pbse-based colloidal core/shell heterostructures for optoelectronic applications

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ID: 253421
2014
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Résumé
Lead-based (IV–VI) colloidal quantum dots (QDs) are of widespread scientific and technological interest owing to their size-tunable band-gap energy in the near-infrared optical region. This article reviews the synthesis of PbSe-based heterostructures and their structural and optical investigations at various temperatures. The review focuses on the structures consisting of a PbSe core coated with a PbSexS1–x (0 ≤ x ≤ 1) or CdSe shell. The former-type shells were epitaxially grown on the PbSe core, while the latter-type shells were synthesized using partial cation-exchange. The influence of the QD composition and the ambient conditions, i.e., exposure to oxygen, on the QD optical properties, such as radiative lifetime, Stokes shift, and other temperature-dependent characteristics, was investigated. The study revealed unique properties of core/shell heterostructures of various compositions, which offer the opportunity of fine-tuning the QD electronic structure by changing their architecture. A theoretical model of the QD electronic band structure was developed and correlated with the results of the optical studies. The review also outlines the challenges related to potential applications of colloidal PbSe-based heterostructures.
Clé de Référence
zaiats2014materialspbse-based Utilisez cette clé pour citer automatiquement dans le manuscrit lors de l'utilisation de SciMatic Manuscript Manager ou Thesis Manager
Auteurs ;Gary Zaiats;Diana Yanover;Roman Vaxenburg;Jenya Tilchin;Aldona Sashchiuk;Efrat Lifshitz
Revue Nature Materials
Année 2014
DOI
10.3390/ma7117243
URL
http://www.mdpi.com/1996-1944/7/11/7243
Mots-clés
core/shell electronics civil engineering (general)microscopydescriptive and experimental mechanics nuclear engineeringengineering (general) surface oxidationtechnologyelectrical engineering

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