Local structural environment and photoluminescence of Er3+ ions doped in indium tin oxide nanopowder

Choi, Yong Gyu; Yu, Sung Mi; Chung, Woon Jin

doi:10.1016/j.cplett.2008.07.047

Cited by 11 publications

(16 citation statements)

References 25 publications

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“…11,40,41,43,44 The solubility limit of the REE activators in In 2 O 3 and the amount of doping that can be used before concentration quenching of the emissions occurs remains unclear. When Er was added to ITO, no concentration quenching was observed up to at least 5 cat %, 25 but a recent work by Ting et al observed concentration quenching from Eu in ITO already above 0.1 cat %. 37 On the other hand, Vela et al observed maximum emissions when 15 to 30 cat % Eu was doped into nano-particles of In 2 O 3 .…”

Section: Introductionmentioning

confidence: 97%

“…[43][44][45] There is some degree of discrepancy in the literature regarding the energy transfer from the host to the activator, called the host sensitisation. In fact, in some of the cases emission signals could only be obtained under direct excitation of the energy levels of the activator, 25,27 whereas in another case emissions were only observed upon excitation over the band gap of the host, and direct excitation was not possible. 38 However, it seems to be clear that an energy transfer from In 2 O 3 to a REE is achievable.…”

Section: Introductionmentioning

confidence: 99%

“…22,23 It is proposed that such phosphors can be used in applications such as upconversion phosphors for solar cells, light-emitting diodes, displays, lasing, bioimaging, optoelectronics or others. 10,11,[24][25][26][27] In 2 O 3 might be a potentially good host material for a REE dopant, as all the rare earth sesquioxides crystallise in the same bixbyite crystal structure as In 2 O 3 . 28 Additionally, all of the REEs are usually trivalent with sizes relatively similar to that of In 3+ .…”

Section: Introductionmentioning

confidence: 99%

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Solid solubility of rare earth elements (Nd, Eu, Tb) in In_2−xSn_xO₃ – effect on electrical conductivity and optical properties

et al. 2014

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Wide band-gap semiconductors doped with luminescent rare earth elements (REEs) have attracted recent interest due to their unique optical properties. Here we report on the synthesis of the transparent conducting oxides (TCOs) indium oxide and indium tin oxide (ITO) doped with neodymium, europium and terbium. The solid solubility in the systems was investigated and isothermal phase diagrams at 1400 °C were proposed. The solubility of the REEs in In2O3 is mainly determined by the size of the rare earth dopant, while in ITO the solid solubility was reduced due to a strong tendency of the tin and REE co-dopants to form a pyrochlore phase. The effect of the REE-doping on the conductivity of the host was determined and optical activity of the REE dopants were investigated in selected host materials. The conductivity of sintered materials of REE-doped In2O3 was significantly reduced, even at small doping concentrations, due to a decrease in carrier mobility. The same decrease in mobility was not observed in thin films of the material processed at lower temperatures. Strong emissions at around 611 nm were observed for Eu-doped In2O3, demonstrating the possibility of obtaining photoluminescence in a TCO host, while no emissions was observed for Nd- and Tb-doping.

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Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Solid solubility of rare earth elements (Nd, Eu, Tb) in In_2−xSn_xO₃ – effect on electrical conductivity and optical properties

et al. 2014

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“…[11][12][13][14][15][16] Cubic sesquioxide In 2 O 3 is recognized as one of the promising host materials for both up-/down-conversion luminescence through rare earth doping. [17][18][19] At present, the controllable preparation of high effective UCL of rare earth (RE) doped In 2 O 3 NCs is still difficult. Several strategies have been proposed to solve these problems.…”

Section: Introductionmentioning

confidence: 99%

One-step synthesis and upconversion luminescence properties of hierarchical In₂O₃:Yb³⁺,Er³⁺ nanorod flowers

Wang

Zhu

et al. 2017

RSC Adv.

