Photoelectrochemical performance of PbS/CdS quantum dot cosensitized TiO2 photoelectrodes

In this work, Narrow band gap CdS and PbS quantum dots are cosensitized TiO₂ NTWs array by successive ion layer absorption method(SILAR), and the photoelectrochemi-cal (PEC) performance of the heterostructures is investigated carefully, it is found that the photoelectric properties of QD/TiO₂ array film are superior to pure TiO₂ array film, and the PbS/CdS/TiO₂ array film exhibits the best performance, corres-ponding current density is 2.89mA/cm² and energy conversation efficiency is 1.68% under an illumination of AM 1.5G. PbS and CdS become a promising sensitized material with high quality properties for practical solar cell applications.