Luminous properties of Tb3+ in the ZrO2 and TiO2 nanoparticles

Moon, Byung Kee; Jeong, Jung Hyun; Yi, Soung Soo; Choi, Sung Eul; Kim, Pyoung Suk; Choi, Hee Kyoung; Kim, Junghwan

doi:10.1016/j.jlumin.2006.01.313

Cited by 17 publications

(9 citation statements)

References 9 publications

(10 reference statements)

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“…The results of X-ray diffraction and Raman spectroscopy will show the influence of the Tb dopant upon the structure of as-deposited films. In contrast to the examples presented in the literature [6,11,12,[14][15][16], the PL effect will be observed only in nanocrystalline TiO 2 :(2.6 at. % Tb) film with rutile structure, while presence of the anatase form or the two-phase system (anatase-rutile) will not favour the occurrence of this phenomenon.…”

Section: Introductioncontrasting

confidence: 80%

“…However, emission of the light is weak [12,13] and the reason for the direct excitation process of Tb 3+ ions in titania host was not precisely described. So far, a PL effect was obtained for thin films with an anatase structure [6,11,13,14] or amorphous ones [10,16]. In the case of TiO 2 films with a rutile structure, this phenomenon was presented only in our previous work [17].…”

Section: Introductionmentioning

confidence: 90%

“…For such applications lanthanides were incorporated into different types of materials, which had crystalline structure or were amorphous. Metalloorganic compounds or fluorine glass are good candidates as a matrix for the lanthanides [6], but nowadays thin films based on transparent metal oxides are being in the center of interest [1]. The newest results of scientific investigations show that oxide films built from crystallites below 10 nm in size may exhibit new phenomena that usually cannot be observed in films with crystallites bigger than tens of nanometers.…”

Section: Introductionmentioning

confidence: 99%

“…The most often commercially applied matrices for terbium are Y 3 (Al, Ga) 5 O 12 and Gd 2 O 3 S [6]. From a time when transparent metal oxides evoked higher interest, due to their application area and optical properties, the effective photoluminescence (PL) of Tb 3+ ions in those materials has been accurately investigated [6]. PL of terbium is usually observed in ZrO 2 [8] or SiO 2 matrices [9,10], while in the case of titania this phenomenon has been rarely described.…”

Section: Introductionmentioning

confidence: 99%

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Influence of terbium on structure and luminescence of nanocrystalline TiO2 thin films

et al. 2013

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Abstract:In this work analysis of the structural and optical properties of TiO 2 thin films doped with terbium has been described. Samples were prepared by a high energy reactive magnetron sputtering process under low pressure of oxygen plasma. X-ray diffraction results have shown that different TiO 2 crystal forms have been produced, depending on the amount of Tb dopant. The undoped matrix had rutile structure with crystallites with a size of 8.7 nm, while incorporation of 0.4 at. % of Tb into the film during the sputtering process resulted in anatase structure with bigger crystallites (11.7 nm). Increasing the amount of terbium up to 2 at. % and 2.6 at. % gave rutile structure with crystallites with a size of 6.6 nm for both films. However, Raman spectroscopy has revealed that in the case of TiO 2 :(2 at. % Tb), except for the rutile form, the presence of fine-crystalline anatase was observed. Moreover, the lack of Raman peaks shift attests to the lack of stress in the titania lattice of all of the TiO 2 :Tb films. This fact indicates localization of Tb 3+ ions on the surface of TiO 2 nanocrystals. In the case of optical investigation, results have shown that doping with terbium has a significant influence on the properties of TiO 2 , but it does not decrease the high transparency of the matrix. The observed changes of the transmission characteristics were produced only due to modification of the TiO 2 :Tb structure. Photoluminescence measurements have shown that emission of light from TiO 2 :Tb films occurs when the amount of terbium is 2.6 at. %. Based on the obtained results a scheme of direct energy transfer from titanium dioxide matrix (with rutile structure) to Tb 3+ ions has been proposed.

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Section: Introductioncontrasting

confidence: 80%

Section: Introductionmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of terbium on structure and luminescence of nanocrystalline TiO2 thin films

et al. 2013

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“…Photoluminescence for both materials increases with increase of temperature and was maximum for the samples heated to 1000 1C. However, Moon et al [27] found maximum luminescence for ZrO 2 :Tb 3 + films at 700 1C and it becomes almost zero at 900 1C. They proposed it may be due to the increased diffusion of Tb ions into zirconia.…”

Section: Sem Analysismentioning

confidence: 95%