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Applied Physics Letters / Volume 90 / Issue 3 / INTERDISCIPLINARY AND GENERAL PHYSICS

Appl. Phys. Lett. 90, 034107 (2007); http://dx.doi.org/10.1063/1.2433030 (3 pages)

Fabrication and characterization of red-emitting electroluminescent devices based on thiol-stabilized semiconductor nanocrystals

Cristina Bertoni1, Diego Gallardo1, Steve Dunn1, Nikolai Gaponik2, and Alexander Eychmüller2

1Nanotechnology Centre, Materials Department, School of Applied Sciences, Cranfield University, MK43 0AL, United Kingdom
2Physical Chemistry, TU Dresden, Bergstraße 66b, 01062 Dresden, Germany

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(Received 16 November 2006; accepted 17 December 2006; published online 19 January 2007)

Thiol-capped CdTe nanocrystals were used to fabricate light-emitting diodes, consisting of an emissive nanocrystal multilayer deposited layer by layer, sandwiched between indium tin oxide and aluminum electrodes. The emissive and electrical properties of devices with different numbers of nanocrystal layers were studied. The improved structural homogeneity of the nanocrystal multilayer allowed for stable and repeatable current- and electroluminescence-voltage characteristics. These indicate that both current and electroluminescence are electric-field dependent. Devices were operated under ambient conditions and a clear red light was detected. The best performing device shows a peak external efficiency of 0.51% and was measured at 0.35 mA/cm2 and 3.3 V.

© 2007 American Institute of Physics

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KEYWORDS and PACS

Keywords

cadmium compounds, II-VI semiconductors, nanostructured materials, light emitting diodes, electroluminescence, electroluminescent devices

PACS

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.2433030

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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    References

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