Abstract
Based on the demonstration of the fluorescent properties, Dy3+ doped borosilicate glasses (NLKSB) were confirmed to be an efficient phosphor under long-wave ultraviolet (UVA) radiation. Ce3+ and Sb3+ are introduced to the Dy3+ doped NLKSB glass system, which extends the excitable region to medium-wave ultraviolet (UVB) and short-wave ultraviolet (UVC) spectral ranges. Sensitization coefficient of Ce3+-Sb3+ to Dy3+ under different wavelengths is in accordance with the multiplication of Ce3+ to Dy3+ and Sb3+ to Dy3+, besides, this unexpected phenomenon is attributed to the effect of band superposition. The enhancement coefficient of quantum yield reaches up to 7.03 for the main emission of Dy3+ under the UVB-LED excitation, which indicates that multiplier effect of sensitization plays an outstanding role in macroscopic applications. The excellent sensitization effect and the effective excitability expansion provide a breakthrough in developing of high-quality lighting devices.
| Original language | English |
|---|---|
| Article number | 117062 |
| Journal | Journal of Luminescence |
| Volume | 221 |
| DOIs | |
| State | Published - May 2020 |
| Externally published | Yes |
Keywords
- Borosilicate glasses
- Dy fluorescence
- Multiplier effect of sensitization
- UV excitation-extension
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