title: High Performance PbS Quantum Dot/Graphene Hybrid Solar Cell with Efficient Charge Extraction.
abstract: Hybrid colloidal quantum dot (CQD) solar cells are fabricated from multilayer stacks of lead sulfide (PbS) CQD and single layer graphene (SG). The inclusion of graphene interlayers is shown to increase power conversion efficiency by 9.18%. It is shown that the inclusion of conductive graphene enhances charge extraction in devices. Photoluminescence shows that graphene quenches emission from the quantum dot suggesting spontaneous charge transfer to graphene. CQD photodetectors exhibit increased photoresponse and improved transport properties. We propose that the CQD/SG hybrid structure is a route to make CQD thin films with improved charge extraction, therefore resulting in improved solar cell efficiency.
authors.affiliation: Department of Engineering Science, University of Oxford , Parks Road, Oxford OX1 3PJ, U.K.
authors.forename: Byung-Sung
authors.initials: BS
authors.lastname: Kim
authors.affiliation: Department of Materials, University of Oxford , Parks Road, Oxford OX1 3PH, U.K.
authors.forename: Darren C J
authors.initials: DC
authors.lastname: Neo
authors.affiliation: Department of Engineering Science, University of Oxford , Parks Road, Oxford OX1 3PJ, U.K.
authors.forename: Bo
authors.initials: B
authors.lastname: Hou
authors.affiliation: Department of Engineering Science, University of Oxford , Parks Road, Oxford OX1 3PJ, U.K.|Jeonju Centre, Korea Basic Science Institute , Jeonju, Jeollabuk-do 561-180, Republic of Korea.
authors.forename: Jong Bae
authors.initials: JB
authors.lastname: Park
authors.affiliation: Department of Engineering Science, University of Oxford , Parks Road, Oxford OX1 3PJ, U.K.
authors.forename: Yuljae
authors.initials: Y
authors.lastname: Cho
authors.affiliation: Department of Materials, University of Oxford , Parks Road, Oxford OX1 3PH, U.K.
authors.forename: Nanlin
authors.initials: N
authors.lastname: Zhang
authors.affiliation: Department of Engineering Science, University of Oxford , Parks Road, Oxford OX1 3PJ, U.K.
authors.forename: John
authors.initials: J
authors.lastname: Hong
authors.affiliation: Department of Engineering Science, University of Oxford , Parks Road, Oxford OX1 3PJ, U.K.
authors.forename: Sangyeon
authors.initials: S
authors.lastname: Pak
authors.affiliation: Department of Engineering Science, University of Oxford , Parks Road, Oxford OX1 3PJ, U.K.
authors.forename: Sanghyo
authors.initials: S
authors.lastname: Lee
authors.affiliation: Department of Engineering Science, University of Oxford , Parks Road, Oxford OX1 3PJ, U.K.
authors.forename: Jung Inn
authors.initials: JI
authors.lastname: Sohn
authors.affiliation: Department of Materials, University of Oxford , Parks Road, Oxford OX1 3PH, U.K.
authors.forename: Hazel E
authors.initials: HE
authors.lastname: Assender
authors.affiliation: Department of Materials, University of Oxford , Parks Road, Oxford OX1 3PH, U.K.
authors.forename: Andrew A R
authors.initials: AA
authors.lastname: Watt
authors.affiliation: Department of Engineering Science, University of Oxford , Parks Road, Oxford OX1 3PJ, U.K.
authors.forename: SeungNam
authors.initials: S
authors.lastname: Cha
authors.affiliation: Department of Engineering, University of Cambridge , 9 JJ Thomson Avenue, Cambridge CB3 0FA, U.K.
authors.forename: Jong Min
authors.initials: JM
authors.lastname: Kim
keywords: Charge transfer; Exciton dissociation; Graphene; Hybrid solar cell; PbS quantum dot