Improving the Performance of PbS Quantum Dot Solar Cells by Optimizing ZnO Window Layer.

ABSTRACT: Comparing with hot researches in absorber layer, window layer has attracted less attention in PbS quantum dot solar cells (QD SCs). Actually, the window layer plays a key role in exciton separation, charge drifting, and so on. Herein, ZnO window layer was systematically investigated for its roles in QD SCs performance. The physical mechanism of improved performance was also explored. It was found that the optimized ZnO films with appropriate thickness and doping concentration can balance the optical and electrical properties, and its energy band align well with the absorber layer for efficient charge extraction. Further characterizations demonstrated that the window layer optimization can help to reduce the surface defects, improve the heterojunction quality, as well as extend the depletio

SUBMITTER: Yang X 

PROVIDER: S-EPMC6223798 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature