<p>This article of review focused on the luminescence properties, such as excitation-emission, decay time and CIE chromatograph coordinates of borate, phosphate, germanate tellurite, boro-silicate, boro-phosphate, and boro-tellurite glass systems for w-LED applications. Typically, researchers focus Dy<sup>3+</sup> ions doped glass systems on w-LED as a result of their excellent blue (482&#xa0;nm: <sup>4</sup>F<sub>9</sub> → <sup>6</sup>H<sub>15/2</sub>), yellow (574&#xa0;nm: <sup>4</sup>F<sub>9</sub> → <sup>6</sup>H<sub>13/2</sub>), and a weak red (662&#xa0;nm: <sup>4</sup>F<sub>9</sub> → <sup>6</sup>H<sub>11/2</sub>) component transitions that combine to generate white emission. The weak red emission band of Dy<sup>3+</sup> is compensated by the dual- and tri-doped various RE<sup>3+</sup> ions (Sm<sup>3+</sup>, Eu<sup>3+</sup>, Er<sup>3+</sup>), which use their own emission transitions to increase the intensity of white emission. The quantum efficiency (η) and energy transfer are maximized at a concentration of 0.5&#xa0;mol% Dy<sup>3+</sup> ions across all glass system, subsequently decreasing at higher concentrations. Aside from co-doped rare earths with Dy<sup>3+</sup> ions in glass systems, a few combinations with their unique emission properties, such as Ce<sup>3+</sup>-Sm<sup>3+</sup>, Ce<sup>3+</sup>-Tb<sup>3+</sup>, Eu<sup>3+</sup>-Tb<sup>3+</sup>, Ce<sup>3+</sup>-Tb<sup>3+</sup>-Eu<sup>3+</sup>, Ce<sup>3+</sup>-Tb<sup>3+</sup>-Sm<sup>3+</sup>, Yb<sup>3+</sup>-Er<sup>3+</sup>-Tm<sup>3+</sup>, Yb<sup>3+</sup>- Ho<sup>3+</sup>-Tm<sup>3+</sup>, and Sm<sup>3+</sup>-Er<sup>3+</sup>-Tm<sup>3+</sup>, can attain white emission. In addition, this study investigate the influence of alkali (Li<sub>2</sub>O, Na<sub>2</sub>O and K<sub>2</sub>O), alkaline (BaO, CaO, MgO, and SrO), and transition metal oxide ions (Ti<sup>2+</sup>, Zn<sup>2+</sup>, Mn<sup>2+</sup>, Cd<sup>2+</sup>, Pb<sup>2+</sup> and W) on the structural and luminescence characteristics of glasses towards w-LED applications.</p>

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A review article: Luminescence features of rare earths-activated glass systems for w-LED applications

  • V. Sivaranjani,
  • P. Deepa,
  • Priya Murugesan,
  • A. Antony Suresh,
  • M. Dhavamurthy

摘要

This article of review focused on the luminescence properties, such as excitation-emission, decay time and CIE chromatograph coordinates of borate, phosphate, germanate tellurite, boro-silicate, boro-phosphate, and boro-tellurite glass systems for w-LED applications. Typically, researchers focus Dy3+ ions doped glass systems on w-LED as a result of their excellent blue (482 nm: 4F9 → 6H15/2), yellow (574 nm: 4F9 → 6H13/2), and a weak red (662 nm: 4F9 → 6H11/2) component transitions that combine to generate white emission. The weak red emission band of Dy3+ is compensated by the dual- and tri-doped various RE3+ ions (Sm3+, Eu3+, Er3+), which use their own emission transitions to increase the intensity of white emission. The quantum efficiency (η) and energy transfer are maximized at a concentration of 0.5 mol% Dy3+ ions across all glass system, subsequently decreasing at higher concentrations. Aside from co-doped rare earths with Dy3+ ions in glass systems, a few combinations with their unique emission properties, such as Ce3+-Sm3+, Ce3+-Tb3+, Eu3+-Tb3+, Ce3+-Tb3+-Eu3+, Ce3+-Tb3+-Sm3+, Yb3+-Er3+-Tm3+, Yb3+- Ho3+-Tm3+, and Sm3+-Er3+-Tm3+, can attain white emission. In addition, this study investigate the influence of alkali (Li2O, Na2O and K2O), alkaline (BaO, CaO, MgO, and SrO), and transition metal oxide ions (Ti2+, Zn2+, Mn2+, Cd2+, Pb2+ and W) on the structural and luminescence characteristics of glasses towards w-LED applications.