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Pàgina inicial > Articles > Articles publicats > Cathodoluminescence and photoluminescence of highly luminescent CdSe/ZnS quantum dot composites |
Data: | 1997 |
Resum: | We report room-temperature cathodoluminescence and photoluminescence spectra originating from ZnS overcoated CdSenanocrystals, 33 and 42 Å in diameter, embedded in a ZnS matrix. The thin-filmquantum dot composites were synthesized by electrospray organometallic chemical vapor deposition. Cathodoluminescence and photoluminescence are dominated by the sharp band-edge emission characteristic of the initial nanocrystals. The emission wavelength can be tuned in a broad window (470-650 nm) by varying the size of the dots. The cathodoluminescence intensity depends on the crystallinity of the ZnS matrix and the voltage and current density applied. |
Drets: | Tots els drets reservats. |
Llengua: | Anglès |
Document: | Article ; recerca ; Versió publicada |
Matèria: | II-VI semiconductors ; Cathodoluminescence ; Photoluminescence ; Quantum dots ; Nanocrystals ; Current density ; Organometallic chemical vapor deposition ; Thin film composition ; Thin film deposition |
Publicat a: | Applied physics letters, Vol. 70, Num. 16 (April 1997) , p. 2132-2134, ISSN 1077-3118 |
4 p, 327.1 KB |