High scotopic/photopic ratio white-light-emitting diodes integrated with semiconductor nanophosphors of colloidal
Sedat Nizamoglu1, Talha Erdem, Hilmi Volkan Demir
1Department of Electrical and Electronics Engineering, Department of Physics, and UNAM—Institute of Materials Science and Nanotechnology, Bilkent University, Ankara, Turkey 06800.
Optics Letters
|May 20, 2011
Abstract:
We propose and demonstrate single-chip white-light-emitting diodes (WLEDs) integrated with semiconductor nanophosphors of colloidal quantum dots for high scotopic/photopic (S/P) ratio. These color conversion WLEDs achieve S/P ratios over 3.00, which exceeds the current limit of 2.50 in common lighting technologies, while sustaining sufficient levels of color rendering index.


