The use of ZrO2 as an electron-injection layer (EIL) in a hybrid inorganic-organic semiconductor light-emitting diode is analyzed. Solvents and materials used in the manufacture of metal oxide films were procured from Sigma-Aldrich, while a Au wire was bought from Goodfellow. Light-emitting polymers were provided by the Sumitomo Chemical Company Ltd. Compact Zirconium dioxide layers were deposited by spray pyrolysis at 450°C from a solution of zirconium acetylacetone in N,N-dimethylformamide. The Lumation polymers were selected as typical advanced OLED materials with PFO, F8BT, and Red-F as representative earlier generation, more widely studied members of the same polyfluorene family. Device characterization was performed using a Keithley 2400 source combined with a Konica Minolta L100 luminance meter. Electroluminescence spectra were calculated using a Fluoromax spectrofluorimeter.