Doctor blade technique Electric lamps 2 Electronic calculation 2 Emission properties 2 Emission spectroscopy 2 Energy transfer 2 Excitation and emission spectra 2 Fluorine compounds 2 Fourier transform infrared spectroscopy 2 Hafnium compounds 2 Polymer blends 2 Polyvinyl pyrrolidone 2 Recombination mechanisms 2 Uv excitation sources 2 Vinylidene fluoride 2 Coating techniques 1 Coatings 1 Deposition technique 1 Doctor blade method 1 Efficiency 1 Electrical conductivity 1 Environmental-friendly 1 Film thickness 1 Hybrid solar cells 1 Improving efficiency 1 Light absorption 1 Morphology 1 Oxide minerals 1 Power conversion efficiencies 1 Semiconductor materials 1