Optical properties of 3d N transition metal ion-doped lead borate glasses

Hong, Wen; Tanner, Peter A.; Cheng, Bing‐Ming

doi:10.1016/j.materresbull.2016.06.032

Cited by 51 publications

(9 citation statements)

References 57 publications

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“…Colored glasses acquired a lot of interest in commercial business as they are favored in home decoration and many other technological applications. Optical transitions between energy split d and f levels in transition metals (TM) and rare earth ions, respectively, are the main origin for color effects [1][2][3][4][5][6][7][8][9][10]. For precise and controlled tunability of glasses color, for example, it is appealing to search for suitable glass hosts capable of accommodating varies concentrations of TM ions.…”

Section: Introductionmentioning

confidence: 99%

Optical Transitions from Hexavalent Chromium in Lithium-Borate Glasses

Slibi

Hassan

El-Fattah

et al. 2021

Preprint

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The melt-quenching technique was used to prepare a series of chromium-doped borate glasses with the composition xCr2O3 - (70-x) B2O3- 30 Li2O- (x = 0, 0.1, 0.2, 0.3 and 0.5 mol %). The low-doping level here employed allowed to unambiguously identify well-defined near-edge Cr6+ optical transitions, and to precisely determine the optical band gap of the borate glass host. Additional Cr3+ transitions were observed in the visible regime, rendering a strong modulation of the glass color, from colorless to dark greenish, with Cr content. Both Cr6+(after the charge transfer transformation into Cr5+) and Cr3+oxidation states and their variations with Cr doping were identified from electron spin resonance spectroscopy. All samples exhibit similar vibrational spectra dominated by BO3 and BO4 structural units, with the development of weak Cr6+ vibration with Cr doping. The present study provides structurally similar but optically active and tunable glass hosts suitable for various optical applications.

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Section: Introductionmentioning

confidence: 99%

Optical Transitions from Hexavalent Chromium in Lithium-Borate Glasses

Slibi

Hassan

El-Fattah

et al. 2021

Preprint

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“…Such a splitting manifests in the optical spectra as a broad resonance in the red side of the electromagnetic spectrum, near the infrared [3,[16][17][18][19]. Additional splitting of 2 E g and 2 T 2g states, in a tetragonally-distorted octahedral coordination with six oxygen ligands, into ( 2 B 1 and 2 A 1 ) and ( 2 E and 2 B 2 ) takes place due to Jahn-Teller effect [3,[18][19][20][21], which could lead to more optical transitions in the ultraviolet regime. Information regarding levels splitting just discussed for Cr and Cu TM ions could readily be inferred from optical and electron spin resonance (ESR) spectroscopies, where the latter identi es the oxidation states of TM ions exclusively with unpaired electrons.…”

Section: Introductionmentioning

confidence: 99%

Multiple Optical Features In Binary-Transition-Metal Borate Glasses

Hassan

Ashoush

Ebrahim

et al. 2021

Preprint

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Glasses doped with transition metal (TM) ions exhibit rich optical transitions spanning the entire ultraviolet, visible, and infrared spectral regimes. Here we utilize the melt-quenching techniques to synthesis binary-TM-doped borate glasses of composition xCuO-(75-x)B2O3-24.7Li2O-0.3Cr2O3, with x = 0, 0.2, 1.0 and 2.0 mol %. We identify several optical transitions from Cr3+, Cr6+, and Cu2+ ions, the latter manifests at longer wavelengths and gains higher intensity with Cu additives. Despite Cr concentration being fixed, the Cr6+ peaks are quenched and Cr3+ signals are barely attenuated. This behavior rules out possible phase separation and suggests non-trivial interplay between the two TM ions and ligand, as supported by probing their oxidation states from electron spin resonance. The crystal field and Racah parameters followed an opposite behavior, while the optical band gap is reduced upon doping. These changes are correlated with structural modifications introduced by Cu additives, where we anticipate homogenous and preferential proximity of Cu-Cr ions within the network.

show abstract

Section: Introductionmentioning

confidence: 99%

Multiple optical features in binary-transition-metal borate glasses

et al. 2021

View full text Add to dashboard Cite

Glasses doped with transition metal (TM) ions exhibit rich optical transitions spanning the entire ultraviolet, visible, and infrared spectral regimes. Here we utilize the melt-quenching techniques to synthesis binary-TM-doped borate glasses of composition xCuO-(75-x)B 2 O 3 -24.7Li 2 O-0.3Cr 2 O 3 , with x = 0, 0.2, 1.0 and 2.0 mol %. We identify several optical transitions from Cr 3+ , Cr 6+ , and Cu 2+ ions, the latter manifests at longer wavelengths and gains higher intensity with Cu additives. Despite Cr concentration being xed, the Cr 6+ peaks are quenched and Cr 3+ signals are barely attenuated. This behavior rules out possible phase separation and suggests non-trivial interplay between the two TM ions and ligand, as supported by probing their oxidation states from electron spin resonance. The crystal eld and Racah parameters followed an opposite behavior, while the optical band gap is reduced upon doping. These changes are correlated with structural modi cations introduced by Cu additives, where we anticipate homogenous and preferential proximity of Cu-Cr ions within the network.

show abstract

Optical properties of 3d N transition metal ion-doped lead borate glasses

Cited by 51 publications

References 57 publications

Optical Transitions from Hexavalent Chromium in Lithium-Borate Glasses

Optical Transitions from Hexavalent Chromium in Lithium-Borate Glasses

Multiple Optical Features In Binary-Transition-Metal Borate Glasses

Multiple optical features in binary-transition-metal borate glasses

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