Enhanced charge-carrier transfer by CdS and Ag2S quantum dots co-sensitization for TiO2 nanotube arrays

TiO2 nanotube arrays co-sensitized with Ag2S and CdS QDs display enhanced UV-Vis absorption, reduced interfacial resistance, positive shift of the flat band potentials, elongated photoinduced electron lifetimes and accelerated separation and transfer, thereafter affords better photoelectrochemical performance.204