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Synthesis of Type I PbSe/CdSe Dot-on-Plate Heterostructures with Near-Infrared Emission.
J Am Chem Soc ; 141(13): 5092-5096, 2019 Apr 03.
Artigo em Inglês | MEDLINE | ID: mdl-30882213
ABSTRACT
Zero-dimensional PbSe quantum dots are heterogeneously nucleated and grown onto two-dimensional zincblende CdSe nanoplatelets. Electron microscopy shows ad-grown dots predominantly decorate edges and corners of the nanoplatelets. Spectroscopic characterizations relate type I electronic alignment as demonstrated via photoluminescence excitation spectroscopy enhancement of near-infrared emission. Transient photoluminescence and absorption convey ultrafast transfer of excitons to the lower energy semiconductor dots. These structures combine benefits of large absorption cross sections of nanoplatelets and efficient near-infrared emission of PbSe with quantum confinement tuning of energy gap.

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Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Idioma: Inglês Revista: J Am Chem Soc Ano de publicação: 2019 Tipo de documento: Artigo País de afiliação: Estados Unidos