Inverted colloidal quantum dot solar cells

Abstract

An inverted architecture of quantum dot solar cells is demonstrated by introducing a novel ZnO method on top of the PbS CQD film. Improvements in device characteristics stem from constructive optical interference from the ZnO layer that enhances absorption in the PbS CQD layer. Outstanding diode characteristics arising from a superior PbS/ZnO junction provide a further electronic advantage.

Keywords: depleted heterojunction; lead sulfide; nanoparticles; quantum dot solar cells; zinc oxide.