High-quality WS2film as a hole transport layer in high-efficiency non-fullerene organic solar cells

Xiaojing Wang; Peng Liu; Boonkar Yap; Ruidong Xia; Wai Yeung Wong; Zhicai He

doi:10.1039/d1nr03728e

High-quality WS₂film as a hole transport layer in high-efficiency non-fullerene organic solar cells

Xiaojing Wang, Peng Liu, Boonkar Yap, Ruidong Xia, Wai Yeung Wong, Zhicai He

Research output: Journal article publication › Journal article › Academic research › peer-review

11 Citations (Scopus)

Abstract

Liquid-exfoliated 2D transition metal disulfides (TMDs) are potential substitutes for poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) as hole transport layers (HTLs) in Organic Solar Cells (OSCs). Herein, high-yield and high-quality WS2 flake layers are prepared by comprehensively controlling the initial concentration, sonication processing time and centrifugal speed. The WS2 layers deposited on in situ transparent indium tin oxide (ITO) without plasma treatment show higher uniformity and conductivity than that formed on ITO after plasma treatment. With a significant increase in the short-circuit current density (JSC), the power conversion efficiency (PCE) of PM6:Y6-based non-fullerene OSCs using optimized WS2 as the HTL is higher than that using PEDOT:PSS as the HTL(15.75% vs. 15.31%). Combining the morphology characteristics with carrier recombination characteristics, the higher quality of the ITO/WS2 composite substrate leads to better charge transport and a lower bimolecular recombination rate in OSCs, thereby improving the device performance. This journal is

Original language	English
Pages (from-to)	16589-16597
Number of pages	9
Journal	Nanoscale
Volume	13
Issue number	39
DOIs	https://doi.org/10.1039/d1nr03728e
Publication status	Published - 21 Oct 2021

ASJC Scopus subject areas

Materials Science(all)

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10.1039/d1nr03728e

http://hdl.handle.net/10397/100049

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title = "High-quality WS2film as a hole transport layer in high-efficiency non-fullerene organic solar cells",

abstract = "Liquid-exfoliated 2D transition metal disulfides (TMDs) are potential substitutes for poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) as hole transport layers (HTLs) in Organic Solar Cells (OSCs). Herein, high-yield and high-quality WS2 flake layers are prepared by comprehensively controlling the initial concentration, sonication processing time and centrifugal speed. The WS2 layers deposited on in situ transparent indium tin oxide (ITO) without plasma treatment show higher uniformity and conductivity than that formed on ITO after plasma treatment. With a significant increase in the short-circuit current density (JSC), the power conversion efficiency (PCE) of PM6:Y6-based non-fullerene OSCs using optimized WS2 as the HTL is higher than that using PEDOT:PSS as the HTL(15.75% vs. 15.31%). Combining the morphology characteristics with carrier recombination characteristics, the higher quality of the ITO/WS2 composite substrate leads to better charge transport and a lower bimolecular recombination rate in OSCs, thereby improving the device performance. This journal is ",

author = "Xiaojing Wang and Peng Liu and Boonkar Yap and Ruidong Xia and Wong, {Wai Yeung} and Zhicai He",

note = "Funding Information: The authors thank the Guangdong Science and Technology Department (2020A0505100002), the Ministry of Science and Technology of the People{\textquoteright}s Republic of China (2017YFA0206600), the National Natural Science Foundation of China (21733005, 51861145301), the Tip-top Scientific and Technical Innovative Youth Talents of Guangdong Special Support Program (2017TQ04N559), the Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials (2019B121205002) and the Hong Kong Polytechnic University (1-ZE1C). Publisher Copyright: {\textcopyright} The Royal Society of Chemistry.",

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AU - Yap, Boonkar

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AU - Wong, Wai Yeung

AU - He, Zhicai

N1 - Funding Information: The authors thank the Guangdong Science and Technology Department (2020A0505100002), the Ministry of Science and Technology of the People’s Republic of China (2017YFA0206600), the National Natural Science Foundation of China (21733005, 51861145301), the Tip-top Scientific and Technical Innovative Youth Talents of Guangdong Special Support Program (2017TQ04N559), the Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials (2019B121205002) and the Hong Kong Polytechnic University (1-ZE1C). Publisher Copyright: © The Royal Society of Chemistry.

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N2 - Liquid-exfoliated 2D transition metal disulfides (TMDs) are potential substitutes for poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) as hole transport layers (HTLs) in Organic Solar Cells (OSCs). Herein, high-yield and high-quality WS2 flake layers are prepared by comprehensively controlling the initial concentration, sonication processing time and centrifugal speed. The WS2 layers deposited on in situ transparent indium tin oxide (ITO) without plasma treatment show higher uniformity and conductivity than that formed on ITO after plasma treatment. With a significant increase in the short-circuit current density (JSC), the power conversion efficiency (PCE) of PM6:Y6-based non-fullerene OSCs using optimized WS2 as the HTL is higher than that using PEDOT:PSS as the HTL(15.75% vs. 15.31%). Combining the morphology characteristics with carrier recombination characteristics, the higher quality of the ITO/WS2 composite substrate leads to better charge transport and a lower bimolecular recombination rate in OSCs, thereby improving the device performance. This journal is

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High-quality WS₂film as a hole transport layer in high-efficiency non-fullerene organic solar cells

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