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.
© 2011 Optical Society of America
Original Manuscript: December 2, 2010
Revised Manuscript: February 5, 2011
Manuscript Accepted: February 8, 2011
Published: May 13, 2011
Sedat Nizamoglu, Talha Erdem, and Hilmi Volkan Demir, "High scotopic/photopic ratio white-light-emitting diodes integrated with semiconductor nanophosphors of colloidal quantum dots," Opt. Lett. 36, 1893-1895 (2011)