Energy transfer in lanthanide upconversion studies for extended optical applications

2015 ◽  
Vol 44 (6) ◽  
pp. 1608-1634 ◽  
Author(s):  
Hao Dong ◽  
Ling-Dong Sun ◽  
Chun-Hua Yan
Keyword(s):  
Energy Transfer ◽  
Optical Applications ◽  
Upconversion Emissions

In this review, the various energy transfer pathways involved in lanthanide-related upconversion emissions are comprehensively discussed.

Tuning the upconversion luminescence of cubic KMnF3:Yb3+/Er3+ nanocrystals through inert lanthanide ion doping

2020 ◽  
Vol 8 (8) ◽  
pp. 2847-2851 ◽  
Author(s):  
Yunfei Shang ◽  
Shuwei Hao ◽  
Wei Shao ◽  
Tong Chen ◽  
Yuyan Zhu ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Energy Transfer ◽  
Upconversion Luminescence ◽  
Lanthanide Ion ◽  
Ion Doping ◽  
Optical Applications ◽  
Back Transfer ◽  
Upconversion Emissions ◽  
Structure Engineering ◽  
Local Crystal Structure

Efficient tailoring of upconversion emissions in conventional single red emitting KMnF3:Yb3+/Er3+ nanocrystals is achieved through local crystal structure engineering and the suppression of energy transfer as well as back transfer, which is of great significance for extended optical applications.

scholarly journals Nano-Crystallization of Ln-Fluoride Crystals in Glass-Ceramics via Inducing of Yb3+ for Efficient Near-Infrared Upconversion Luminescence of Tm3+

Nanomaterials ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 1033
Author(s):  
Jianfeng Li ◽  
Yi Long ◽  
Qichao Zhao ◽  
Shupei Zheng ◽  
Zaijin Fang ◽  
...  
Keyword(s):  
Crystal Structures ◽  
Near Infrared ◽  
Upconversion Luminescence ◽  
Glass Ceramics ◽  
Upconversion Emission ◽  
Ceramic Composites ◽  
Wide Range ◽  
Transmission Window ◽  
Optical Applications ◽  
Upconversion Emissions

Transparent glass-ceramic composites embedded with Ln-fluoride nanocrystals are prepared in this work to enhance the upconversion luminescence of Tm3+. The crystalline phases, microstructures, and photoluminescence properties of samples are carefully investigated. KYb3F10 nanocrystals are proved to controllably precipitate in the glass-ceramics via the inducing of Yb3+ when the doping concentration varies from 0.5 to 1.5 mol%. Pure near-infrared upconversion emissions are observed and the emission intensities are enhanced in the glass-ceramics as compared to in the precursor glass due to the incorporation of Tm3+ into the KYb3F10 crystal structures via substitutions for Yb3+. Furthermore, KYb2F7 crystals are also nano-crystallized in the glass-ceramics when the Yb3+ concentration exceeds 2.0 mol%. The upconversion emission intensity of Tm3+ is further enhanced by seven times as Tm3+ enters the lattice sites of pure KYb2F7 nanocrystals. The designed glass ceramics provide efficient gain materials for optical applications in the biological transmission window. Moreover, the controllable nano-crystallization strategy induced by Yb3+ opens a new way for engineering a wide range of functional nanomaterials with effective incorporation of Ln3+ ions into fluoride crystal structures.

Spectral and energy transfer in Bi3+–Ren+ (n = 2, 3, 4) co-doped phosphors: extended optical applications

2018 ◽  
Vol 20 (17) ◽  
pp. 11516-11541 ◽  
Author(s):  
Junpeng Xue ◽  
Xiangfu Wang ◽  
Jung Hyun Jeong ◽  
Xiaohong Yan
Keyword(s):  
Energy Transfer ◽  
Electronic Structures ◽  
Electronic Configuration ◽  
Oxidation States ◽  
Optical Applications ◽  
Co Doped

Bismuth with [Xe]4f145d106s26p3 electronic configuration is considered as ‘a wonder metal’ due to its diverse oxidation states and multi-type electronic structures.

scholarly journals Self-assembled graphene-based microfibers with eclectic optical properties

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Mahdi Ghamsari ◽  
Tayyebeh Madrakian ◽  
Abbas Afkhami ◽  
Mazaher Ahmadi
Keyword(s):  
Optical Properties ◽  
Free Standing ◽  
Mechanical And Electrical Properties ◽  
Near Ir ◽  
The Subject ◽  
Uv Visible ◽  
Self Assembled ◽  
Optical Applications ◽  
Upconversion Emissions ◽  
Tunable Interference

AbstractThe construction of graphene-based microfibers with reinforced mechanical and electrical properties has been the subject of numerous researches in recent years. However, the fabrication of graphene-based fibers with remarkable optical features still remains a challenge and has not been addressed so far. This paper aims to report a series of flexible self-assembled fibers, synthesized through a few-minute sonication of thermally oxidized graphene oxide nanosheets, so-called Nanoporous Over-Oxidized Graphene (NOG), in an acidic medium. These free-standing glassy fibers were classified into four distinct morphological structures and displayed a collection of intriguing optical properties comprising high transparency, strong birefringence, fixed body colorations (e.g. colorless, blue, green, and red), tunable interference marginal colorations, UV–visible-near IR fluorescence, and upconversion emissions. Moreover, they exhibited high chemical stability in strongly acidic, basic, and oxidizing media. The foregoing notable attributes introduce the NOG fiber as a promising candidate both for the construction of graphene-based photoluminescent textiles and the development of a wide variety of optical applications.

