Title :
Wavelength dependent color conversion of CdSe/ZnS core/shell nanocrystals for white LEDs
Author :
Nizamoglu, Sedat ; Demir, Hilmi Volkan
Author_Institution :
Nanotechnol. Res. Center, Bilkent Univ., Ankara, Turkey
Abstract :
In this paper we investigate spectrally resolved relative quantum efficiency and relative photon conversion efficiency of CdSe/ZnS core/shell nanocrystals. We study the optical absorbance, photoluminescence, spectral relative quantum efficiency and spectral relative photon conversion efficiency of red-emitting CdSe/ZnS core/shell nanocrystals with the amounts of 0.4, 0.8, 1.6 and 2.4 nmol quantum dots. We find out that both the average quantum efficiency and the average photon conversion efficiency of the nanocrystal film raise with the increasing photon excitation energy.
Keywords :
II-VI semiconductors; cadmium compounds; light emitting diodes; nanostructured materials; photoluminescence; semiconductor quantum dots; zinc compounds; CdSe-ZnS; color conversion; core-shell nanocrystals; light emitting diodes; optical absorbance; photoluminescence; quantum dots; relative photon conversion efficiency; relative quantum efficiency; Energy resolution; Light emitting diodes; Nanocrystals; Nanotechnology; Optical films; Optical pumping; Quantum dots; Stimulated emission; Wavelength conversion; Zinc compounds;
Conference_Titel :
LEOS Annual Meeting Conference Proceedings, 2009. LEOS '09. IEEE
Conference_Location :
Belek-Antalya
Print_ISBN :
978-1-4244-3680-4
Electronic_ISBN :
1092-8081
DOI :
10.1109/LEOS.2009.5343274