Up-conversion luminescence in colloidal CdTe nanocrystals

• Type: Article in International Conference Proceedings Book
• Date: 2003

Authors

Filonovich, SA (Author) Other; Gomes, MJM (Author) Other; Rakovich, YP (Author) Other; Donegan, JF (Author) Other; Talapin, DV (Author) Other; Gaponik, NP (Author) Other; Rogach, AL (Author) Other; Eychmuller, A (Author) Other

Conference proceedings International

Title: MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS

Pages: 157-162

Symposium on Progress in Semiconductors II - Electronic and Optoelectronic Applications

BOSTON, MA, DEC 02-05, 2002

Indexing

Scopus - 7 Citations

Other information

Authenticus ID: P-007-ASK

Abstract (EN): We report on the efficient photoluminescence up-conversion in colloidally synthesized CdTe nanocrystals. We demonstrate that the efficiency of photon energy up-conversion and magnitude of spectral shift can be controlled: (i) by the size of the nanocrystals: (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 we can suggest that intrinsic gap states are involved as intermediate states in the photoluminescence up-conversion rather than nonlinear two-photon absorption or Auger processes.

Language: English

Type (Professor's evaluation): Scientific