Control of efficiency of photon energy up-conversion in CdSe/ZnS quantum dots

• Tipo: Artigo em Revista Científica Internacional
• Data: 2003

Autores

Rusakov, KI (Autor) Outra; Gladyshchuk, AA (Autor) Outra; Rakovich, YP (Autor) Outra; Donegan, JF (Autor) Outra; Filonovich, SA (Autor) Outra; Gomes, MJM (Autor) Outra; Talapin, DV (Autor) Outra; Rogach, AL (Autor) Outra; Eychmuller, A (Autor) Outra

Revista

A Revista está pendente de validação pelos Serviços Administrativos.

Título: Optika i Spektroskopiya

Vol. 94

Páginas: 921-925

ISSN: 0030-4034

Indexação

Scopus - 11 Citações

Outras Informações

ID Authenticus: P-00F-H40

Abstract (EN): It is reported on the efficient photoluminescence (PL) up-conversion in CdSe/ZnS quantum dots (QDs) prepared by an organometallic approach. It is demonstrated that the efficiency of photon energy up-conversion and the magnitude of the spectral shift can be controlled: (i) by the thickness of the ZnS layers, (ii) by the temperature dependence of the excited state absorption coefficient, (iii) by the dependence on excitation intensity. From the analysis of the experimental data, it is proposed that intrinsic gap states are involved as intermediate states in the PL up-conversion rather than nonlinear two-photon absorption or Auger processes.

Idioma: Inglês

Tipo (Avaliação Docente): Científica