الفهرس 
English SummaryOnly 14 pages are availabe for public view
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Abstract
As one of the key materials in DSSCs, the photosensitizing dye (sensitizer) plays a crucial role
in determining the power conversion efficiency (PCE) of DSSC devices by serving as the
accountable component of capturing and converting light energy as chlorophyll in the
photosynthesis process. A photoactive bandgap-engineered semiconducting oxide (commonly
TiO2) is attained via sensitization with organic or organometallic dye adsorbed on the
semiconductor nanoparticles. Similar to doping semiconductor, the objective of the sensitization
approach is to provide the excitation energy, though not essentially the bandgap, to be comparable
to the energy of photons in a definite part of the solar emission spectrum. However, in a sensitized
semiconductor, the bandgap is defined primarily by the nature of the photosensitizer with distinct
dynamics of the photogenerated electron that is subsequently injected into the conduction band
(CB) of the semiconductor. One of the central problems that DSCs are currently still facing is their
merely partial absorption coverage of the solar emission spectrum owing to sensitization of the
semiconductor surface with a single dye.