The surface photovoltaic properties of α, β, γ, δ -tetrahydroxylphenylporphyrin (THPP)and α, β, γ, δ -tetraphenylporphyrin (TPP) affected by nano-TiO2

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].

کلیدواژه ها:

Nano-TiO2 ، Bonding ، Quasi-metalloporphyrin