Highly Charged Excitons and Biexcitons in Type-II Core/Crown Colloidal Nanoplatelets
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INVESTIGACIONMetadatos
Título
Highly Charged Excitons and Biexcitons in Type-II Core/Crown Colloidal NanoplateletsFecha de publicación
2022-04-28Editor
American Chemical SocietyISSN
1932-7447; 1932-7455Cita bibliográfica
Highly Charged Excitons and Biexcitons in Type-II Core/Crown Colloidal Nanoplatelets Jordi Llusar and Juan I. Climente The Journal of Physical Chemistry C 2022 126 (16), 7152-7157 DOI: 10.1021/acs.jpcc.2c00827Tipo de documento
info:eu-repo/semantics/articleVersión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
The optoelectronic properties of type-II CdSe/CdTe colloidal nanoplatelets (NPLs) charged with neutral excitons (X0) have been intensively investigated in the last years. Motivated by the recent experimental progress, ... [+]
The optoelectronic properties of type-II CdSe/CdTe colloidal nanoplatelets (NPLs) charged with neutral excitons (X0) have been intensively investigated in the last years. Motivated by the recent experimental progress, here we use effective mass simulations to study the effect of charging core/crown NPLs with a few extra electrons or holes. Emission spectra are calculated for charged excitons (Xn, with n = 2 to n = −3) and biexcitons (XX). The strong Coulomb interactions within the platelet lead to a number of remarkable properties. For excitons, varying the number of excess charges gives rise to band gap red- and blue-shifts spanning over 100 meV and widely tunable oscillator strength. For biexcitons, the binding energy can be tuned from nearly nonbonding to strongly antibonding (∼40 meV) by modulating the core/crown area ratio. We conclude that the number of excess carriers injected into type-II NPLs is a versatile degree of freedom to modulate the optoelectronic properties. [-]
Publicado en
J. Phys. Chem. C 2022, 126, 7152−7157Datos relacionados
https://pubs.acs.org/doi/10.1021/acs.jpcc.2c00827Entidad financiadora
Ministerio de Ciencia, Innovación y Universidades (Spain) | Universitat Jaume I
Código del proyecto o subvención
CTQ2017-83781-P | UJI-B2021-06
Derechos de acceso
© 2022 The Authors. Published by American Chemical Society
info:eu-repo/semantics/openAccess
info:eu-repo/semantics/openAccess
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