Work function engineering of graphene electrode via chemical doping

Yumeng Shi; Ki Kang Kim; Alfonso Reina; Mario Hofmann; Lain Jong Li; Jing Kong

doi:10.1021/nn1005478

Work function engineering of graphene electrode via chemical doping

Yumeng Shi, Ki Kang Kim, Alfonso Reina, Mario Hofmann, Lain Jong Li^*, Jing Kong

^*Corresponding author for this work

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

511 Scopus citations

Abstract

In this work, we demonstrate that graphene films synthesized by chemical vapor deposition (CVD) method can be used as thin transparent electrodes with tunable work function. By immersing the CVD-grown graphene films into AuCl ₃ solution, Au particles were formed on the surface of graphene films by spontaneous reduction of metal ions. The surface potential of graphene films can be adjusted (by up to ∼ 0.5 eV) by controlling the immersion time. Photovoltaic devices based on n-type silicon interfacing with graphene films were fabricated to demonstrate the benefit of an electrode with tunable work function. The maximum power conversion efficiency (PCE) achieved was ∼ 0.08%, which is more than 40 times larger than the devices without chemical doping.

Original language	English (US)
Pages (from-to)	2689-2694
Number of pages	6
Journal	ACS Nano
Volume	4
Issue number	5
DOIs	https://doi.org/10.1021/nn1005478
State	Published - May 25 2010
Externally published	Yes

Keywords

Doping
Graphene
Photovoltaic devices
Surface analysis

ASJC Scopus subject areas

General Materials Science
General Engineering
General Physics and Astronomy

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1021/nn1005478

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title = "Work function engineering of graphene electrode via chemical doping",

abstract = "In this work, we demonstrate that graphene films synthesized by chemical vapor deposition (CVD) method can be used as thin transparent electrodes with tunable work function. By immersing the CVD-grown graphene films into AuCl 3 solution, Au particles were formed on the surface of graphene films by spontaneous reduction of metal ions. The surface potential of graphene films can be adjusted (by up to ∼ 0.5 eV) by controlling the immersion time. Photovoltaic devices based on n-type silicon interfacing with graphene films were fabricated to demonstrate the benefit of an electrode with tunable work function. The maximum power conversion efficiency (PCE) achieved was ∼ 0.08%, which is more than 40 times larger than the devices without chemical doping.",

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year = "2010",

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doi = "10.1021/nn1005478",

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T1 - Work function engineering of graphene electrode via chemical doping

AU - Shi, Yumeng

AU - Kim, Ki Kang

AU - Reina, Alfonso

AU - Hofmann, Mario

AU - Li, Lain Jong

AU - Kong, Jing

PY - 2010/5/25

Y1 - 2010/5/25

N2 - In this work, we demonstrate that graphene films synthesized by chemical vapor deposition (CVD) method can be used as thin transparent electrodes with tunable work function. By immersing the CVD-grown graphene films into AuCl 3 solution, Au particles were formed on the surface of graphene films by spontaneous reduction of metal ions. The surface potential of graphene films can be adjusted (by up to ∼ 0.5 eV) by controlling the immersion time. Photovoltaic devices based on n-type silicon interfacing with graphene films were fabricated to demonstrate the benefit of an electrode with tunable work function. The maximum power conversion efficiency (PCE) achieved was ∼ 0.08%, which is more than 40 times larger than the devices without chemical doping.

AB - In this work, we demonstrate that graphene films synthesized by chemical vapor deposition (CVD) method can be used as thin transparent electrodes with tunable work function. By immersing the CVD-grown graphene films into AuCl 3 solution, Au particles were formed on the surface of graphene films by spontaneous reduction of metal ions. The surface potential of graphene films can be adjusted (by up to ∼ 0.5 eV) by controlling the immersion time. Photovoltaic devices based on n-type silicon interfacing with graphene films were fabricated to demonstrate the benefit of an electrode with tunable work function. The maximum power conversion efficiency (PCE) achieved was ∼ 0.08%, which is more than 40 times larger than the devices without chemical doping.

KW - Doping

KW - Graphene

KW - Photovoltaic devices

KW - Surface analysis

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Work function engineering of graphene electrode via chemical doping

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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