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化学进展  2012 

基于纳米ZnO的白光LED

, PP. 1477-1483

Keywords: 白光LED,ZnO,电致发光,光致发光

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Abstract:

白光发光二极管被誉为第4代照明光源。ZnO纳米结构因含有大量本征和/或非本征缺陷使其除出现在紫外区域的带边发射外还能产生覆盖400-700nm可见光范围的深能级发光,从而可用于白光LED。本文系统地介绍了将ZnO纳米结构应用于白光LED的几种器件构造,并评述了各自的性能特点和研究进展。因为直接基于ZnO纳米结构电致发光的白光LED需要施加较高的偏压,所以将ZnO纳米结构与p型半导体复合制成异质结成为了研究的热点。ZnO纳米结构的制备方法和形貌特性会影响白光LED性能,对ZnO纳米结构进行掺杂是提升性能的重要手段。此外,将ZnO纳米材料和聚合物的优点集于一体的ZnO/聚合物异质结构也在白光LED中具有广阔的发展空间。最后,指出了纳米ZnO在白光LED应用中存在的问题和今后的发展方向。

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