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“…By adopting the CF parameters in [29,192−195]. Kim et al [193] and Choi et al [194] [29], due possibly to the host sensitization. Antic-Fidancev and co-workers [195] performed the energy-level-fitting of Eu 3+ in C-type In 2 O 3 polycrystals.…”

Section: Sm 3+mentioning

confidence: 99%

Lanthanide-doped semiconductor nanocrystals: electronic structures and optical properties

2015

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solid state lightings [11,12]. Nevertheless, due to the parity forbidden transition nature, the absorption cross-section of f-f transition is small and usually high power light sources such as laser are needed to excite the Ln 3+ ions. The ability to excite Ln 3+ ions efficiently in a broad spectral range is strongly desired for realizing their full potentials in signaling and lighting applications. To improve the excitation efficiency of Ln 3+ , sensitization is an efficient way to avoid the direct excitation of the Ln 3+ . Charge transfer, electronics transfer from ligand ground states (e.g., O 1s) to the Ln 3+ excited states, has proved to be an efficient means to achieve intense Ln 3+ emissions, due to its large band absorption cross-section. By employing this strategy, commercial phosphor Y 2 O 3 :Eu 3+ has been demonstrated to be an excellent red phosphor, which can be effectively excited at Eu-O charge transfer band at 255 nm. Another strategy for efficient sensitization of Ln 3+ is via the energy transfer (ET) from semiconductor nanocrystals (SNCs), which generally possess large absorption cross-section for Ln 3+ excited states. Moreover, it is known that the exciton Bohr radius of semiconductors is much larger than that of insulators [13], which could result in pronounced quantum confinement effect for small nanocrystals (NCs) (e.g., 2−10 nm for In 2 O 3 , ZnO and TiO 2 ). As a result, the optical properties of Ln 3+ incorporated in SNCs could be tailored via size control or bandgap engineering, which is very attractive in fabricating a nano-device for technological applications. It is anticipated that the luminescence of Ln 3+ ions can be efficiently sensitized via the energy transfer from the excited host to Ln 3+ , which thereby overcomes the inefficient direct absorptions of the parity forbidden 4f-4f transitions of Ln 3+ ions (Fig. 1). To realize the efficient energy transfer and intense Ln 3+ PL, the successful incorporation of Ln 3+ into the lattices of SNCs is of utmost importance, which still remains a great challenge via conventional wet-chemical methods especially for some widely used wide bandgap Trivalent lanthanide (Ln 3+ ) ions doped semiconductor nanomaterials have recently attracted considerable attention owing to their distinct optical properties and their important applications in diverse fields such as optoelectronic devices, flat plane displays and luminescent biolabels. This review provides a comprehensive survey of the latest advances in the synthesis, electronic structures and optical spectra of Ln 3+ ions in wide band-gap semiconductor nanocrystals (SNCs). In particular, we highlight the general wet-chemical strategies to introduce Ln 3+ ions into host lattices, the local environments as well as the sensitization mechanism of Ln 3+ in SNCs. The energy levels and crystal-field parameters of Ln 3+ in various SNCs determined from energy-level-fitting are summarized, which is of vital importance to understanding the optical properties of Ln 3+ ions in SNCs. Finally, some future pros...

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Local structural environment and photoluminescence of Er3+ ions doped in indium tin oxide nanopowder

Cited by 11 publications

References 25 publications

Solid solubility of rare earth elements (Nd, Eu, Tb) in In_2−xSn_xO₃ – effect on electrical conductivity and optical properties

Solid solubility of rare earth elements (Nd, Eu, Tb) in In_2−xSn_xO₃ – effect on electrical conductivity and optical properties

One-step synthesis and upconversion luminescence properties of hierarchical In₂O₃:Yb³⁺,Er³⁺ nanorod flowers

Lanthanide-doped semiconductor nanocrystals: electronic structures and optical properties

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Local structural environment and photoluminescence of Er3+ ions doped in indium tin oxide nanopowder

Cited by 11 publications

References 25 publications

Solid solubility of rare earth elements (Nd, Eu, Tb) in In2−xSnxO3 – effect on electrical conductivity and optical properties

Solid solubility of rare earth elements (Nd, Eu, Tb) in In2−xSnxO3 – effect on electrical conductivity and optical properties

One-step synthesis and upconversion luminescence properties of hierarchical In2O3:Yb3+,Er3+ nanorod flowers

Lanthanide-doped semiconductor nanocrystals: electronic structures and optical properties

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Product

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Solid solubility of rare earth elements (Nd, Eu, Tb) in In_2−xSn_xO₃ – effect on electrical conductivity and optical properties

Solid solubility of rare earth elements (Nd, Eu, Tb) in In_2−xSn_xO₃ – effect on electrical conductivity and optical properties

One-step synthesis and upconversion luminescence properties of hierarchical In₂O₃:Yb³⁺,Er³⁺ nanorod flowers