Aliovalent Doping in Colloidal Quantum Dots and Its Manifestation on Their Optical Properties: Surface Attachment versus Structural Incorporation

Alexandros Stavrinadis; Jacopo S. Pelli Cresi; Francesco d’Acapito; César Magén; Federico Boscherini; Gerasimos Konstantatos

doi:10.1021/acs.chemmater.6b01445

journal article·2016-08-09

Aliovalent Doping in Colloidal Quantum Dots and Its Manifestation on Their Optical Properties: Surface Attachment versus Structural Incorporation

Alexandros Stavrinadis, Jacopo S. Pelli Cresi, Francesco d’Acapito, César Magén, Federico Boscherini, Gerasimos Konstantatos

Chemistry of Materials· Volume 28· Issue 15

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Source abstract

Abstract

Doping colloidal quantum dots (CQDs) with aliovalent cations is a promising, yet underexplored, approach to control the optoelectronic properties in CQDs. In CQD doping, kinetics determine whether a dopant element will incorporate into the host crystal structure, while thermodynamics dictate the mechanism of dopant incorporation. Here, we show that those mechanisms can be readily monitored by simple optical measurements and XRD studies in CQD ensembles. Based on this, we outline the critical role of dopant solubility limit in CQD doping, bridging the gap between nanocrystalline and bulk semiconductors. Finally, we present a combined simulation and X-ray absorption fine structure (XAFS) data study to shed new insights on the origin of charge compensation upon doping in CQD materials that has, thus far, limited high doping efficacy, even under efficient dopant incorporation schemes.

Source: openalex_inverted_index · Quality: baseline

Research context

Nanomaterials Electronic materials

OpenAlex topics: Quantum Dots Synthesis And Properties · Chalcogenide Semiconductor Thin Films · Nanocluster Synthesis and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain

Department of Physics and Astronomy, University of Bologna, Bologna, Italy

Istituto Officina dei Materiali, Consiglio Nazionale delle Ricerche, c/o ESRF, Grenoble, France

Laboratorio de Microscopías Avanzadas (LMA), Instituto de Nanociencia de Aragon (INA)—ARAID and Departamento de Fisica de la Materia Condensada, Universidad de Zaragoza, 50018 Zaragoza, Spain

ICREA—Institució Catalana de Recerca i Estudis Avançats, Passeig Lluís Companys 23, 08010 Barcelona, Spain

Funding

Fundación Cellex · Ministerio de Economía y Competitividad · Agència de Gestió d’Ajuts Universitaris i de Recerca · Seventh Framework Programme · European Regional Development Fund

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