scholarly journals Laser power density dependent energy transfer between Tm^3+ and Tb^3+: tunable upconversion emissions in NaYF_4:Tm^3+,Tb^3+,Yb^3+ microcrystals

2016 ◽  
Vol 24 (23) ◽  
pp. 26307 ◽  
Author(s):  
Xiaojie Xue ◽  
Makhin Thitsa ◽  
Tonglei Cheng ◽  
Weiqing Gao ◽  
Dinghuan Deng ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Power Density ◽  
Laser Power ◽  
Laser Power Density ◽  
Density Dependent ◽  
Upconversion Emissions

scholarly journals Manipulation of Energy Transfer Processes in Nanochannels

2009 ◽  
Vol 2009 ◽  
pp. 1-9 ◽  
Author(s):  
André Devaux ◽  
Gion Calzaferri
Keyword(s):  
Energy Transfer ◽  
Large Scale ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Building Blocks ◽  
Large Scale Structures ◽  
Zeolite L ◽  
Supramolecular Organisation ◽  
Scale Structures ◽  
Optical Applications

The realisation of molecular assemblies featuring specific macroscopic properties is a prime example for the versatility of supramolecular organisation. Microporous materials such as zeolite L are well suited for the preparation of host-guest composites containing dyes, complexes, or clusters. This short tutorial focuses on the possibilities offered by zeolite L to study and influence Förster resonance energy transfer inside of its nanochannels. The highly organised host-guest materials can in turn be structured on a larger scale to form macroscopic patterns, making it possible to create large-scale structures from small, highly organised building blocks for novel optical applications.

scholarly journals Dynamics of the Green and Red Upconversion Emissions inYb3+-Er3+-CodopedY2O3Nanorods

2010 ◽  
Vol 2010 ◽  
pp. 1-8 ◽  
Author(s):  
O. Meza ◽  
L. A. Diaz-Torres ◽  
P. Salas ◽  
C. Angeles-Chavez ◽  
A. Martínez ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Excellent Agreement ◽  
Upconversion Emission ◽  
Nonradiative Energy Transfer ◽  
Transfer Model ◽  
Solvent Ratio ◽  
Upconversion Emissions ◽  
Transfer Mechanisms ◽  
Energy Transfer Model ◽  
Experimental Decay

Efficient green and red upconversion emission inY2O3:Yb3+,Er3+nanorods under 978 nm radiation excitation is achieved. Experimental effective lifetimes, luminescent emissions, and nanorod sizes depend strongly on the solvent ratios used during the synthesis. A microscopic nonradiative energy transfer model is used to approach the dynamics of the green, red, and infrared emissions. The excellent agreement between simulated and experimental decay suggests that the energy transfer mechanisms responsible of the visible emission depend on the solvent ratio.

Concentration Dependent Luminescence and Energy Transfer Properties of Samarium Doped LLSZFB Glasses

2019 ◽  
Vol 9 (2) ◽  
pp. 110-122 ◽  
Author(s):  
Gudelly Anjaiah ◽  
Thammisetty Sasikala ◽  
Puram Kistaiah
Keyword(s):  
Energy Transfer ◽  
Optical Absorption ◽  
Rare Earth Ions ◽  
Oscillator Strengths ◽  
Luminescence Properties ◽  
Luminescence Spectra ◽  
Energy Transfer Mechanism ◽  
Absorption Bands ◽  
Optical Applications ◽  
Quenching Method

Background: Recently, great importance has been devoted to borate glass systems doped with rare-earth ions because of their unique peculiar properties in the field of photonics for optical applications. Objective: The purpose of the present study is to investigate the effect of concentration of Sm3+ ions on the luminescence properties of lead fluoroborate glasses through the energy transfer mechanism. Materials and Methods: Samarium doped lead fluoroborate glasses with chemical composition 20PbF2 .10Li2O .5SrO .5ZnO. (60-x) B2O3. xSm2O3 (where x = 0.1, 0.5, 1.0, 1.5 and 2.0 mol %) were prepared by means of melt quenching method. The concentration dependent luminescence properties were investigated in detail from the optical absorption, photoluminescence and decay analysis. Judd-Ofelt (J-O) theory was applied to analyze the optical absorption spectra. The experimental oscillator strengths of absorption bands have been used to determine the J-O parameters. Using the J-O parameters Ωλ (λ = 2, 4 and 6) and luminescence data several radiative parameters were obtained. Results: From the luminescence spectra, it was noticed that luminescence quenching starts at higher concentrations of Sm3+ ions (x ≥ 0.5 mol %). The decay curves of 4G5/2 → 6H7/2 transition exhibit a single exponential at lower dopant concentrations (x= 0.1 and 0.5 mol %) and non-exponential at higher concentrations (x ≥ 1 mol %). The concentration quenching was attributed to the energy transfer through the cross-relaxation between Sm3+ ions. The non-exponential curves were well fitted to Inokuti-Hirayama model for S = 6, indicating that the energy transfer between Sm3+ - Sm3+ ions is of dipole-dipole type. The calculated color coordinates of the as-prepared glasses fall within the reddish-orange region of the CIE diagram. Conclusion: All the experimental results indicate that the 0.5 mol% Sm3+ ions doped LLSZFB glass can be a possible choice for solid state lighting and display applications.

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