Hugely enhanced electroluminescence from mesoporous ZnO particles
Hugely enhanced electroluminescence from mesoporous ZnO particles
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DOI：
10.1016/j.optmat.2005.01.024
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发表时间：
2006-03
影响因子：
3.9
通讯作者：
Guang-hui Ning;Xiaopeng Zhao;J. Li;Changyu Zhang
中科院分区：
文献类型：
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作者：
Guang-hui Ning;Xiaopeng Zhao;J. Li;Changyu Zhang
以十八胺（ODA）和十二胺（DDA）为模板剂，采用溶胶-凝胶法合成了纳米多孔ZnO粒子。实验结果表明，用ODA、DDA和不加模板剂制备的ZnO的密度分别为5.31、5.37和5.42cm ~ 2/g。表面分析表明，经ODA和DDA处理后的ZnO颗粒具有多孔结构。在2-4.66V/μm的直流电场下，观察到多孔ZnO颗粒的荧光增强电致发光（EL）。在4.66V/μm电压下，与无孔结构的ZnO样品相比，经DDA和DDA处理的ZnO样品的发光强度分别提高了12倍和20倍。电致发光光谱主要表现为宽峰发射特征，峰值在556 nm处。阈值电压仅为2 V/μm。结果表明，ZnO颗粒中的多孔结构可以提高EL强度。
Using octadecylamine (ODA) and dodecylamine (DDA) as template, nanostructured porous ZnO particles were synthesized by sol–gel method. The results of experiments show that the density of ZnO processed with ODA, DDA and without template is 5.31, 5.37 and 5.42cm2/g respectively. The surface analysis proves that the ZnO particles processed with ODA and DDA hold porous structure. Hugely enhanced electroluminescence (EL) was observed from the porous ZnO particles under direct current electric field from 2–4.66V/μm. Comparing with the low emission intensity of the ZnO without porous structure, the emission intensity of the ZnO sample processed with DDA and DDA were enhanced 12 times and 20 times respectively at the voltage of 4.66V/μm. The EL spectrum shows mainly broad peak emission feature with a peak at 556nm. The threshold voltage is just 2V/μm. The results indicate that the porous structure in ZnO particles can enhance EL intensity.