- 期刊
Size Effect on the Photoluminescence Shift in Wide Band-Gap Material: A Case Study of SiO2-Nanoparticles
並列摘要
In this article, I will discuss the optical properties of SiO2-nanoparticles that we have investigated recently by photoluminescence (PL) spectroscopy. In particular, I will show the blue-shifts of PL, originating from the electron-hole recombination of the self-trapped exciton (STE), observed in smaller-sized SiO2-nanoparticles. To explain the size effect in relating to the STE PL shift, a question has been raised on whether it is appropriate to apply the quantum confinement (QC) theory usually used for the Mott-Wannier type excitons in semiconductors to wide band-gap material, such as silica. In this study, a laser-heating model of free excitons (FEs) to activate lattice phonons has been developed, rather than the QC effect, to interpret the blue-shifts of STE PL in smaller-sized SiO2-nanoparticles. The blue-shift of STE PL is actually resulted from phonon-assisted PL due to the thermalization of the SiO2-nanoparticle system during laser irradiation.
延伸閱讀
- Liu, Y. M., Li, M., Fang, Q. O., Lv, Q. R., Wu, M. Z., Sun, Z. Q., Song, X. P., & He, G. (2014). Synthesis, Photoluminescence, and Magnetic Properties of Arrayed Al Doped Zn 0.95Co 0.05O Nanorods. Chinese Journal of Physics, 52(1), 286-297. https://doi.org/10.6122/CJP.52.286
- Xie, D., Peng, H., Huang, S., & You, F. (2013). Core-Shell Structure in Doped Inorganic Nanoparticles: Approaches for Optimizing Luminescence Properties. Journal of Nanomaterials, 2013(), 290-299-534. https://doi.org/10.1155/2013/891515
- 李佳鴻（2016）。Optical Properties of SiO2 Nanosphere Opal Photonic Crystals Decorated with Self-assembled Ag Nano Chains〔碩士論文，國立中正大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0033-2110201614062158
- 陳頤專、張清志、黃其清（2010）。Synthesis of Zinc Oxide (ZnO) Nanoparticles Via a Wet Chemical Route and Their Photoluminescence Properties。化學，68(1)，69-75。https://doi.org/10.6623/chem.2010007
- Chien, T. Y., Chia, C. T., Lin, T. C., & Lee, S. C. (2008). Photoluminescence and Raman Studies of Nanocrystalline Silicon Enclosed in a SiO2 Shell. Chinese Journal of Physics, 46(1), 91-97. https://www.airitilibrary.com/Article/Detail?DocID=05779073-200802-46-1-91-97-a