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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.

SUBMITTER: Kim BS

PROVIDER: S-EPMC4928821 | biostudies-literature | 2016 Jun

REPOSITORIES: biostudies-literature

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

Kim Byung-Sung BS Neo Darren C J DC Hou Bo B Park Jong Bae JB Cho Yuljae Y Zhang Nanlin N Hong John J Pak Sangyeon S Lee Sanghyo S Sohn Jung Inn JI Assender Hazel E HE Watt Andrew A R AA Cha SeungNam S Kim Jong Min JM

ACS applied materials & interfaces 20160523 22

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 p ...[more]

PMID: 27213219

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