The distribution of rare earth ions in a γ-Ga<sub>2</sub>O<sub>3</sub> nanocrystal-silicate glass composite and its influence on the photoluminescence properties

Gao, Zhigang; Lu, Xiaosong; Chu, Yushi; Guo, Shu; Liu, Lu; Liu, Yinyao; Sun, Shiyu; Ren, Jing; Yang, Jun

doi:10.1039/c8tc00325d

Cited by 30 publications

(27 citation statements)

References 39 publications

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“…The enrichment of Zn 2+ , Ga 3+ , Yb 3+ (Figure B), and Ni 2+ (Figure D) in the NCs is clearly seen, whereas the NCs are slightly poor in Ge 4+ . The result agrees with our recent observation that Yb 3+ prefers to partition in the nanospinels rather than accumulating at the interfaces between the NCs and the surrounding glass matrix …”

Section: Resultssupporting

confidence: 93%

“…Meanwhile, the PL intensity of the GC also becomes weaker than that of the PG (Figure ). The decreases in the oscillator strength and PL intensity in the GC may be related to the fact: if Yb 3+ also substitutes for the octahedrally coordinated Ga 3+ sites in the ZGGO NCs, its ligand field possesses an inversion center, akin to the case of Er 3+ in the γ‐Ga 2 O 3 NCs, and thus experiences weak electric‐dipole transitions according to the parity selection rules.…”

Section: Resultsmentioning

confidence: 99%

“…It should be noted that the decay of the Yb 3+ emission in the GC can be well fitted only by a double‐exponential function (Figure D), which means that there exit at least two kinds of Yb 3+ emitting centers in the GC. Since the partition efficiency of Yb 3+ in NCs cannot reach 100%, it is then understandable that only a certain amount Yb 3+ is doped into the NCs while the left remain in the glass matrix. Obviously, they experience different chemical environments.…”

Section: Resultsmentioning

confidence: 99%

“…In fact, many previous studies were based on the assumption that RE ions stay in the glassy phase (GP) rather than partitioning in the thermally grown nanospinels. However, our recently studies provided clear evidence that RE ions accumulate preferentially in the embedded nanospinels (eg, γ‐Ga 2 O 3 ), and perhaps more interestingly the doping efficiency of RE ions in the nanospinels depends on the ionic radius of the RE ion dopants . The simultaneous partitioning of TM and RE ions in the embedded nanospinels imposes a strong influence on the ET processes occurring between the dopants, such that the PL functions can be tailored in demand …”

Section: Introductionmentioning

confidence: 92%

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Correlation between ultrabroadband near‐infrared emission and Yb³⁺/Ni²⁺ dopants distribution in highly transparent germanate glass‐ceramics containing zinc gallogermanate nanospinels

Gao

Zhang

et al. 2018

J Am Ceram Soc

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The photoluminescence properties of dopants are strongly correlated with their distributions in host phosphors, the knowledge of which, however, is not well established yet. In this paper, the distribution of the active dopants, for example, trivalent ytterbium (Yb3+) and bivalent nickel (Ni2+) in a highly transparent germanate glass‐ceramic containing thermally grown Zn1+xGa2−2xGexO4 (0 ≤ x ≤ 1) nanospinels, is revealed by an analytical transmission electron microscope. The elemental mapping and linescan analysis confirm that both Yb3+ and Ni2+ accumulate preferentially in the germanium‐substituted ZnGa2O4 nanospinels embedded in the glass. The influence of glass crystallization on the electric transition properties of Yb3+ is presented. An enhanced ultrabroadband near infrared emission of Ni2+ is observed as a result of efficient energy transfer from Yb3+ to Ni2+ accumulated in the nanocrystals. Discussions are given to account for the detailed mechanisms of the efficient energy transfer occurring between the dopants.

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Section: Resultssupporting

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 92%

See 2 more Smart Citations

Correlation between ultrabroadband near‐infrared emission and Yb³⁺/Ni²⁺ dopants distribution in highly transparent germanate glass‐ceramics containing zinc gallogermanate nanospinels

Gao

Zhang

et al. 2018

J Am Ceram Soc

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“…[4][5][6][7] The past decades have witnessed great benefits from the richness in light-gain glasses for a diverse range of applications, for example, optical sensing, solid state display, light emitting diodes (LEDs), biological imaging, and lasing, and so on. [4][5][6][7] The past decades have witnessed great benefits from the richness in light-gain glasses for a diverse range of applications, for example, optical sensing, solid state display, light emitting diodes (LEDs), biological imaging, and lasing, and so on.…”

mentioning

confidence: 99%

Topological Engineering of Photoluminescence Properties of Bismuth‐ or Erbium‐Doped Phosphosilicate Glass of Arbitrary P₂O₅ to SiO₂ Ratio

