rahmatollah rahimi - Department of chemistry, University of Science and Technology ,Tehran
mahboobe rabani
Mahboobi Maryam

Nano-crystals photovoltaic cells using a dye photosensitizer in an n-type nanostructured TiO2 semiconductor have attracted great interest as a novel type of solar cell [1,2]. Plenty of works have been done on modifying the surface of nano- TiO2 to increase PET and improving its absorption characteristics. Different bonding modalities affect surface photovoltaic properties. SPV technique is exactly an effective and simple tool for investigating surface bonding modality [3]. The degeneration of energy level of α, β, γ, δ-tetrahydroxylphenylporphyrin (THPP) and red shift of the photovoltage peaks of THPP are observed as the size of nano- TiO2 decreasing using surface photovoltage (SPV) technique, while that of α, β, γ, δ -tetraphenylporphyrin (TPP) have little change [4].

Nano-TiO2; Bonding; Quasi-metalloporphyrin