Song, Hongjoo and Lee, Seonghoon (2007) Red light emitting solid state hybrid quantum dot-near-UV GaN LED devices. NANOTECHNOLOGY, 18 (25).
|PDF - Published Version|
Official URL: http://www.iop.org/EJ/abstract/0957-4484/18/25/255...
We produced core–shell (CdSe)ZnSe quantum dots by direct colloidal chemical synthesis and the surface-passivation method—an overcoating of the core CdSe with a larger-bandgap material ZnSe. The (CdSe)ZnSe quantum dots(QDs) play the role of a colour conversion centre. We call these quantum dots nanophosphors. We fabricated red light emitting hybrid devices of (CdSe)ZnSe QDs and a near-UV GaN LED by combining red light emitting (CdSe)ZnSe quantum dots (as a colour conversion centre) with a near-UV(NUV) GaN LED chip (as an excitation source). A few good red phosphors have been known for UV excitation wavelengths, and red phosphors for UV excitation have been sought for a long time. Here we tested the possibility of using (CdSe)ZnSe QDs as red nanophosphors for UV excitation. The fabricated red light emitting hybrid device of (CdSe)ZnSe and a NUV GaN LED chip showed a good luminance. We demonstrated that the (CdSe)ZnSe quantum dots were promising red nanophosphors for NUV excitation and that a red LED made of QDs and a NUV excitation source was a highly efficient hybrid device.
|Subjects:||Physical Science > Nanoelectronics|
Physical Science > Quantum phenomena
Physical Science > Photonics
Engineering > Nanotechnology applications in ICT
|Deposited On:||14 Jan 2010 16:23|
|Last Modified:||14 Jan 2010 16:23|
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