Photoinduced Electron Transfer in a MoS2/Anthracene Mixed-Dimensional Heterojunction in Aqueous Media

Tomoyuki Tajima; Shogo Okabe; Yutaka Takaguchi

doi:10.1246/bcsj.20200026

Photoinduced Electron Transfer in a MoS2/Anthracene Mixed-Dimensional Heterojunction in Aqueous Media

Tomoyuki Tajima, Shogo Okabe, Yutaka Takaguchi

Research output: Contribution to journal › Article › peer-review

Abstract

Mixed-dimensional (0D/2D) van der Waals heterojunctions were constructed by physical adsorption of anthracene (Anth) onto few-layer MoS2 nanosheets. The physical modification of few-layer MoS2 nanosheets using anthryl dendron 1, i.e., a poly(amidoamine) dendrimer having an anthracene core, via a simple yet efficient exfoliation approach afforded MoS2/1 hybrids, which are stable for at least one month. The emission quenching typical for anthracene is also observed in the MoS2/anthracene mixed-dimensional heterojunctions. Transient absorption measurements on MoS2/1 hybrids proved that photoinduced electron transfer occurs at the MoS2/anthracene interface. The lifetime of the singlet excited state (τS1(1Anth*)) for MoS2/1 was evaluated to be 4.1 ns, which is shorter than that of anthryl dendron 1 (13 ns). Interestingly, a remarkably long lifetime was observed for the anthracene cation radical (6.1 µs). Relatively long lifetimes of charge-separate states of MoS2/1 hybrids would be beneficial design features for efficient photovoltaics, photocatalysts, and related optoelectronic applications.

Original language	English
Pages (from-to)	745-750
Number of pages	6
Journal	Bulletin of the Chemical Society of Japan
Volume	93
Issue number	6
DOIs	https://doi.org/10.1246/bcsj.20200026
Publication status	Published - 2020
Externally published	Yes

Keywords

Molybdenum(IV) sulfide
Heterojunction
Charge transfer

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@article{458085fed15b481cbd966efd3806090c,

title = "Photoinduced Electron Transfer in a MoS2/Anthracene Mixed-Dimensional Heterojunction in Aqueous Media",

abstract = "Mixed-dimensional (0D/2D) van der Waals heterojunctions were constructed by physical adsorption of anthracene (Anth) onto few-layer MoS2 nanosheets. The physical modification of few-layer MoS2 nanosheets using anthryl dendron 1, i.e., a poly(amidoamine) dendrimer having an anthracene core, via a simple yet efficient exfoliation approach afforded MoS2/1 hybrids, which are stable for at least one month. The emission quenching typical for anthracene is also observed in the MoS2/anthracene mixed-dimensional heterojunctions. Transient absorption measurements on MoS2/1 hybrids proved that photoinduced electron transfer occurs at the MoS2/anthracene interface. The lifetime of the singlet excited state (τS1(1Anth*)) for MoS2/1 was evaluated to be 4.1 ns, which is shorter than that of anthryl dendron 1 (13 ns). Interestingly, a remarkably long lifetime was observed for the anthracene cation radical (6.1 µs). Relatively long lifetimes of charge-separate states of MoS2/1 hybrids would be beneficial design features for efficient photovoltaics, photocatalysts, and related optoelectronic applications.",

keywords = "Molybdenum(IV) sulfide, Heterojunction, Charge transfer",

author = "Tomoyuki Tajima and Shogo Okabe and Yutaka Takaguchi",

year = "2020",

doi = "10.1246/bcsj.20200026",

language = "English",

volume = "93",

pages = "745--750",

journal = "Bulletin of the Chemical Society of Japan",

issn = "0009-2673",

publisher = "Chemical Society of Japan",

number = "6",

}

TY - JOUR

T1 - Photoinduced Electron Transfer in a MoS2/Anthracene Mixed-Dimensional Heterojunction in Aqueous Media

AU - Tajima, Tomoyuki

AU - Okabe, Shogo

AU - Takaguchi, Yutaka

PY - 2020

Y1 - 2020

N2 - Mixed-dimensional (0D/2D) van der Waals heterojunctions were constructed by physical adsorption of anthracene (Anth) onto few-layer MoS2 nanosheets. The physical modification of few-layer MoS2 nanosheets using anthryl dendron 1, i.e., a poly(amidoamine) dendrimer having an anthracene core, via a simple yet efficient exfoliation approach afforded MoS2/1 hybrids, which are stable for at least one month. The emission quenching typical for anthracene is also observed in the MoS2/anthracene mixed-dimensional heterojunctions. Transient absorption measurements on MoS2/1 hybrids proved that photoinduced electron transfer occurs at the MoS2/anthracene interface. The lifetime of the singlet excited state (τS1(1Anth*)) for MoS2/1 was evaluated to be 4.1 ns, which is shorter than that of anthryl dendron 1 (13 ns). Interestingly, a remarkably long lifetime was observed for the anthracene cation radical (6.1 µs). Relatively long lifetimes of charge-separate states of MoS2/1 hybrids would be beneficial design features for efficient photovoltaics, photocatalysts, and related optoelectronic applications.

AB - Mixed-dimensional (0D/2D) van der Waals heterojunctions were constructed by physical adsorption of anthracene (Anth) onto few-layer MoS2 nanosheets. The physical modification of few-layer MoS2 nanosheets using anthryl dendron 1, i.e., a poly(amidoamine) dendrimer having an anthracene core, via a simple yet efficient exfoliation approach afforded MoS2/1 hybrids, which are stable for at least one month. The emission quenching typical for anthracene is also observed in the MoS2/anthracene mixed-dimensional heterojunctions. Transient absorption measurements on MoS2/1 hybrids proved that photoinduced electron transfer occurs at the MoS2/anthracene interface. The lifetime of the singlet excited state (τS1(1Anth*)) for MoS2/1 was evaluated to be 4.1 ns, which is shorter than that of anthryl dendron 1 (13 ns). Interestingly, a remarkably long lifetime was observed for the anthracene cation radical (6.1 µs). Relatively long lifetimes of charge-separate states of MoS2/1 hybrids would be beneficial design features for efficient photovoltaics, photocatalysts, and related optoelectronic applications.

KW - Molybdenum(IV) sulfide

KW - Heterojunction

KW - Charge transfer

U2 - 10.1246/bcsj.20200026

DO - 10.1246/bcsj.20200026

M3 - Article

VL - 93

SP - 745

EP - 750

JO - Bulletin of the Chemical Society of Japan

JF - Bulletin of the Chemical Society of Japan

SN - 0009-2673

IS - 6

ER -

Photoinduced Electron Transfer in a MoS<sub>2</sub>/Anthracene Mixed-Dimensional Heterojunction in Aqueous Media

Abstract

Keywords

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