Chu

Zhang

et al. 2018

Advanced Optical Materials

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research to applied industrial and social applications including but certainly not limited to window glasses, windscreens, kitchen cooktops, microscope and telescope lens, and optics, and so on, owing to such unmatched and outstanding properties as ease of large-scale and complex shape production as well as chemical and mechanical durability. [1] However, glasses, usually made by the traditional melt-quenching method viz., cooling a viscous liquid fast enough to avoid crystallization (known as supercooling), [2] are seriously constrained to those that entail an acceptable degree of glass-forming ability unless otherwise being made under extremely harsh conditions (e.g., superfast cooling or high-energy irradiation, etc.) that are not readily available to ordinary glass-making labs and factories. [3] This leads to a significantly limited range of available constituents and functions of the obtained glasses. For example, spectroscopic features of active dopants (e.g., rare-earth (REs) ions, transition, and main group metals) are closely associated with their chemical states and the surrounding chemical environments provided by the glass host; hence, it is possible to induce new photoluminescence (PL) functions such as ultrabroadband and enhanced up-/down-conversion emissions via proper doping, post thermal, and magnetic treatments or A new method is reported to achieve the manufacture of glass of arbitrary ratio of SiO 2 /P 2 O 5 which cannot be made by conventional melt-quenching method. The new method is termed "melt-in-melt" which encapsulates the key step in the glass manufacturing process, i.e. one molten glass is poured into another molten glass with a stirring at high temperatures. Because of near unlimited possibilities in designing new glass compositions, there is a correspondingly great degree of freedom in the topological engineering of the glass structure, which in turn strongly influences the photoluminescence (PL) properties of active dopants. As a proof concept, bismuth and erbium are selected as the indicator dopants for emphasizing the real advantages of the new method as an effective means to tailoring the PL properties of the doped glasses. The micro structure and element distribution within the fabricated glasses are comprehensively characterized by high-resolution scanning electron microscopy, micro-Raman and high-performance X-ray fluorescence spectroscopy. Phase separation occurring at both nano-and meso-scale is observed. Apart from the developed glasses being themselves promising broadband emission phosphors, the new glass-making method may extend the possible applications of glass for important photonic applications (e.g. optical sensing, lighting, display, optical amplification and lasing etc.).

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Controlling Selective Doping and Energy Transfer between Transition Metal and Rare Earth Ions in Nanostructured Glassy Solids

Gao

Guo

et al. 2018

Advanced Optical Materials

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Selective doping of optically active ions into the nanocrystalline phase(s) of glass ceramics is of interest for photoluminescence (PL) applications to control the energy transfer (ET) processes between dopants on the nanometer length scale. Here, the focus is on explaining the essential knowledge of the distribution of two groups of active ions: transition metal (Ni2+ and Cr3+) and rare earth (Yb3+ and Er3+) ions, which are doped into i) single‐phase Ga2O3 and ii) dual‐phase Ga2O3 and YF3 nanocrystals (NCs). These NCs are obtained by thermally crystallizing ternary silicate‐ and quinary fluorosilicate‐based glasses, respectively. It is found that the two types of active ions can successfully be doped into Ga2O3 NCs, resulting in enhanced ET between the dopants because of the small separation distance of, e.g., <10 Å, whereas ET is significantly suppressed when Ga2O3 and YF3 NCs are coprecipitated. In this case, the studied rare earth ions have a high propensity for being selectively doped in YF3 NCs. The studied transition‐metal ions can always be found in Ga2O3 NCs irrespective of the presence of the fluoride phase. The selective doping and the ET between the two types of active ions can be controlled simultaneously on annealing. This may allow for the achievement of diverse PL properties, such as ultrabroadband near‐infrared and upconversion‐mediated Stokes emissions.

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The distribution of rare earth ions in a γ-Ga₂O₃ nanocrystal-silicate glass composite and its influence on the photoluminescence properties

Cited by 30 publications

References 39 publications

Correlation between ultrabroadband near‐infrared emission and Yb³⁺/Ni²⁺ dopants distribution in highly transparent germanate glass‐ceramics containing zinc gallogermanate nanospinels

Correlation between ultrabroadband near‐infrared emission and Yb³⁺/Ni²⁺ dopants distribution in highly transparent germanate glass‐ceramics containing zinc gallogermanate nanospinels

Topological Engineering of Photoluminescence Properties of Bismuth‐ or Erbium‐Doped Phosphosilicate Glass of Arbitrary P₂O₅ to SiO₂ Ratio

Controlling Selective Doping and Energy Transfer between Transition Metal and Rare Earth Ions in Nanostructured Glassy Solids

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The distribution of rare earth ions in a γ-Ga2O3 nanocrystal-silicate glass composite and its influence on the photoluminescence properties

Cited by 30 publications

References 39 publications

Correlation between ultrabroadband near‐infrared emission and Yb3+/Ni2+ dopants distribution in highly transparent germanate glass‐ceramics containing zinc gallogermanate nanospinels

Correlation between ultrabroadband near‐infrared emission and Yb3+/Ni2+ dopants distribution in highly transparent germanate glass‐ceramics containing zinc gallogermanate nanospinels

Topological Engineering of Photoluminescence Properties of Bismuth‐ or Erbium‐Doped Phosphosilicate Glass of Arbitrary P2O5 to SiO2 Ratio

Controlling Selective Doping and Energy Transfer between Transition Metal and Rare Earth Ions in Nanostructured Glassy Solids

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The distribution of rare earth ions in a γ-Ga₂O₃ nanocrystal-silicate glass composite and its influence on the photoluminescence properties

Correlation between ultrabroadband near‐infrared emission and Yb³⁺/Ni²⁺ dopants distribution in highly transparent germanate glass‐ceramics containing zinc gallogermanate nanospinels

Correlation between ultrabroadband near‐infrared emission and Yb³⁺/Ni²⁺ dopants distribution in highly transparent germanate glass‐ceramics containing zinc gallogermanate nanospinels

Topological Engineering of Photoluminescence Properties of Bismuth‐ or Erbium‐Doped Phosphosilicate Glass of Arbitrary P₂O₅ to SiO₂ Ratio