Structural and Luminescence Properties of Eu-Doped PMO Films with Ethylene Bridge and Methyl Terminal Groups

Eu-doped periodic mesoporous organosilicate (PMO) films with terminal methyl and ethylene bridging groups have been synthesized using sol-gel technology spin-coating, employing evaporation-induced self-assembly (EISA), on silicon wafers. Eu doping is achieved by the dissolution of Eu(NO3)3·6H2O in precursor solution. The deposited are characterized Fourier transform infrared (FTIR) spectroscopy, ellipsometric porosimetry (EP), X-ray photoelectron spectroscopy (XPS) photoluminescence spectroscopy. It observed that reduces concentration groups, makes more hydrophilic pore size open porosity. reduction reaction Eu3+ → Eu2+ occurs pores glass (OSG) films, which was confirmed depth profiling XPS. still present top surface films. presence gives luminescence emission range 600–630 nm (Eu3+) 290–400 (Eu2+). Eu2+/Eu3+ concentrations ratio depends CH3 ions can be reduced exposure to inductively coupled (ICP) oxygen plasma. shift spectra towards UV region, comparison previously reported attributed energy transfer occurring between host material ions.