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High performance PbS auantum dot/graphene hybrid solar cell with efficient charge extraction

Kim, Byung-Sung, Neo, Darren C. J., Hou, Bo, Park, Jong Bae, Cho, Yuljae, Zhang, Nanlin, Hong, John, Pak, Sangyeon, Lee, Sanghyo, Sohn, Jung Inn, Assender, Hazel E., Watt, Andrew A. R., Cha, SeungNam and Kim, Jong Min 2016. High performance PbS auantum dot/graphene hybrid solar cell with efficient charge extraction. ACS Applied Materials and Interfaces 8 (22) , pp. 13902-13908. 10.1021/acsami.6b02544

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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.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: American Chemical Society
ISSN: 1944-8244
Date of Acceptance: 13 May 2016
Last Modified: 25 Feb 2020 11:34

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