Enhanced Power Conversion Efficiency via Hybrid Ligand Exchange Treatment of p-Type PbS Quantum Dots

Teh, Zhi Li (författare): Univ New South Wales UNSW, Australian Ctr Adv Photovolta, Sch Photovolta & Renewable Energy Engn, Sydney, NSW 2052, Australia

Hu, Long (författare): Univ New South Wales UNSW, Australian Ctr Adv Photovolta, Sch Photovolta & Renewable Energy Engn, Sydney, NSW 2052, Australia

Zhang, Zhilong (författare): Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

Gentle, Angus R. (författare): Univ Technol Sydney, Sch Math & Phys Sci, Ultimo, NSW 2007, Australia

Chen, Zihan (författare): Univ New South Wales UNSW, Australian Ctr Adv Photovolta, Sch Photovolta & Renewable Energy Engn, Sydney, NSW 2052, Australia

Gao, Yijun (författare): Univ New South Wales UNSW, Australian Ctr Adv Photovolta, Sch Photovolta & Renewable Energy Engn, Sydney, NSW 2052, Australia

Hu, Yicong (författare): Univ New South Wales UNSW, Australian Ctr Adv Photovolta, Sch Photovolta & Renewable Energy Engn, Sydney, NSW 2052, Australia

Wu, Tom (författare): Univ New South Wales UNSW, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia

Patterson, Robert J. (författare): Univ New South Wales UNSW, Australian Ctr Adv Photovolta, Sch Photovolta & Renewable Energy Engn, Sydney, NSW 2052, Australia

Huang, Shujuan (författare): Univ New South Wales UNSW, Australian Ctr Adv Photovolta, Sch Photovolta & Renewable Energy Engn, Sydney, NSW 2052, Australia; Macquarie Univ, Sch Engn, Sydney, NSW 2109, Australia

(creator_code:org_t)

2020-04-29
2020
Engelska.
Ingår i: ACS Applied Materials and Interfaces. - : American Chemical Society (ACS). - 1944-8244 .- 1944-8252. ; 12:20, s. 22751-22759

Relaterad länk:: https://opus.lib.uts...; visa fler...; https://urn.kb.se/re...; https://doi.org/10.1...; visa färre...

Abstract Ämnesord

Stäng

PbS quantum dot solar cells (QDSCs) have emerged as a promising low-cost, solution-processable solar energy harvesting device and demonstrated good air stability and potential for large-scale commercial implementation. PbS QDSCs achieved a record certified efficiency of 12% in 2018 by utilizing an n+–n–p device structure. However, the p-type layer has generally suffered from low carrier mobility due to the organic ligand 1,2-ethanedithiol (EDT) that is used to modify the quantum dot (QD) surface. The low carrier mobility of EDT naturally limits the device thickness as the carrier diffusion length is limited by the low mobility. Herein, we improve the properties of the p-type layer through a two-step hybrid organic ligand treatment. By treating the p-type layer with two types of ligands, 3-mercaptopropionic acid (MPA) and EDT, the PbS QD surface was passivated by a combination of the two ligands, resulting in an overall improvement in open-circuit voltage, fill factor, and current density, leading to an improvement in the cell efficiency from 7.0 to 10.4% for the champion device. This achievement was a result of the improved QD passivation and a reduction in the interdot distance, improving charge transport through the p-type PbS quantum dot film.

Av författaren/redakt...: Teh, Zhi Li; Hu, Long; Zhang, Zhilong; Gentle, Angus R.; Chen, Zihan; Gao, Yijun; visa fler...; Yuan, Lin; Hu, Yicong; Wu, Tom; Patterson, Rober ...; Huang, Shujuan; visa färre...

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