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

被引：377

作者：

Anikeeva, Polina O.

Halpert, Jonathan E.

Bawendi, Moungi G. ^{[1
]}

Bulovic, Vladimir

机构：

[1] MIT, Dept Elect Engn & Comp Sci, Lab Organ Opt & Elect, Cambridge, MA 02139 USA

[2] MIT, Dept Chem, Cambridge, MA 02139 USA

来源：

NANO LETTERS | 2007年 / 7卷 / 08期

关键词：

D O I：

10.1021/nl0703424

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

收藏

页码：2196 / 2200

页数：5

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