Natural dyes obtained from plants, vegetables and fruits are widely studied and tested as low cost sensitizer for dye sensitized solar cell ( DSSC) in order to replace the rare and expensive inorganic and organic sensitizers. Although, many works have been done using TiO2, ZrO2, ZnO etc. as the nanoporous semiconductor, little importance was given to the use of CdS thin film as a cost effective...

The effect of semiconductor passivation on quantum-dot-sensitized solar cells (QDSCs) has been systematically characterized for CdS and CdS/ZnS. We have found that passivation strongly depends on the passivation agent, obtaining an enhancement of the solar cell efficiency for compounds containing amine and thiol groups and, in contrast, a decrease in performance for passivating agents with acid...

Although CdS and PbS quantum dot-sensitized TiO2 nanotube arrays (TNTAs/QDs) show photocatalytic activity in the visible-light region, the low internal quantum efficiency and the slow interfacial hole transfer rate limit their applications. This work modified the surface of the TNTAs/QDs photoelectrodes with metal-oxide overlayers by atomic layer deposition (ALD), such as coating Al2O3, TiO2, a...

Single crys ta l semiconductors (n-Si, p-Si , n -GaAs , p -GaAs , n -GaP, n-In.P, and n -CdS) were coated wi th n t y p e TiO~ by a chemical vapor deposi t ion technique, and the e lec t ron and hole t r ans fe r proper t ies across the he te ro junct ion so produced were invest igated. The qua l i ty of the deposi ted TiO~ film depended upon severa l factors inc luding t empe ra tu r e and sub...

Semiconductor sensitized solar cell interfaces have been studied with photoelectron spectroscopy to understand the interfacial electronic structures. In particular, the experimental energy level alignment has been determined for complete TiO2/metal sulfide/polymer interfaces. For the metal sulfides CdS, Sb2S3 and Bi2S3 deposited from single source metal xanthate precursors, it was shown that bo...

Studies on single-atom catalysts (SACs) with individually isolated metal atoms anchored specific supports have gained great interest in photocatalysis due to their enhanced catalytic activity and optimal atom utilization. By providing the optimized number of active sites enhancing intrinsic activity, SACs afford a distinctive platform for at atomic level. In this study, we investigate photocata...