title: Bright and color-saturated emission from blue light-emitting diodes based on solution-processed colloidal nanocrystal quantum dots.
abstract: 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.
authors.affiliation: Department of Engineering Science and Mechanics, Penn State University, University Park, PA 16802, USA.
authors.forename: Zhanao
authors.initials: Z
authors.lastname: Tan
authors.forename: Fan
authors.initials: F
authors.lastname: Zhang
authors.forename: Ting
authors.initials: T
authors.lastname: Zhu
authors.forename: Jian
authors.initials: J
authors.lastname: Xu
authors.forename: Andrew Y
authors.initials: AY
authors.lastname: Wang
authors.forename: John D
authors.initials: JD
authors.lastname: Dixon
authors.forename: Linsong
authors.initials: L
authors.lastname: Li
authors.forename: Qi
authors.initials: Q
authors.lastname: Zhang
authors.forename: Suzanne E
authors.initials: SE
authors.lastname: Mohney
authors.forename: Jerzy
authors.initials: J
authors.lastname: Ruzyllo
mesh_terms: D002104:Cadmium; D003102:Colloids; D003116:Color; D004563:Electrochemistry; D008027:Light; D049449:Luminescence; D053768:Metal Nanoparticles; D012996:Solutions; D013455:Sulfur; D015032:Zinc
chemical_list: D003102:Colloids; D012996:Solutions; D002104:Cadmium; D013455:Sulfur; D015032:Zinc