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Dye-sensitized lanthanide-doped upconversion nanoparticles
Chemical Society Reviews ( IF 40.4 ) Pub Date : 2017-06-16 00:00:00 , DOI: 10.1039/c7cs00053g Xindong Wang 1, 2, 3, 4, 5 , Rashid R. Valiev 6, 7, 8, 9, 10 , Tymish Y. Ohulchanskyy 11, 12, 13, 14, 15 , Hans Ågren 1, 2, 3, 4, 5 , Chunhui Yang 1, 2, 3, 4, 5 , Guanying Chen 1, 2, 3, 4, 5
Chemical Society Reviews ( IF 40.4 ) Pub Date : 2017-06-16 00:00:00 , DOI: 10.1039/c7cs00053g Xindong Wang 1, 2, 3, 4, 5 , Rashid R. Valiev 6, 7, 8, 9, 10 , Tymish Y. Ohulchanskyy 11, 12, 13, 14, 15 , Hans Ågren 1, 2, 3, 4, 5 , Chunhui Yang 1, 2, 3, 4, 5 , Guanying Chen 1, 2, 3, 4, 5
Affiliation
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Lanthanide-doped upconversion nanoparticles (UCNPs) are promising for applications as wide as biological imaging, multimodal imaging, photodynamic therapy, volumetric displays, and solar cells. Yet, the weak and narrow absorption of lanthanide ions poses a fundamental limit of UCNPs to withhold their brightness, creating a long-standing hurdle for the field. Dye-sensitized UCNPs are emerging to address this performance-limiting problem, yielding up to thousands-fold brighter luminescence than conventional UCNPs without dye sensitization. In their configuration, organic dyes with spectrally broad and intense absorption are anchored to the surface of UCNPs to harvest the excitation light energy, which is then transferred via Förster and/or Dexter mechanisms across the organic/inorganic interface to the lanthanides incorporated in UCNPs (with or devoid of a shell) to empower efficient upconversion. This tutorial review highlights recent progress in the development of dye sensitized UCNPs, with an emphasis on the theory of energy transfer, the geometric classification of the dye sensitized core and core/shell nanocrystals, and their emerging photonic and biophotonic applications. Opportunities and challenges offered by dye sensitized UCNPs are also discussed.
中文翻译：
染料敏化镧系元素掺杂的上转换纳米粒子
镧系元素掺杂的上转换纳米粒子（UCNPs）在生物成像，多峰成像，光动力疗法，体积显示和太阳能电池等应用中具有广阔的前景。但是，镧系元素离子的吸收较弱且较窄，这是UCNP不能保留其亮度的基本限制，这是该领域长期存在的障碍。染料敏化的UCNP正在解决这个性能受限的问题，与没有染料敏化的常规UCNP相比，其发光亮度提高了数千倍。在其配置中，具有广谱吸收和强吸收性的有机染料被固定在UCNP的表面上，以收集激发光能，然后将其通过跨有机/无机界面的Förster和/或Dexter机制与UCNP中掺入的镧系元素（有壳或无壳）的结合，以实现有效的上转换。本教程的重点介绍了染料敏化UCNPs的最新进展，重点是能量转移理论，染料敏化的核和核/壳纳米晶体的几何分类及其新兴的光子和生物光子应用。还讨论了染料敏化UCNP提供的机遇和挑战。
更新日期：2017-07-18
中文翻译：
染料敏化镧系元素掺杂的上转换纳米粒子
镧系元素掺杂的上转换纳米粒子（UCNPs）在生物成像，多峰成像，光动力疗法，体积显示和太阳能电池等应用中具有广阔的前景。但是，镧系元素离子的吸收较弱且较窄，这是UCNP不能保留其亮度的基本限制，这是该领域长期存在的障碍。染料敏化的UCNP正在解决这个性能受限的问题，与没有染料敏化的常规UCNP相比，其发光亮度提高了数千倍。在其配置中，具有广谱吸收和强吸收性的有机染料被固定在UCNP的表面上，以收集激发光能，然后将其通过跨有机/无机界面的Förster和/或Dexter机制与UCNP中掺入的镧系元素（有壳或无壳）的结合，以实现有效的上转换。本教程的重点介绍了染料敏化UCNPs的最新进展，重点是能量转移理论，染料敏化的核和核/壳纳米晶体的几何分类及其新兴的光子和生物光子应用。还讨论了染料敏化UCNP提供的机遇和挑战。
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