| title: | Luminescence phenomena in ordered inhomogeneous solid solutions |
|---|---|
| reg no: | ETF5779 |
| project type: | Estonian Science Foundation research grant |
| subject: |
1.3. Physics 1.6. Physical, Analytical and Inorganic Chemistry |
| status: | accepted |
| institution: | TU Faculty of Mathematics |
| head of project: | Mihhail Danilkin |
| duration: | 01.01.2004 - 31.12.2007 |
| description: | The influence of partially ordered environment on the energy transfer between luminescent impurities in inhomogeneous solid solutions will be studied. To make an easier approach to a problem, the artificial opal-like photonic crystals with spatially ordered luminescent impurities will be prepared and studied. The main topic is, does the large-scale order in the environment influence the radiation transition rates to the same extent as the local symmetry selection rules do. One could expect the faster radiation transitions in the allowed directions for allowed photon emission in photonic crystals. Also, the prohibited by local symmetry based selection rules transitions could be influenced by the rules of photon propagation in photonic crystals. This makes possible to enhance the resonance energy transfer in partially ordered systems, where donor and acceptor ions are properly oriented and placed in photonic crystal macrostructure. Practical luminescent materials based on mixed-cation host materials, and also partially segregeted along with dislocations or block boundaries solid solutions often include the partially ordered luminescent impurities. The essential gain in the efficiency of different luminescent materials could be achieved on the basis of controlled partial ordering of inhomogeneous solid solutions. For example, the effect of mixed-cation host lattice composition on the luminescence output have been previously discovered and even practically used by our workgroup. However, the nature of the effect was not ever studied or discussed in publications. The project assumes international co-operation (Moscow State University, Mendeleev University of Chemical Technology of Russia) and involves graduate and postgraduate students works. |
| project group | ||||
|---|---|---|---|---|
| no | name | institution | position | |
| 1. | Mihhail Danilkin | TU Faculty of Mathematics | senoir research | |
| 2. | Mihkel Kerikmäe | TÜ KFI | doktorant | |
| 3. | Mare Must | TÜ KFI | keemik | |
| 4. | Viktor Seeman | University of Tartu | vanemteadur | |