White light-emitting diodes based on ultrasmall CdSe nanocrystal electroluminescence.
We report white light-emitting diodes fabricated with ultrasmall CdSe nanocrystals, which demonstrate electroluminescence from a size of nanocrystals (<2 nm) previously thought to be unattainable. These LEDs have excellent color characteristics, defined by their pure white CIE color coordinates (0.333, 0.333), correlated color temperatures of 5461-6007 K, and color rendering indexes as high as 96.6. The effect of high voltage on the trap states responsible for the white emission is also described.
Schreuder
Michael A
MA
Department of Chemistry, Vanderbilt University,Station B 351824, Nashville, Tennessee 37235, USA.
Xiao
Kai
K
Ivanov
Ilia N
IN
Weiss
Sharon M
SM
Rosenthal
Sandra J
SJ
D019187:Cadmium Compounds / Q000737:chemistry*; D003460:Crystallization; D004563:Electrochemistry / Q000379:methods*; D004867:Equipment Design; D008027:Light; D049449:Luminescence; D053758:Nanoparticles / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods*; D018036:Selenium Compounds / Q000737:chemistry*; D013696:Temperature
D019187:Cadmium Compounds; D018036:Selenium Compounds; C058667:cadmium selenide