Anomalous power dependence of sensitized upconversion luminescence
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- 23 March 2005
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 71 (12), 125123
- https://doi.org/10.1103/physrevb.71.125123
Abstract
The expected excitation power dependencies for any upconversion emission band of an acceptor ion is investigated theoretically when the excitation takes place on a sensitizer ion and subsequent energy transfer upconversion from the sensitizer to the acceptor ion is exclusively responsible for the excitation of the acceptor ion. Under these limitations it is shown that emission from a state that requires energy transfer upconversion steps will have a slope of in the low-power regime when the luminescence intensity is plotted in a double-logarithmic representation versus absorbed pump intensity. In the high-power regime, any emission band will show a slope of 1, irrespective of the number of energy transfer steps from the sensitizer to the acceptor ions that are involved. The theoretical results are verified experimentally by data on three different inorganic systems with different types of sensitizer and acceptor ions: rare earth (RE) ions as well as transition metal (TM) ions. The active ions in the systems that are studied experimentally are RE/RE, RE/TM, and TM/TM, where the first dopant indicates the sensitizer ion and the second dopant indicates the upconverting ion. These different classes of sensitizer and upconverter ions all agree with the theoretical predictions put forward by the model. Thus providing confidence in the applicability (within the boundary conditions put forward here) of the model described.
Keywords
This publication has 19 references indexed in Scilit:
- Upconversion Processes in Transition Metal and Rare Earth Metal SystemsPublished by Springer Science and Business Media LLC ,2000
- Power dependence of upconversion luminescence in lanthanide and transition-metal-ion systemsPhysical Review B, 2000
- Near-infrared to visible upconversion in -doped and excited at 1.54 μmPhysical Review B, 1999
- A Three-Color, Solid-State, Three-Dimensional DisplayScience, 1996
- The photon avalanche: A new phenomenon in Pr3+-based infrared quantum countersApplied Physics Letters, 1979
- On the Efficiency of Yb3+‐Er3+ Activated Up‐Conversion PhosphorsJournal of the Electrochemical Society, 1975
- Materials and devices using double-pumped-phosphors with energy transferProceedings of the IEEE, 1973
- NaYF4 : Yb,Er—an efficient upconversion phosphorApplied Physics Letters, 1972
- Observation and Saturation of a Multiphoton Process in NdPhysical Review Letters, 1966
- Solid State Infrared Quantum CountersPhysical Review Letters, 1959