Tailoring Effect of Enhanced Local Electric Field From Metal Nanoparticles on Electroluminescence of Silicon-Rich Silicon Nitride
Tailoring Effect of Enhanced Local Electric Field From Metal Nanoparticles on Electroluminescence of Silicon-Rich Silicon Nitride
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DOI：
10.1109/jstqe.2013.2252001
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发表时间：
2013-03
影响因子：
4.9
通讯作者：
Feng Wang;Dongsheng Li;Deren Yang;D. Que
中科院分区：
文献类型：
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作者：
Feng Wang;Dongsheng Li;Deren Yang;D. Que
富硅氮化硅(SiNx)基发光器件(LED)的电致发光波长可通过调节纳米银颗粒的尺寸来实现。在我们的SiNx基LED中观察到两个电致发光峰，随着银纳米颗粒尺寸的增加，这两个峰都发生了红移。在一个简单模型的基础上，通过计算银纳米粒子周围的局域电场，给出了这一变化的合理解释。这两个电致发光峰的红移及其相对强度的演化主要是由于其电场强度随着纳米银颗粒尺寸的增大而减弱。我们的工作为制备具有可调EL波长的SiNx基LED提供了一种替代方法。
The electroluminescence (EL) wavelength tailoring of silicon-rich silicon nitride (SiNx)-based light-emitting devices (LEDs) is achieved by the modulation of the dimensions of Ag nanoparticles. Two EL peaks are observed in our SiNx-based LEDs, both of which are red shifted with the increasing sizes of Ag nanoparticles. A reasonable explanation on this shift is proposed from the calculation of the local electric field surrounding Ag nanoparticles based on a simple model. This red shift of the two EL peaks as well as the evolution of their relative intensities is mainly originated from its weakening electric field enhancement with the increase of the size of Ag nanoparticles. Our work provides an alternative approach toward the fabrication of SiNx-based LEDs with tunable EL wavelengths.