject | Electron and hole dynamics | ca_CA |
dc.title | Perovskite-Quantum Dots Interface: Deciphering its Ultrafast Charge Carrier Dynamics | ca_CA |
dc.type | info:eu-repo/semantics/article | ca_CA |
dc.identifier.doi | https://doi.org/10.1016/j.nanoen.2018.04.069 | |
dc.relation.projectID | MAT2014-57646-P ; MAT2016-76892-C3-1-R ; PEII-2014-003-P ; 724424 - No-LIMIT | ca_CA |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | ca_CA |
dc.relation.publisherVersion | https://www.sciencedirect.com/science/article/pii/S2211285518302982 | ca_CA |
dc.date.embargoEndDate | 2020-04-28 | |
dc.type.version | info:eu-repo/semantics/acceptedVersion | ca_CA |
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