Graphene Doping Improved Device Performance of ZnMgO/PbS Colloidal Quantum Dot Photovoltaics

ZnMgO/PbS colloidal quantum dot (CQD) photovotaics are constructed through incorporating graphene into the lead sulfide (PbS) CQD layer to improve the open circuit voltage and short circuit current of the device, resulting in a 9.0 ± 0.1% improvement. These devices also possess the advantages of ambient processing and high stability. The incorporation of 2D materials into PbS CQD film opens a new avenue for efficiency improvement of CQD photovoltaics.