CdSe nanocrystals were prepared by a colloidal chemical approach using CdO and Se powder as precursors in an organic system of TOPO/TOP, and a multilayered electroluminescence device was fabricated with CdSe as emitti...CdSe nanocrystals were prepared by a colloidal chemical approach using CdO and Se powder as precursors in an organic system of TOPO/TOP, and a multilayered electroluminescence device was fabricated with CdSe as emitting layer. The results show that the photoluminescence spectra of the CdSe nanocrystals almost cover the whole visible region and the full width at half maximum （FWHM） is appropriately 200 nm. The electroluminescence spectrum of the multilayered device at different voltages was investigated. The electroluminescence intensity is enhanced with increasing operating voltage, and the CIE coordinates of the device change from （0.3,0.37） at 6 V to （0. 44,0. 46）at 20 V as the operating voltage increases,which indicates that the colors of the device could be tuned by the operatina voltage.展开更多
基金Supported by the National Natural Science Foundation of China( No.90301004 ,No.10434030 and No.60406005)the"973"National Key Basic Research Special Foundation of China ( No.2003CB314707) the NewStar Programfor Science and Technol-ogy of Beijing City(No.2004B10)
文摘CdSe nanocrystals were prepared by a colloidal chemical approach using CdO and Se powder as precursors in an organic system of TOPO/TOP, and a multilayered electroluminescence device was fabricated with CdSe as emitting layer. The results show that the photoluminescence spectra of the CdSe nanocrystals almost cover the whole visible region and the full width at half maximum （FWHM） is appropriately 200 nm. The electroluminescence spectrum of the multilayered device at different voltages was investigated. The electroluminescence intensity is enhanced with increasing operating voltage, and the CIE coordinates of the device change from （0.3,0.37） at 6 V to （0. 44,0. 46）at 20 V as the operating voltage increases,which indicates that the colors of the device could be tuned by the operatina voltage.
