Methods and apparatus are disclosed regarding photoelectrochemical solar cells formed using inkjet printing and nanocomposite organic-inorganic materials, such as for converting solar energy into electricity. An exemplary solid photoelectrochemical solar cell formation includes thin layers of nanocomposite organic-inorganic materials. A specific exemplary solid photoelectrochemical solar cell may include: a negative electrode comprising a transparent electroconductive glass plate; a thin transparent film of mesoporous nanocrystalline titanium dioxide of controlled thickness above the negative electrode, formed by dip-coating, spin-coating or inkjet printing, and having a photosensitizer dye comprising a ruthenium organometallic complex, a merocyanine dye, or a hemicyanine dye; a layer of a solid gel electrolyte formed above the titanium dioxide layer and including a nanocomposite organic-inorganic material and a redox couple; and a positive electrode comprising a second electroconductive glass plate having a thin layer of deposited electrocatalyst made of platinum, carbon, or both, in the form of nanostructures, including nanoparticles, nanotubes, conjugated conductive polymers, or their mixtures.
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