Up-conversion luminescence via a below-gap state in CdSe/ZnS quantum dots

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

Authors

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

Title: PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES

Vol. 17

Pages: 99-100

ISSN: 1386-9477

Indexing

ISI Web of Knowledge - 18 Citations

Scopus - 24 Citations

Other information

Authenticus ID: P-000-H96

DOI: 10.1016/s1386-9477(02)00712-9

Abstract (EN): We report on the efficient photoluminescence up-conversion in colloidally-prepared core-shell CdSe/ZnS quantum dots. We demonstrate that the efficiency of photon energy up-conversion and the magnitude of the spectral shift can be controlled by the thickness of the ZnS shell, the temperature and the excitation intensity. Based on the analysis of the experimental data we propose that intrinsic gap states are involved in the photoluminescence up-conversion as intermediate states rather than nonlinear two-photon absorption or Auger processes.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 2