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

• Type: Article in International Scientific Journal
• Date: 2003

Authors

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

Journal

The Journal is awaiting validation by the Administrative Services.

Title: Optika i Spektroskopiya

Vol. 94

Pages: 921-925

ISSN: 0030-4034

Indexing

Scopus - 11 Citations

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific