Mostrar el registro sencillo del ítem
Piezoelectric Control of the Exciton Wave Function in Colloidal CdSe/CdS Nanocrystals
dc.contributor.author | Segarra, Carlos | |
dc.contributor.author | Climente, Juan I. | |
dc.contributor.author | Polovitsyn, Anatolii | |
dc.contributor.author | Rajadell Viciano, Fernando | |
dc.contributor.author | Moreels, Iwan | |
dc.contributor.author | Planelles, Josep | |
dc.date.accessioned | 2016-10-13T09:17:51Z | |
dc.date.available | 2016-10-13T09:17:51Z | |
dc.date.issued | 2016-05-25 | |
dc.identifier.citation | SEGARRA, Carlos, et al. Piezoelectric Control of the Exciton Wave Function in Colloidal CdSe/CdS Nanocrystals. The journal of physical chemistry letters, 2016, vol. 7, p. 2182-2188 | ca_CA |
dc.identifier.issn | 1948-7185 | |
dc.identifier.uri | http://hdl.handle.net/10234/163576 | |
dc.description.abstract | Using multiband k·p calculations, we show that strain-engineered piezoelectricity is a powerful tool to modulate the electron−hole spatial separation in a wide class of wurtzite CdSe/CdS nanocrystals. The inherent anisotropy of the hexagonal crystal structure leads to anisotropic strain and, consequently, to a pronounced piezoelectric field along the c axis, which can be amplified or quenched through a proper design of the core−shell structure. The use of large cores and thick shells promotes a gradual departure from quantum confined nanocrystals to a regime dominated by piezoelectric confinement. This allows excitons to evolve from the usual type-I and quasi-type-II behavior to a type-II behavior in dot-in-dots, dot-in-rods, rod-in-rods, and dot-in-plates. Piezoelectric fields explain experimental observations for giant-shell nanocrystals, whose time-resolved photoluminescence reveals long exciton lifetimes for large cores, contrary to the expectations of standard quantum confinement models. They also explain the large differences in exciton lifetimes reported for different classes of CdSe/CdS nanocrystals. | ca_CA |
dc.description.sponsorShip | Support from MINECO project CTQ2014-60178-P, UJI project P1-1B2014-24 and a FPU grant (C.S.) is acknowledged. The present publication is further realized with the support of the Ministero degli Affari Esteri e della Cooperazione Internazionale (IONX-NC4SOL, I.M.). | ca_CA |
dc.format.extent | 7 p. | ca_CA |
dc.format.mimetype | application/pdf | ca_CA |
dc.language.iso | eng | ca_CA |
dc.publisher | American Chemical Society | ca_CA |
dc.relation.isPartOf | The journal of physical chemistry letters, 2016, vol. 7 | ca_CA |
dc.rights | Copyright © 2016 American Chemical Society ACS AuthorChoice - This is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes. | ca_CA |
dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | * |
dc.subject | Anisotropy | ca_CA |
dc.subject | Crystal structure | ca_CA |
dc.subject | Crystallography | ca_CA |
dc.subject | Nanocrystals | ca_CA |
dc.subject | Piezoelectricity | ca_CA |
dc.subject | Semiconductor quantum wells | ca_CA |
dc.subject | Wave functions | ca_CA |
dc.subject | Zinc sulfide | ca_CA |
dc.subject | Core shell structure | ca_CA |
dc.subject | Hexagonal crystal structure | ca_CA |
dc.subject | Inherent anisotropy | ca_CA |
dc.subject | Piezo-electric fields | ca_CA |
dc.subject | Piezoelectric control | ca_CA |
dc.subject | Quantum confinement models | ca_CA |
dc.subject | Spatial separation | ca_CA |
dc.subject | Time-resolved photoluminescence | ca_CA |
dc.subject | Excitons | ca_CA |
dc.title | Piezoelectric Control of the Exciton Wave Function in Colloidal CdSe/CdS Nanocrystals | ca_CA |
dc.type | info:eu-repo/semantics/article | ca_CA |
dc.identifier.doi | http://dx.doi.org/10.1021/acs.jpclett.6b00622 | |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | ca_CA |
dc.relation.publisherVersion | http://pubs.acs.org/doi/full/10.1021/acs.jpclett.6b00622 | ca_CA |
dc.type.version | info:eu-repo/semantics/publishedVersion | ca_CA |
Ficheros en el ítem
Este ítem aparece en la(s) siguiente(s) colección(ones)
-
QFA_Articles [825]
Articles de publicacions periòdiques