Abstract
Trivalent lanthanide (Ln3+) ions doped semiconductor nanomaterials have recently attracted considerable attention owing to their distinct optical properties and their important applications in diverse fields such as optoelectronic devices, flat plane displays and luminescent biolabels. This review provides a comprehensive survey of the latest advances in the synthesis, electronic structures and optical spectra of Ln3+ ions in wide band-gap semiconductor nanocrystals (SNCs). In particular, we highlight the general wet-chemical strategies to introduce Ln3+ ions into host lattices, the local environments as well as the sensitization mechanism of Ln3+ in SNCs. The energy levels and crystal-field parameters of Ln3+ in various SNCs determined from energy-level-fitting are summarized, which is of vital importance to understanding the optical properties of Ln3+ ions in SNCs. Finally, some future prospects and challenges in this rapidly growing field are also proposed.
中文摘要
三价稀土离子掺杂半导体纳米晶具有独特的光学性能, 其在光电子器件、平板显示和荧光生物标记等方面的潜在应用前景,获得了人们的普遍关注. 本文从材料制备、光谱性能、电子能级结构及能量传递机理等几个方面系统总结了近年来稀土掺杂半导体纳米晶的最新研究进展. 本文重点综述了通过湿化学方法把稀土离子掺杂进入半导体纳米晶晶格位置的合成策略、稀土离子在半导体纳米晶中的格位分布及半导体纳米晶到稀土离子能量传递机理. 同时, 还总结了近年来通过能级拟合计算来探索稀土在半导体纳米晶中的能级结构和晶体场参数的工作. 这些方面的研究对于深入理解稀土掺杂半导体纳米晶的光物理具有重要意义. 最后, 针对稀土掺杂半导体纳米晶未来的发展趋势与努力的方向作了进一步的前景展望.
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Wenqin Luo earned his BSc degree in chemistry from Xiamen University in China (2002). He received his PhD (2010) in materials physics and chemistry from Fujian Institute of Research on the Structure of Matter (FJIRSM), CAS. He joined the faculty at Huzhou University in 2014. His research interest focuses on the chemical synthesis and optical spectroscopy of lanthanide-doped nanoparticles.
Yongsheng Liu was born in Shandong, China. He earned his BSc degree (2001) in chemistry from Shandong Normal University. He received his MSc (2007) and PhD (2010) degrees in physical chemistry from FJIRSM, CAS. He joined Prof. Xueyuan Chen’s group as an assistant professor in 2010 and was promoted to associate professor in 2012. Currently, his research interest focuses on the optical spectroscopy and bioapplications of lanthanide-doped nanomaterials.
Xueyuan Chen earned his BSc degree from the University of Science and Technology of China (1993) and his PhD degree from FJIRSM, CAS (1998). From 2001 to 2005, he was a postdoctoral research associate at the Chemistry Division of Argonne National Laboratory, US Department of Energy, where he studied the photophysics and photochemistry of heavy elements. In 2005, he joined the faculty at FJIRSM, where he is currently professor and group leader in material chemistry and physics. His research focuses on the chemistry, optical spectroscopy and bioapplications of lanthanide- doped luminescent nanomaterials.
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Luo, W., Liu, Y. & Chen, X. Lanthanide-doped semiconductor nanocrystals: electronic structures and optical properties. Sci. China Mater. 58, 819–850 (2015). https://doi.org/10.1007/s40843-015-0091-9
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DOI: https://doi.org/10.1007/s40843-015-0091-9