Two-color size-tunable (1100-1600 nm) quantum dot nanocrystal electroluminescent devices

Author

Bakueva, Ludmila ; Konstantatos, Gerasimos ; Levina, Larissa ; Sargent, Edward H.

Author_Institution

Dept. of Electr. & Comput. Eng., Toronto Univ., Ont., Canada

fYear

2004

fDate

16-19 Aug. 2004

Firstpage

16

Lastpage

18

Abstract

Light-emitting structures containing PbS nanocrystals of two different sizes were fabricated and investigated. They demonstrate light emission in two distinct infrared frequency bands, or alternatively across a wide frequency band, each in the spectral region 1.1-1.6 μm. For two-color structures the relative intensity of peaks can be varied in a wide interval depending on the conditions of excitation. The intensity of electroluminescence reached values corresponding to internal efficiency up to 3.1%.

Keywords

IV-VI semiconductors; electroluminescent devices; lead compounds; nanostructured materials; semiconductor quantum dots; 1.1 to 1.6 micron; 1100 to 1600 nm; PbS; PbS nanocrystals; electroluminescence intensity; infrared frequency bands; light emission; light-emitting structures; quantum dot nanocrystal electroluminescent devices; relative intensity; two color size tunable quantum dot; wide frequency band; Absorption; Electroluminescent devices; Fabrication; Frequency; Infrared spectra; Nanocrystals; Photonic band gap; Polymers; Quantum dots; US Department of Transportation;

fLanguage

English

Publisher

ieee

Conference_Titel

Nanotechnology, 2004. 4th IEEE Conference on

Print_ISBN

0-7803-8536-5

Type

conf

DOI

10.1109/NANO.2004.1392234

Filename

1392234