Fine structure on the excitonic emission in AgI nanoparticles embedded in silica glass

Fine structure on the excitonic emission in AgI nanoparticles embedded in silica glass
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嵌入石英玻璃的 AgI 纳米粒子激子发射的精细结构

DOI:
10.1016/j.jlumin.2006.01.365
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发表时间:
2007-05
影响因子:
3.6
通讯作者:
Ye, Zhizhen
Ye, Zhizhen
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
He, Haiping;Wang, Yuxia;Ye, Zhizhen

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在室温下研究了镶嵌在石英玻璃中的碘化银纳米粒子的稳定光致发光。AgI的Z1,2激子发射具有精细结构,间距为1610 cm-1,这是界面水物种的振动频率。PL激发光谱显示两个新观察到的带在3.45和4.35eV与AgI-二氧化硅相互作用。我们认为AgI中的激子在辐射复合前是局域在AgI/SiO2界面区的。
Stable photoluminescence (PL) from AgI nanoparticles embedded in silica glass was investigated at room temperature. The Z1,2excitonic emission of AgI exhibits fine structure with spacing of ∼0.20eV (1610cm−1), which is assigned to the frequency of vibration in interfacial water species. The PL excitation spectrum displays two newly observed bands at 3.45 and 4.35eV associated with AgI–silica interaction. We suggest that the excitons in AgI are localized in the AgI/SiO2interface region before radiative recombination.
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