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The interface properties of silicon solar cell structures were characterized by the two non-destructive and highly surface-sensitive spectroscopic techniques: surface photovoltage and spectroscopic ellipsometry. The resulting charge and density of interface states as well as the microscopic...
Employing the generalisation of Van Vechten's cavity model, formation energies of neutral point defects in pyrites (FeS 2 , RuS 2 ), chalcopyrites (II–IV–V 2 and I–III–VI 2 ) as well as molybdenites (MoS 2 , WS 2 ) have been estimated. As input parameters the fundamental band gaps, work...
CdS quantum dots have been self-assembled on the surface of dispersed nanocrystalline TiO 2 particles, and a light-harvesting electrode has been fabricated from the resulting sensitized P25 particles using the pressing route. The spectroscopic and photochemical properties of photosensitized...
Surface methylated and Pt nano-dotted single crystal n-Si (1 1 1) electrodes yielded efficient photocurrent density ( j ) vs. potential ( U ) characteristics for more than 6 h in a highly corrosive electrolyte of aqueous 8.6 M HBr+0.05 M Br 2 . On the other hand, H-terminated and Pt nano-dotted...
Nanosized TiO 2 powders for photocatalytic degradation of organic pollutants are prepared by sol–gel method. The –Ti–O–Ti– network is synthesized by hydrolysis and controlled condensation of titanium isopropoxide Ti(O–iC 3 H 7 ) 4 . The resulting alcogels are dried under air to form...
Surface mesoscopic titanium dioxide (P25) films deposited onto conducting glass plates (SnO 2 :F) were modified by colloidal Ru x Se y nanoparticles (2 nm diameter). A decrease of the photocurrent was found upon modification of TiO 2 films. However, interfacial electron transfer kinetics to...
Current–voltage under illumination and quantum yield characteristics of an amorphous silicon/crystalline silicon hetero solar cell have been measured before and after exposure to high-energy (1.7 MeV) protons. A comparison of the measured wavelength-dependent quantum yield with calculated...
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