Blue‐Pumped Deep Ultraviolet Lasing from Lanthanide‐Doped Lu6O5F8 Upconversion Nanocrystals

Du, Yangyang; Wang, Yunfeng; Deng, Zhiqin; Chen, Xian; Yang, Xueqing; Sun, Tianying; Zhang, Xin; Zhu, Guangyu; Yu, Siu Fung; Wang, Feng

doi:10.1002/adom.201900968

Cited by 43 publications

(10 citation statements)

References 63 publications

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“…Intense excitation with a cost-effective blue wavelength of 450 nm is interesting for practical applications. This is possible by co-doping with Pr 3+ in huntite-type crystallizing YAl 3 (BO 3 ) 4 (YAB) 59 and upconversion into its 4f 1 5d 1 configuration 60 – 64 , followed by efficient energy transfer to the 6 I J’ ( J’ = 17/2…7/2) levels of Gd 3+ . Not only does this offer the possibility of background free upconversion thermometry, but it also bears potential for applications such as UV lasing 64 or visible light excited photocatalysis 65 combined with local temperature sensing.…”

Section: Introductionmentioning

confidence: 99%

“…This is possible by co-doping with Pr 3+ in huntite-type crystallizing YAl 3 (BO 3 ) 4 (YAB) 59 and upconversion into its 4f 1 5d 1 configuration 60 – 64 , followed by efficient energy transfer to the 6 I J’ ( J’ = 17/2…7/2) levels of Gd 3+ . Not only does this offer the possibility of background free upconversion thermometry, but it also bears potential for applications such as UV lasing 64 or visible light excited photocatalysis 65 combined with local temperature sensing. Similar visible-to-UV upconversion relying on triplet-triplet annihilation has otherwise been recently reported by Harada et al for metal-organic compounds 66 …”

Section: Introductionmentioning

confidence: 99%

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One ion to catch them all: Targeted high-precision Boltzmann thermometry over a wide temperature range with Gd3+

Zhang

et al. 2021

Light Sci Appl

110

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Ratiometric luminescence thermometry with trivalent lanthanide ions and their 4fn energy levels is an emerging technique for non-invasive remote temperature sensing with high spatial and temporal resolution. Conventional ratiometric luminescence thermometry often relies on thermal coupling between two closely lying energy levels governed by Boltzmann’s law. Despite its simplicity, Boltzmann thermometry with two excited levels allows precise temperature sensing, but only within a limited temperature range. While low temperatures slow down the nonradiative transitions required to generate a measurable population in the higher excitation level, temperatures that are too high favour equalized populations of the two excited levels, at the expense of low relative thermal sensitivity. In this work, we extend the concept of Boltzmann thermometry to more than two excited levels and provide quantitative guidelines that link the choice of energy gaps between multiple excited states to the performance in different temperature windows. By this approach, it is possible to retain the high relative sensitivity and precision of the temperature measurement over a wide temperature range within the same system. We demonstrate this concept using YAl3(BO3)4 (YAB):Pr3+, Gd3+ with an excited 6PJ crystal field and spin-orbit split levels of Gd3+ in the UV range to avoid a thermal black body background even at the highest temperatures. This phosphor is easily excitable with inexpensive and powerful blue LEDs at 450 nm. Zero-background luminescence thermometry is realized by using blue-to-UV energy transfer upconversion with the Pr3+−Gd3+ couple upon excitation in the visible range. This method allows us to cover a temperature window between 30 and 800 K.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

One ion to catch them all: Targeted high-precision Boltzmann thermometry over a wide temperature range with Gd3+

Zhang

et al. 2021

Light Sci Appl

110

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“…In ar ecent development, Wang and Yu demonstrated ac lass of blue-pumped microcavity lasers operating at 315 nm by using Lu 6 O 5 F 8 :Pr/Gd@Lu 6 O 5 F 8 upconversion nanocrystals as the gain medium. [42] Mechanistic investigations show that the upconversion process is ascribed to sequential absorption of two blue photons( 447 nm) by Pr 3 + ions followed by energy transfer to Gd 3 + ions.…”

Section: Lanthanide-doped Nanocrystalsmentioning

confidence: 99%

Lanthanide‐Based Luminescent Materials for Waveguide and Lasing

Cheng

Sun

Wang

2019

Chemistry An Asian Journal

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Microlasers and waveguidesh ave wide applications in the fields of photonics and optoelectronics. Lanthanide-dopedl uminescent materials featuring large Stokes/ anti-Stokess hift, long excited-state lifetime as well as sharp emission bandwidth are excellent opticalc omponents for photonic applications. In the past few years, great progress has been made in the designa nd fabrication of lanthanidebased waveguidesa nd lasers at the micrometer length scale. Waveguide structures and microcavities can be fabricated from lanthanide-doped amorphous materials through top-down process. Alternatively,l anthanide-doped organic compounds featuring large absorption cross-section can self-assemble into low-dimensional structures of well-defined size and morphology.I nr ecent years, lanthanide-doped crystalline structures displaying highly tunable excitation and emission properties have emergeda sp romising waveguide and lasing materials,w hichs ubstantially extends the range of lasing wavelength. In this minireview, we discussr ecent advances in lanthanide-based luminescentm aterials that are designed for waveguide and lasing applications.W ea lso attempt to highlight challenging problems of these materials that obstacle further development of this field.[a] Dr.

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“…Lanthanide-doped functional nanomaterials are widely studied due to their optical properties and broad application within such areas as the design of luminescent thermometers and photocatalysts, the development of sensors of biologically important substances and solar cells, single-molecule microscopy, solid-state lasers, and so on [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 ]. Such compounds allow making multifunctional materials through a combination of optical, magnetic, and other properties, which make them attractive and promising materials for theranostics.…”

Section: Introductionmentioning

confidence: 99%

Lanthanide-Ion-Doping Effect on the Morphology and the Structure of NaYF4:Ln3+ Nanoparticles

et al. 2022

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Two series of β-NaYF4:Ln3+ nanoparticles (Ln = La–Nd, Sm–Lu) containing 20 at. % and 40 at. % of Ln3+ with well-defined morphology and size were synthesized via a facile citric-acid-assisted hydrothermal method using rare-earth chlorides as the precursors. The materials were composed from the particles that have a shape of uniform hexagonal prisms with an approximate size of 80–1100 nm. The mean diameter of NaYF4:Ln3+ crystals non-monotonically depended on the lanthanide atomic number and the minimum size was observed for Gd3+-doped materials. At the same time, the unit cell parameters decreased from La to Lu according to XRD data analysis. The diameter-to-length ratio increased from La to Lu in both studied series. The effect of the doping lanthanide(III) ion nature on particle size and shape was explained in terms of crystal growth dynamics. This study reports the correlation between the nanoparticle morphologies and the type and content of doping lanthanide ions. The obtained results shed light on the understanding of intrinsic factors’ effect on structural features of the nanocrystalline materials.

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Blue‐Pumped Deep Ultraviolet Lasing from Lanthanide‐Doped Lu₆O₅F₈ Upconversion Nanocrystals

Cited by 43 publications

References 63 publications

One ion to catch them all: Targeted high-precision Boltzmann thermometry over a wide temperature range with Gd3+

One ion to catch them all: Targeted high-precision Boltzmann thermometry over a wide temperature range with Gd3+

Lanthanide‐Based Luminescent Materials for Waveguide and Lasing

Lanthanide-Ion-Doping Effect on the Morphology and the Structure of NaYF4:Ln3+ Nanoparticles

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