Semitransparent PV windows with sputtered CdS/CdTe thin films

Photovoltaic devices have been increasingly relied upon for distributed power generation at various levels (portable power, residential, commercial and municipal). One particularly appealing option for PV devices is their incorporation as building-integrated or vehicle-integrated structures which would serve both electrical generation and aesthetic requirements. Two particular embodiments of this application are semitransparent PV windows and curtain walls for residential/commercial buildings as well as PV sunroofs for vehicles. The technology of semitransparent PV modules with good photo-conversion efficiency and electrical performance is non-trivial. This report discusses the use of ultrathin devices based upon CdS/CdTe films augmented with color shifting technologies to meet these requirements.