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Electroluminescence from a mixed red-green-blue colloidal quantum dot monolayer

Anikeeva, Polina O. and Halpert, Jonathan E. and Bawendi, Moungi G. and Bulovic, Vladimir (2007) Electroluminescence from a mixed red-green-blue colloidal quantum dot monolayer. NANO LETTERS, 7 (8). pp. 2196-2200.

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Official URL: http://pubs.acs.org/doi/full/10.1021/nl0703424

Abstract

We demonstrate light emitting devices (LEDs) with a broad spectral emission generated by electroluminescence from a mixed-monolayer of red, green, and blue emitting colloidal quantum dots (QDs) in a hybrid organic/inorganic structure. The colloidal QDs are reproducibly synthesized and yield high luminescence efficiency materials suitable for LED applications. Independent processing of the organic charge transport layers and the QD luminescent layer allows for precise tuning of the emission spectrum without changing the device structure, simply by changing the ratio of different color QDs in the active layer. Spectral tuning is demonstrated through fabrication of white QD-LEDs that exhibit external quantum efficiencies of 0.36% (Commission Internationale de I'Eclairage) coordinates of (0.35, 0.41) at video brightness, and color rendering index of 86 as compared to a 5500 K blackbody reference.

Item Type:Article
Uncontrolled Keywords:CADMIUM SELENIDE NANOCRYSTALS; LIGHT-EMITTING DEVICES; ENERGY-TRANSFER; FLUORESCENCE INTERMITTENCY; EMISSION; LUMINESCENCE; COMPOSITES
Subjects:Material Science > Functional and hybrid materials
ID Code:6193
Deposited By:IoN
Deposited On:10 Sep 2009 11:29
Last Modified:10 Sep 2009 11:29

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