Atomic/molecular layer deposition (ALD/MLD) processes based on Eu(thd)3 and three different aromatic organic acids with O and N donors as precursors are systematically investigated for the growth of Eu-based inorganic-organic thin-film phosphors. For all the acid precursors evaluated, i.e. 1,4-dicarboxylic, 3,5-pyridinedicarboxylic and 2,6-pyridinedicarboxylic acids, conditions are found to produce high-quality hybrid thin films through self-saturating gas-solid reactions as expected for an ideal ALD/MLD process. The resultant Eu-organic thin films show intense red photoluminescence. The luminescence characteristics depend on the manner the organic ligands are bound to Eu3+; this is discussed based on FTIR, XPS, UV-vis and fluorescence spectroscopy data measured for the films.
Giedraityte, Z., Marin, G., Mustonen, O., Multia, J., Philip, A., Srivastava, D., Tripathi, T., Jin, H., Khayyami, A., Krahl, F., Safdar, M., Thomas, C., Ahvenniemi, E., Heiska, J., Medina, E., Ghazy, A., Hagen, D., Lepikko, S., Johansson, L., Karppinen, M., Aleksandrova, I., Haggren, A. & Nisula, M.
23/12/2013 → 31/01/2019
Projekti: EU: ERC grants