Up-conversion luminescence in LaF3:Ho3+via two-wavelength excitation for use in solar cells

Zhou, Jiajia; Deng, Jun; Zhu, Haomiao; Chen, Xueyuan; Teng, Yan; Jia, Hong; Xu, Shiqing; Qiu, Jianrong

doi:10.1039/c3tc31581a

Cited by 68 publications

(37 citation statements)

References 22 publications

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“…The fast or slow response of the modulating red UC fluorescence was observed by manipulating 1870 nm laser as C. W. or gating beam coupled simultaneously with 980 nm laser adjusted as gating or C. W. beam. Furthermore, the mechanism for this fast‐slow optical modulation was put insight into the dynamic evolution processes, which indicates the presence of differentiation of the speed of electrons populated fully in the excited state manipulated by various pumping methods . Significantly, the success of manipulating light we demonstrated here could potentially extend the operating range from red to mid‐infrared (MIR) windows, which provides powerful opportunities for novel all‐optical fiber data processing architectures in various optoelectronic fields.…”

Section: Introductionmentioning

confidence: 82%

“…Different approaches to optical modulators have been proposed, often based on fast and highly nonlinear media that would enable all‐optical switch devices, including 2D layered materials, high nonlinear responses materials with well‐engineered structures, and optomechanical and phase‐change metamaterials . However, to our best knowledge, there is no any report about utilizing rare earth (RE) ions to realize fast‐slow optical modulation . Theoretically, it is expected to develop a versatile physical strategy to realize fast‐slow optical modulation of up‐conversion (UC) fluorescence from RE ions, which can be tailored by simultaneous two‐wavelength excitation.…”

Section: Introductionmentioning

confidence: 99%

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Fast–Slow Red Upconversion Fluorescence Modulation from Ho³⁺‐Doped Glass Ceramics upon Two‐Wavelength Excitation

Chen

Cui

Kang

et al. 2016

Advanced Optical Materials

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indispensable, which is ubiquitous in photo nics and optoelectronics applications, such as optical interconnect, environmental monitoring, biosensing, medicine, secu rity, astronomical, and allfibertohome applications. [2,3] Unlike electrons, photons interact weakly with each other. [4] Therefore, an optical modulation requires the media tion of a physical system to produce effi cient photon-photon interactions. Dif ferent approaches to optical modulators have been proposed, often based on fast and highly nonlinear media that would enable alloptical switch devices, including 2D layered materials, [5] high nonlinear responses materials with wellengineered structures, [6] and optomechanical and phasechange metamaterials. [7] However, to our best knowledge, there is no any report about utilizing rare earth (RE) ions to realize fastslow optical modulation. [8,9] Theoretically, it is expected to develop a versatile physical strategy to realize fast slow optical modulation of upconversion (UC) fluorescence from RE ions, which can be tailored by simultaneous twowave length excitation. Among various RE ions, [10][11][12] owing to abun dant energy levels of Ho 3+ ions, it is convenient for us to realize fastslow optical modulation of red UC fluorescence from Ho 3+ ions by simultaneous twowavelength excitation at 1.0 and 2.0 µm lasers. What's more, tunable excitation and emission wavelengths are operating at nearinfrared (NIR) window or atThe control of one light field by another, ultimately at manipulating efficiently photon-photon interactions obsoleting traditional electronic interconnection approach, is an attractive area of research in the development of alloptical network information science. Herein, an exquisite physical strategy is introduced to realize fast-slow optical modulation of red upconversion (UC) fluorescence from Ho 3+ :LaF 3 nanocrystals embedded glass ceramics (GCs) tailoring by simultaneous two-wavelength excitation at 980 and 1870 nm laser. An optical modulation of more than 2500% of the red UC fluorescence intensity and a fast response with rise time of 230 µs and decay time of 66 µs as well as a slow response with rise time of 23 ms and decay time of 6.65 ms in the red UC fluorescence signal is shown. The dynamic evolution analysis and theoretical simulations suggest that this fast-slow optical modulation of red UC fluorescence is rooting from the presence of differentiation of the speed of electrons fully populated in the excited-state 5 I 7 regulated by various pumping tactics. The fast-slow optical modulation of red UC fluorescence from Ho 3+ -doped GCs, manipulating through two-wavelength excitation at 980 and 1870 nm laser, may find novel application in future all-optical fiber data processing in various optoelectronic fields.

