Abstract
Micro-pattern of Ag nanoparticles and Ag film is inserted between ZnCdO film and the substrate to enhance the photoluminescence (PL) of ZnCdO films, achieving enhancement ratio of 21.2 and 7.1, respectively. Time-resolved photoluminescence shows that the PL lifetime of Ag/ZnCdO films is longer than that of bare ZnCdO, which is attributed to surface modification and surface plasmons coupling. The improved enhancement in the sample with Ag pattern is attributed to the fact that periodic Ag structure offers additional scattering mediums and thus increases the light extraction efficiency.
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Acknowledgments
This work was supported by the Natural Science Foundation of China (Nos. 51172204, 91333203 and 51372223) and the Science and Technology Department of Zhejiang Province (No. 2010R50020). The authors are grateful to Dr. Yishi Wu (Institute of Chemistry, Chinese Academy of Sciences) for his assistance in TRPL measurements.
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Song, S., Sun, L., He, H. et al. Improving metal-enhanced photoluminescence by micro-pattern of metal nanoparticles: a case study of Ag–ZnCdO system. Appl. Phys. A 115, 1127–1132 (2014). https://doi.org/10.1007/s00339-014-8372-9
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DOI: https://doi.org/10.1007/s00339-014-8372-9