Fine structure on the excitonic emission in AgI nanoparticles embedded in silica glass |
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| Authors: | Haiping He Zhizhen Ye |
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| Institution: | a State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, PR China
b Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, PR China |
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| Abstract: | Stable photoluminescence (PL) from AgI nanoparticles embedded in silica glass was investigated at room temperature. The Z1,2 excitonic emission of AgI exhibits fine structure with spacing of ∼0.20 eV (1610 cm−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 4.35 eV associated with AgI-silica interaction. We suggest that the excitons in AgI are localized in the AgI/SiO2 interface region before radiative recombination. |
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| Keywords: | 78 55 &minus m 81 20 &minus Fw |
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