Visible and near-IR luminescence via energy transfer in rare earth doped mesoporous titania thin films with nanocrystalline walls

Frindell, Karen L.; Bartl, Michael H.; Robinson, Matthew R.; Bazan, Guillermo C.; Popitsch, Alois; Stucky, Galen D.

doi:10.1016/s0022-4596(02)00126-3

Cited by 226 publications

(182 citation statements)

References 38 publications

Supporting

Mentioning

165

Contrasting

Unclassified

Order By: Relevance

“…Annealed sample shows a strong and sharp PL peaks at 400 nm, 452 nm in the PL Spectrum as shown in Fig.4. It is found that PL intensity increased gradually after annealing at 800 o C. The emission peaks at 400 nm (3.1 eV) was due to main band transition and Er related trapped states was attributed for emission [35,36,38] at 452 nm (~2.74 eV) [37][38][39][40][41] which has a good agreement with the value calculated from optical absorption measurement. …”

Section: Optical Absorption Analysissupporting

confidence: 69%

“…The optical band gap value close to ~ 3.3 eV (375 nm) and ~3.1 eV (400) was responsible for the TiO 2 main band transition for the as deposited and the 800 0 C annealed sample respectively. The band gap value ~ 2.76 eV was attributed to the Er related trapped states [35][36][37][38][39][40][41]. So, these results reveal that the doping of erbium oxide (Er 2 O 3 ) created a small red shift of 0.2 eV on the band gap value of the host material due to the formation of T-O-Er bond when annealed at 800 o C. Figure 4 shows the PL spectrum of Er 2 O 3 NP decorated TiO 2 NW at an excitation wavelength of 250 nm using F-7000 FL spectrophotometer.…”

Section: Optical Absorption Analysismentioning

confidence: 99%

See 1 more Smart Citation

Synthesis of Erbia Decorated Titania Nanowires Array Using Glancing Angle Deposition Technique

Devi¹

2017

IJRET

View full text Add to dashboard Cite

show abstract

Section: Optical Absorption Analysissupporting

confidence: 69%

Section: Optical Absorption Analysismentioning

confidence: 99%

Synthesis of Erbia Decorated Titania Nanowires Array Using Glancing Angle Deposition Technique

Devi¹

2017

IJRET

View full text Add to dashboard Cite

show abstract

“…The origins of these emissions are attributed to the corresponding RE ions as the spectral positions and shapes agree with those reported previously but with different hosts. (23)(24)(25)(26)(27)(28)(29)(30)(31)(32) The Ce-, Gd-, and Yb-doped samples did not show any measurable signals. These results can be interpreted as follows.…”

Section: Methodsmentioning

confidence: 99%

“…The origins of these emission lines were attributed to each trivalent RE ion based on previous studies. (23)(24)(25)(26)(27)(28)(29)(30)(31)(32)34,35) The Ce-doped sample showed no measurable PL emission. Unlike PL, the Gd-doped sample showed a sharp emission line at 310 nm due to the 4f-4f transition of Gd…”

Section: Methodsmentioning

confidence: 99%

Optical and Scintillation Properties of Rare-Earth Ion-Doped 12CaO·7Al2O3 Single Crystals

2017

Sensors and Materials

View full text Add to dashboard Cite

We have synthesized undoped and rare-earth (RE)-doped 12CaO·7Al 2 O 3 (RE:C12A7) crystals by the floating zone (FZ) method to systematically study the effects of RE doping (doped with all the lanthanoid elements except for Sc, Y, La, Pm, and Lu) in C12A7 for radiation detector applications. In both photoluminescence (PL) and scintillation, the undoped C12A7 crystal showed a weak emission due to the lattice defects appearing at around 500 nm, and the decay time was on the order of several nanoseconds. On the other hand, the RE:C12A7 crystals showed PL and scintillation owing to the 4f-4f transitions of RE 3+ ions appearing from the UV to NIR ranges depending on the RE element. The decay times of these emissions ranged from a few microseconds to milliseconds depending on the RE element and the values were typical for the electronic transitions of trivalent rare earths.

show abstract

“…5). As has been proposed by Stucky et al 10 The study has been supported by CREST of Japan Science and Technology Agency (JST). …”

mentioning

confidence: 92%

Photoluminescence properties of lamellar aggregates of titania nanosheets accommodating rare earth ions

Xin

Wang

et al. 2004

Applied Physics Letters

View full text Add to dashboard Cite

Fluorescent semiconductor materials doped with rare earth ions have been synthesized by flocculation of colloidal titania nanosheets, Ti0.91O2, with Eu3+ or Tb3+ ions. The composites had a lamellar structure with a gallery height of 1.06nm, accommodating rare earth ions between the nanosheets with a doping concentration as high as 10±1mol%. The composite with Eu3+ exhibited intense characteristic emission from Eu3+ either by exciting the Ti0.91O2 host with UV light (λ<350nm) or by directly exciting Eu3+ at a longer wavelength where there was no absorption by Ti0.91O2. This indicates that nonradiative energy transfer from the Ti0.91O2 host to Eu3+ can take place in this system. In contrast, no energy transfer was observed in the composite with Tb3+.

show abstract

Visible and near-IR luminescence via energy transfer in rare earth doped mesoporous titania thin films with nanocrystalline walls

Cited by 226 publications

References 38 publications

Synthesis of Erbia Decorated Titania Nanowires Array Using Glancing Angle Deposition Technique

Synthesis of Erbia Decorated Titania Nanowires Array Using Glancing Angle Deposition Technique

Optical and Scintillation Properties of Rare-Earth Ion-Doped 12CaO·7Al2O3 Single Crystals

Photoluminescence properties of lamellar aggregates of titania nanosheets accommodating rare earth ions

Contact Info

Product

Resources

About