Low-lying excited state energy trap induced by cross-relaxation – The main origin of concentration quenching in lanthanide upconversion nanoparticles

Huang, Fuhua; Bagheri, Niusha; Wang, Li; Ågren, Hans; Zhang, Jinglai; Widengren, Jerker; Liu, Haichun

doi:10.1016/j.jallcom.2022.168149

Cited by 7 publications

(1 citation statement)

References 24 publications

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“…UCNPs convert photons in the near-infrared (NIR) region into higher energy photons, in this case, within the visible or ultraviolet spectral window. 7 In particular, the NaGdF 4 composition appears as one of the most used host for designing UCNPs. This is not fortuitous since NaGdF 4 displays low lattice phonon frequency (<300 cm −1 ), which decreases the contribution of multiphonon relaxations, while also presenting desirable thermal and chemical stability and easy synthesis.…”

Section: Introductionmentioning

confidence: 99%

Eu^III and Tb^III upconversion intermediated by interparticle energy transfer in functionalized NaLnF₄ nanoparticles

Nunes Coelho,

Bispo-Jr,

de Oliveira

et al. 2024

Nanoscale

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Section: Introductionmentioning

confidence: 99%

Eu^III and Tb^III upconversion intermediated by interparticle energy transfer in functionalized NaLnF₄ nanoparticles

Nunes Coelho,

Bispo-Jr,

de Oliveira

et al. 2024

Nanoscale

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Photothermal lanthanide nanomaterials: From fundamentals to theranostic applications

Li,

Gong,

et al. 2024

BMEMat

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Photothermal lanthanide nanomaterials with unique photophysical properties have been innovatively explored for diagnostics and non‐invasive therapies, and hold great promise for precision theranostics. In this review, we start from the basic principles of excited‐state dynamics and provide a thorough comprehension of the main pathways for photothermal conversion in lanthanide nanocrystals. Aspects influencing the photothermal effect such as lanthanide‐doping concentration, particle size, and crystal structure have been fully discussed. Hybrid strategies for the design of efficient lanthanide‐based photothermal agents, including dye sensitization to break the absorption limit and semiconductor combination to add cross‐relaxation pathways, have also been summarized. Furthermore, we highlight the cutting‐edge applications of photothermal lanthanide nanoplatforms with optical diagnosis and temperature feedback in photothermia‐associated theranostics. Lastly, the current challenges and future eﬀorts for clinical applications are proposed. This review is expected to offer a better understanding of photothermal mechanisms and inspire efforts for designing versatile lanthanide theranostic nanoplatforms.

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Manipulation of Upconversion Luminescence in Heavily Lanthanide‐Doped Halide Double Perovskites for Optical Information Storage

Tang,

Zhou,

et al. 2024

Laser & Photonics Reviews

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Upconversion (UC) process involves diverse energy levels and photoluminescence modes, however, it faces the challenge of concentration quenching of the doped lanthanide ions with multiple luminescence centers. Herein, Yb3+/Ho3+ and Yb3+/Tm3+ are heavily codoped into the lead‐free halide double perovskite single crystal Cs2NaErCl6, enabling the controlled energy transfer UC process, and accordingly, the UC materials exhibit anti‐concentration‐quenching owing to the defect tolerance characters. Depending on different doping couples, the UC materials show green and red emissions under the 980 nm laser excitations. Moreover, the green‐to‐red emission ratio in Yb3+/Tm3+ codoped Cs2NaErCl6 changes dynamically with the increasing pumping intensity due to the different sensitivities of the excited energy levels. This study provides a renewed direction of the lanthanide ions heavily‐doped halide double perovskites toward UC materials and facilitates the development of new smart luminescence materials for optical information storage applications.

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Low-lying excited state energy trap induced by cross-relaxation – The main origin of concentration quenching in lanthanide upconversion nanoparticles

Cited by 7 publications

References 24 publications

Eu^III and Tb^III upconversion intermediated by interparticle energy transfer in functionalized NaLnF₄ nanoparticles

Eu^III and Tb^III upconversion intermediated by interparticle energy transfer in functionalized NaLnF₄ nanoparticles

Photothermal lanthanide nanomaterials: From fundamentals to theranostic applications

Manipulation of Upconversion Luminescence in Heavily Lanthanide‐Doped Halide Double Perovskites for Optical Information Storage

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Low-lying excited state energy trap induced by cross-relaxation – The main origin of concentration quenching in lanthanide upconversion nanoparticles

Cited by 7 publications

References 24 publications

EuIII and TbIII upconversion intermediated by interparticle energy transfer in functionalized NaLnF4 nanoparticles

EuIII and TbIII upconversion intermediated by interparticle energy transfer in functionalized NaLnF4 nanoparticles

Photothermal lanthanide nanomaterials: From fundamentals to theranostic applications

Manipulation of Upconversion Luminescence in Heavily Lanthanide‐Doped Halide Double Perovskites for Optical Information Storage

Contact Info

Product

Resources

About

Eu^III and Tb^III upconversion intermediated by interparticle energy transfer in functionalized NaLnF₄ nanoparticles

Eu^III and Tb^III upconversion intermediated by interparticle energy transfer in functionalized NaLnF₄ nanoparticles