| Zugriffsnummer | 17064 |
| Dokumenttyp | Zeitschriftenartikel |
| Sprache | Englisch |
| Titel | Quantum efficiency of 1S0 and 3P0,1 levels of Pr3+ doped YF3 |
| Autor(in); Institution |
Kück, Stefan; 4.1, Photometrie und angewandte Radiometrie, PTB-Braunschweig
Sokólska, Irena; Polish Academy of Sciences, Institute of Low Temperature and Structure Research, Wroclaw, POLAND; Universität Hamburg, Institut für Laser-Physik, Hamburg, GERMANY
Henke, Markus; Universität Hamburg, Institut für Laser-Physik, Hamburg, GERMANY
Osiac, Eugen; Institute of Atomic Physics, Bucharest, ROMANIA
|
| Quelle/Jahr | Chemical Physics: 310 (2005), 1/3, 139 - 144 |
| ISSN | 0301-0104 |
| Verlag | Amsterdam [u.a.]: Elsevier |
| Freie Schlagworte | Quantum efficiency ; Pr3+ ; Quantum cutting ; Photon cascade emission ; VUV phosphor ; YF3 |
| Zusammenfassung | We present a detailed investigation of the quantum efficiency of the 1S0 and 3P0,1 levels in Pr3+ doped YF3 under VUV excitation. The quantum efficiency of the 3P0,1 level was determined by the measurement and comparison of the photon fluxes of the 1S0 → 1I6 transition around 400 nm with the visible emissions occurring from the 3P0,1 levels. It was found that already at concentrations as low as 0.01 % the 3P0,1 emission quantum efficiency is only about 61 %. The quenching process is most probable caused by an energy transfer cross relaxation process involving the 3P0,1 levels and the 3H4 ground state. For concentrations of 0.1 %, 0.5 %, 1 % and 10%, the quantum efficiency was determined to be about 42 %, 29 %, 17 %, and 0.4 %, respectively. The total quantum efficiency of the visible emission (380 nm to 750 nm) under excitation at 190 nm, determined by measurements of the total photon flux, has a maximum for a Pr3+concentration of 1 %. At this value, the absorption efficiency of the 4f5d absorption bands is very high and the 3P0,1 quenching is only moderate. |
