Bright and color-saturated emission from blue light-emitting diodes based on solution-processed colloidal nanocrystal quantum dots.
We report a multilayer solution-processed blue light-emitting diode based on colloidal core/shell CdS/ZnS nanocrystal quantum dots (QDs). At a low-operating voltage of 5.5 V, the device emits spectrally pure blue radiation at 460 nm with a narrow full-width-at-half-maximum bandwidth of 20 nm and high brightness up to 1600 cd/m2. Broad-band, long-wavelength emission from the polymer components and deep traps in the QDs are minimized to less than 5% of the total emission.
Tan
Zhanao
Z
Department of Engineering Science and Mechanics, Penn State University, University Park, PA 16802, USA.
Zhang
Fan
F
Zhu
Ting
T
Xu
Jian
J
Wang
Andrew Y
AY
Dixon
John D
JD
Li
Linsong
L
Zhang
Qi
Q
Mohney
Suzanne E
SE
Ruzyllo
Jerzy
J
D002104:Cadmium; D003102:Colloids; D003116:Color; D004563:Electrochemistry; D008027:Light; D049449:Luminescence; D053768:Metal Nanoparticles; D012996:Solutions; D013455:Sulfur; D015032:Zinc
D003102:Colloids; D012996:Solutions; D002104:Cadmium; D013455:Sulfur; D015032:Zinc