CdSe/ZnS Core-Shell System Enhance the Efficiency of the White Light Generation

Abdulla M. Suhail, Akeel Mehdi Kadim, Omar A. Ibrahim, Hind I. Murad
2012 Applied Physics Research  
The synthesis techniques of highly luminescent CdSe/ZnS core-shell composite nanocrystals are reported. The color-conversion, incorporating the photoluminescence emission of CdSe/ZnS core-shell nanocrystals in blue λ=350 nm and green λ=520 nm on near UV-InGaN/GaN LED λ=365 nm, was studied. The generated white light resulting from color-mixing of the emitted wavelengths of the core-shell composite and that of the near UV emission from the LED was analyzed depending upon the chromaticity
more » ... es. The X-ray diffraction pattern was used to study the CdSe/ZnS core-shell structure and the nanocrystal size formation. The absorption and photoluminescence spectra of the composite core-shell were investigated. The Gaussian fit was applied to the fluorescence spectrum of the CdSe/ZnS core-shell in order to determine the chromaticity coordinates of the output white light emitted on the chromaticity diagram.
doi:10.5539/apr.v4n1p57 fatcat:o542jsivvnacfds4etmxxwvjkq