Intense Visible Photoluminescence from C46H22N8O4KM (M = Co, Fe, Pb) Derivatives Thin Films

DOI: 10.4236/ampc.2011.13010   PDF   HTML     5,499 Downloads   9,265 Views   Citations


Strong visible photoluminescence (PL) at room temperature is obtained from thermal-evaporated thin solid films of Metallophthalocyanine (M = Co, Fe, Pb) and double potassium salt from 1,8 dihydroxyan-thraquinone. The PL of all the investigated samples is observed with the naked eye in a bright background. The deconvolution of the normalized PL spectra shows that each PL spectrum is composed of four emission bands which peak at approximately the same energies of 2.1, 2.2 and 2.4 eV and whose intensities and widths depend upon the structure of the complexes. FTIR and ellipsometry are employed to investigate the structural differences among the films. The optical absorption of the films is also investigated to evaluate the changes in the electronic structure of these metal organic compounds, with respect to other metalphtalocya-nines thin films. Our results suggest that the visible PL comes from radiative transitions between energy lev-els associated to the double potassium salt coordination to the metallic ion in the phthalocyanine.

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M. Sánchez, J. Alonso and J. Reider, "Intense Visible Photoluminescence from C46H22N8O4KM (M = Co, Fe, Pb) Derivatives Thin Films," Advances in Materials Physics and Chemistry, Vol. 1 No. 3, 2011, pp. 57-63. doi: 10.4236/ampc.2011.13010.

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The authors declare no conflicts of interest.


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