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| Titel: |
Thulium as a sensitizer for the Gd3+/Eu3+ quantum cutting couple |
| Auteur: |
Peijzel, P. S. Schrama, W. J. M. Meijerink, A. |
| Verschenen in: |
Molecular physics |
| Paginering: | Jaargang 102 (2004) nr. 11-12 pagina's 1285-1290 |
| Jaar: |
2004-06-10 |
| Inhoud: |
The increasing knowledge of the energy level structure of the lanthanides has led to new applications for these ions. The Gd3+/Eu3+ quantum cutting couple was discovered a few years ago and may be applied in phosphors for fluorescent tubes based on a VUV xenon discharge. The VUV absorption of the phosphor LiGdF4:Eu3+ is poor and therefore a sensitizer is needed. This contribution describes an investigation of the use of the strong 4f12: →: 4f115d VUV absorption bands of thulium ions as a sensitizer for the Gd3+/Eu3+ quantum cutting couple. The incorporation of thulium in the quantum cutting phosphor LiGdF4 does result in sensitization of Gd3+ but not in downconversion in the Gd3+/Eu3+ couple. A competing downconversion process between gadolinium and thulium occurs resulting in infrared emission of thulium, which is not suitable for lighting applications. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 36 van 37 gevonden artikelen
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