High Performance PbS Quantum Dot/Graphene Hybrid Solar Cell with Efficient Charge Extraction.

Autor: Kim BS; Department of Engineering Science, University of Oxford , Parks Road, Oxford OX1 3PJ, U.K., Neo DC; Department of Materials, University of Oxford , Parks Road, Oxford OX1 3PH, U.K., Hou B; Department of Engineering Science, University of Oxford , Parks Road, Oxford OX1 3PJ, U.K., Park JB; 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., Cho Y; Department of Engineering Science, University of Oxford , Parks Road, Oxford OX1 3PJ, U.K., Zhang N; Department of Materials, University of Oxford , Parks Road, Oxford OX1 3PH, U.K., Hong J; Department of Engineering Science, University of Oxford , Parks Road, Oxford OX1 3PJ, U.K., Pak S; Department of Engineering Science, University of Oxford , Parks Road, Oxford OX1 3PJ, U.K., Lee S; Department of Engineering Science, University of Oxford , Parks Road, Oxford OX1 3PJ, U.K., Sohn JI; Department of Engineering Science, University of Oxford , Parks Road, Oxford OX1 3PJ, U.K., Assender HE; Department of Materials, University of Oxford , Parks Road, Oxford OX1 3PH, U.K., Watt AA; Department of Materials, University of Oxford , Parks Road, Oxford OX1 3PH, U.K., Cha S; Department of Engineering Science, University of Oxford , Parks Road, Oxford OX1 3PJ, U.K., Kim JM; Department of Engineering, University of Cambridge , 9 JJ Thomson Avenue, Cambridge CB3 0FA, U.K.
Jazyk: angličtina
Zdroj: ACS applied materials & interfaces [ACS Appl Mater Interfaces] 2016 Jun 08; Vol. 8 (22), pp. 13902-8. Date of Electronic Publication: 2016 May 23.
DOI: 10.1021/acsami.6b02544
Abstrakt: 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.
Databáze: MEDLINE