Spectroscopic Properties of Cr3+-Doped Phosphate Glasses

Haouari, Mohamed; Ajroud, M.; Ouada, H. Ben; Maâref, H.; Brenier, A.; Garapon, C.

doi:10.1002/(sici)1521-3951(199910)215:2<1165::aid-pssb1165>3.0.co;2-q

Cited by 28 publications

(7 citation statements)

References 15 publications

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“…Addition of a small amount of chromium oxide, Cr 2 O 3 , in the inorganic glasses drastically changes their physical properties [11][12][13][14][15]. Extensive studies of structural, magnetic and dielectric properties of different glass systems containing Cr 2 O 3 were reported by Veeraiah et al [16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Electrical properties of Cr2O3–Fe2O3–P2O5 glasses. Part II

Šantić

Kim

Day

et al. 2010

Journal of Non-Crystalline Solids

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Section: Introductionmentioning

confidence: 99%

Electrical properties of Cr2O3–Fe2O3–P2O5 glasses. Part II

Šantić

Kim

Day

et al. 2010

Journal of Non-Crystalline Solids

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“…According to eq , it is obvious that the energy of 4 T 1 ( 4 F) and 4 T 2 ( 4 F) levels closely depend on the crystal field value of D q , and the energy of 2 E( 2 G) level is slightly influenced by the value of D q , which can be reflected from the Tanabe–Sugano diagram of Cr 3+ in Figure b. The Tanabe–Sugano diagram shows that the energy level of 4 T 1 ( 4 F) and 4 T 2 ( 4 F) rose with the increasing of D q / B . There is a crossover point (M) of 4 T 2 ( 4 F) and 2 E( 2 G) levels, which is the standard to distinguish the crystal field around Cr 3+ .…”

Section: Resultsmentioning

confidence: 91%

“…The Tanabe−Sugano diagram shows that the energy level of 4 T 1 ( 4 F) and 4 T 2 ( 4 F) rose with the increasing of D q /B. 23 There is a crossover point (M) of 4 T 2 ( 4 F) and 2 E( 2 G) levels, which is the standard to distinguish the crystal field around Cr 3+ . When the value of D q /B is to the right or left of M, the Cr 3+ is located in a strong or weak crystal field, respectively.…”

Section: Resultsmentioning

confidence: 99%

Design of a Novel Near-Infrared Phosphor by Controlling the Cationic Coordination Environment

Meng

Wang

Qiu

et al. 2018

Crystal Growth & Design

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Phosphors with the emission spectra located at the biological window I (650–950 nm) are significant for biological imaging. In this work, a series of deep red and near-infrared phosphors InMgGaO4: xCr3+ and In0.9‑y MgGaO4: 0.1Cr3+, yAl3+ are designed and successfully synthesized by a high temperature solid state method. InMgGaO4 is selected as the host considering its special crystal structure that one of the Mg/Ga–O bonds is affected by the surrounding environment. Therefore, when Cr3+ is substituted into the lattice, the longer Mg/Ga–O bonds are easily broken, which provides a tunable crystal field. The emission spectra of InMgGaO4: xCr3+ cover from 650 to 1200 nm, including one sharp line emission peak (peak 1) and two broad emission bands (peak 2 and peak 3). The Racha parameters D q/B and the decay curves are analyzed to distinguish the origins of these three peaks. Meanwhile, these three emission peaks show different degrees of red shift, which is related to the covalency, crystal field splitting (D q), bond breaking of Mg/Ga–O, and decrease of band gap. However, comparing with the luminescent property of Cr3+ single doped samples, In0.9‑y MgGaO4: 0.1Cr3+, yAl3+ shows a contrasting luminescence property and the reason is analyzed. In summary, the emission spectra of these samples can be tuned between a narrow peak and broad band continuously by controlling the concentration of Cr3+ ions or Al3+ ions, which shows a potential application in biological imaging.

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“…Spectroscopic properties based on luminescence decay characteristics and the time-resolved emission of Cr 3+ -doped phosphate glasses evidenced different site distributions of the chromium ions having an environment with nearly octahedral symmetry (Haouari et al 1999(Haouari et al , p. 1165.…”

Section: Introductionmentioning

confidence: 99%

Optical characterization of the phosphate glasses containing pair transition ions

et al. 2007

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The paper deals with optical and electronic properties of the aluminophosphate glasses containing Fe-Mn and Fe-Cr ion pairs in different concentration. The influence of the mixed alkali ions over the electronic properties has been investigated. The optical behavior (optical transmission) of the glass samples has been studied by UV-VIS spectroscopy and the refractive index dependency on wavelength has been discussed. The transmission spectra show features specific for the doping transition ions (TM), revealing different oxidation states of iron (Fe 2+ /Fe 3+ ), manganese (Mn 2+ /Mn 3+ ) and chromium (Cr 3+ /Cr 6+ ) in the vitreous network. Mössbauer spectroscopy offers information regarding the TM oxidation states, redox processes and the iron coordination symmetry in the vitreous network. In the case of Fe-Mn doped glasses, the percentage of Fe 2+ is about 40% and a doubled iron content leads to an increasing of Fe 2+ percentage up to 53%. The replacing of lithium ions by natrium ions (mixed alkali effect) provides an increasing of the Fe 2+ percentage up to 123 524 M. Elisa et al.56%. The occurrence of the tetrahedral or octahedral symmetry of Fe 2+ ions bonded by O 2− ions depends on the transition ion nature and Li + /Na + ratio. Infrared absorption spectra of the pair transition ions-doped aluminophosphate glasses reveal optical phonons specific for the phosphate glass matrix.

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Spectroscopic Properties of Cr3+-Doped Phosphate Glasses

Cited by 28 publications

References 15 publications

Electrical properties of Cr2O3–Fe2O3–P2O5 glasses. Part II

Electrical properties of Cr2O3–Fe2O3–P2O5 glasses. Part II

Design of a Novel Near-Infrared Phosphor by Controlling the Cationic Coordination Environment

Optical characterization of the phosphate glasses containing pair transition ions

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