Electroluminescence from a mixed red-green-blue colloidal quantum dot monolayer
Electroluminescence from a mixed red-green-blue colloidal quantum dot monolayer
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DOI：
10.1021/nl0703424
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发表时间：
2007-08-01
期刊：
影响因子：
10.8
通讯作者：
Bulovic, Vladimir
中科院分区：
文献类型：
--
作者：
Anikeeva, Polina O.;Halpert, Jonathan E.;Bulovic, Vladimir
我们展示了具有宽光谱发射的发光器件（LED），所述宽光谱发射是由在混合有机/无机结构中的红色、绿色和蓝色发光胶体量子点（QD）的混合单层的电致发光产生的。胶体量子点可重复合成，并产生适用于LED应用的高发光效率材料。有机电荷传输层和QD发光层的独立处理允许在不改变器件结构的情况下，简单地通过改变活性层中不同颜色QD的比率来精确调谐发射光谱。光谱调谐通过制造白色QD-LED来证明，与5500 K黑体参考相比，QD-LED在视频亮度下表现出0.36%的外部量子效率（Commission Internationale de I 'Eclairage）坐标（0.35，0.41），以及86的显色指数。
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.