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Section: Introductionmentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Fast–Slow Red Upconversion Fluorescence Modulation from Ho³⁺‐Doped Glass Ceramics upon Two‐Wavelength Excitation

Chen

Cui

Kang

et al. 2016

Advanced Optical Materials

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“…12,13 The modulation of the distance between lanthanide ions, enlarging the excitation field and tuning the local site symmetry around lanthanide ions are the common approaches to enhance the UC luminescence. 22,23 Due to the magneticÀoptical interaction, e.g. 22,23 Due to the magneticÀoptical interaction, e.g.…”

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confidence: 99%

Magnetic field modulated upconversion luminescence in NaYF₄:Yb,Er nanoparticles

et al. 2015

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Upconversion, an anti-Stokes process that converts two or more lower energy photons into a higher energy photon, has been paid growing attention due to its wide range of applications ranging from photonics to bioscience. This process, however, suffers from poor efficiency which strongly hampers its application and commercialization. We show here that the upconversion luminescence of NaYF 4 :Yb,Er nanoparticles can be modulated by the magnetic field and an enhancement of upconversion intensity by a factor of 2.5 is obtained at 20 T. The increased upconversion luminescence is interpreted in terms of enhanced energy transfer from Yb 3+ to Er 3+ and the enhanced non-radiative transition from 4 S 3/2 to 4 F 9/2 and 4 I 11/2 to 4 I 13/2 of Er 3+ ions. In addition, continuous spectral broadening and shift of f-f transitions with increasing magnetic field intensity are observed, which are ascribed to the Zeeman effect and the difference in the g factor of Zeeman levels. The resultsdemonstrated here may open a new gate towards the modulation of the excited state process by the magnetic field. † Electronic supplementary information (ESI) available: The experimental section for synthesizing and characterizing nanoparticles; magnetic field dependent transmission spectra at 975 nm for nanoparticles/PDMS composites; XRD patterns, TEM image, HRTEM image, energy level diagram for NaYF 4 :2%Er nanoparticles. See

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“…Upconversion is a non‐linear optical process which two or more low‐energy near infrared (NIR) photons are absorbed to generate a higher‐energy photon ,. Due to such unique anti‐Stocks luminescent property, lanthanide rare‐earth doped upconversion nanoparticles (UCNPs) exhibited great potential values in the past years in many application fields such as bio‐imaging, optical sensing, lasing, full‐color display, photo dynamic therapy, drug releasing, super‐resolution imaging and anti‐counterfeiting …”

Section: Introductionmentioning

confidence: 97%

Effects of Ce³⁺ Doping in Green-Red Emitting Upconversion Nanoparticles

2017

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Controlling the luminescence of the rare‐earth doped photon‐upconversion materials is of particular importance for their practical applications. One of the most effective strategies for tuning the luminescent spectra is introducing extra dopants into the system to change the local symmetry of the crystal or get involved in the photon‐upconversion process. In this work, completely opposite trends of green‐to‐red luminescent intensity ratio are observed when utilizing Ce3+ ions to manipulate emissions in Yb3+‐Ho3+ and Yb3+‐Er3+ doped upconversion nanoparticles. It is difficult to explain how the interaction happens between Ce3+ and Er3+ according to the 2‐photon red upconversion emission process in Yb3+‐Er3+ pair. We propose an explanation that the 5d state of Ce3+ is benefit for the increase of green‐to‐red luminescent ratio in Er3+. This work provides insight into mechanistic understanding of upconversion phenomena in nanoparticles and also enables exciting new opportunities of designing new materials for photonic applications.

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Up-conversion luminescence in LaF3:Ho3+via two-wavelength excitation for use in solar cells

Cited by 68 publications

References 22 publications

Fast–Slow Red Upconversion Fluorescence Modulation from Ho³⁺‐Doped Glass Ceramics upon Two‐Wavelength Excitation

Fast–Slow Red Upconversion Fluorescence Modulation from Ho³⁺‐Doped Glass Ceramics upon Two‐Wavelength Excitation

Magnetic field modulated upconversion luminescence in NaYF₄:Yb,Er nanoparticles

Effects of Ce³⁺ Doping in Green-Red Emitting Upconversion Nanoparticles

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Up-conversion luminescence in LaF3:Ho3+via two-wavelength excitation for use in solar cells

Cited by 68 publications

References 22 publications

Fast–Slow Red Upconversion Fluorescence Modulation from Ho3+‐Doped Glass Ceramics upon Two‐Wavelength Excitation

Fast–Slow Red Upconversion Fluorescence Modulation from Ho3+‐Doped Glass Ceramics upon Two‐Wavelength Excitation

Magnetic field modulated upconversion luminescence in NaYF4:Yb,Er nanoparticles

Effects of Ce3+ Doping in Green-Red Emitting Upconversion Nanoparticles

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Product

Resources

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Fast–Slow Red Upconversion Fluorescence Modulation from Ho³⁺‐Doped Glass Ceramics upon Two‐Wavelength Excitation

Fast–Slow Red Upconversion Fluorescence Modulation from Ho³⁺‐Doped Glass Ceramics upon Two‐Wavelength Excitation

Magnetic field modulated upconversion luminescence in NaYF₄:Yb,Er nanoparticles

Effects of Ce³⁺ Doping in Green-Red Emitting Upconversion Nanoparticles