Improve photocurrent quantum efficiency of carbon nanotube by chemical treatment

Hongguang Wang; Jinquan Wei; Yi Jia; Zhen Li; Hongwei Zhu; Kunlin Wang; Dehai Wu

doi:10.1016/j.matchemphys.2011.10.033

Improve photocurrent quantum efficiency of carbon nanotube by chemical treatment

Hongguang Wang, Jinquan Wei, Yi Jia, Zhen Li, Hongwei Zhu, Kunlin Wang, Dehai Wu

Ministry of Education of the People's Republic of China

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

1 Scopus citations

Abstract

High photocurrent quantum efficiency (QE) of carbon nanotubes (CNTs) is important to their photovoltaic applications. The ability of photocurrent generation of CNTs depends on their band structure and surface state. For given CNTs, it is possible to improve the QE of photocurrent by chemical modification. Here, we study the effects of simple chemical treatment on the QE of CNTs by measuring the photocurrent of macroscopic CNT bundles. The QE of the H ₂O ₂-treated CNT bundle reaches 5.28% at 0.1 V bias voltage at a laser (λ = 473 nm) illumination, which is 85% higher than that of the pristine sample. But the QE of the CNTs treated in concentrated HNO ₃ is lower than that of the pristine sample. It shows that moderate chemical treatment can enhance the photocurrent QE and excessive chemical treatment will decrease the QE because of introducing lots of structural defects.

Original language	English
Pages (from-to)	680-685
Number of pages	6
Journal	Materials Chemistry and Physics
Volume	131
Issue number	3
DOIs	https://doi.org/10.1016/j.matchemphys.2011.10.033
State	Published - 5 Jan 2012
Externally published	Yes

Keywords

Chemical techniques
Defects
Nanostructures
Visible and ultraviolet spectrometers

UN SDGs

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

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10.1016/j.matchemphys.2011.10.033

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title = "Improve photocurrent quantum efficiency of carbon nanotube by chemical treatment",

abstract = "High photocurrent quantum efficiency (QE) of carbon nanotubes (CNTs) is important to their photovoltaic applications. The ability of photocurrent generation of CNTs depends on their band structure and surface state. For given CNTs, it is possible to improve the QE of photocurrent by chemical modification. Here, we study the effects of simple chemical treatment on the QE of CNTs by measuring the photocurrent of macroscopic CNT bundles. The QE of the H 2O 2-treated CNT bundle reaches 5.28% at 0.1 V bias voltage at a laser (λ = 473 nm) illumination, which is 85% higher than that of the pristine sample. But the QE of the CNTs treated in concentrated HNO 3 is lower than that of the pristine sample. It shows that moderate chemical treatment can enhance the photocurrent QE and excessive chemical treatment will decrease the QE because of introducing lots of structural defects.",

keywords = "Chemical techniques, Defects, Nanostructures, Visible and ultraviolet spectrometers",

author = "Hongguang Wang and Jinquan Wei and Yi Jia and Zhen Li and Hongwei Zhu and Kunlin Wang and Dehai Wu",

year = "2012",

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doi = "10.1016/j.matchemphys.2011.10.033",

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T1 - Improve photocurrent quantum efficiency of carbon nanotube by chemical treatment

AU - Wang, Hongguang

AU - Wei, Jinquan

AU - Jia, Yi

AU - Li, Zhen

AU - Zhu, Hongwei

AU - Wang, Kunlin

AU - Wu, Dehai

PY - 2012/1/5

Y1 - 2012/1/5

N2 - High photocurrent quantum efficiency (QE) of carbon nanotubes (CNTs) is important to their photovoltaic applications. The ability of photocurrent generation of CNTs depends on their band structure and surface state. For given CNTs, it is possible to improve the QE of photocurrent by chemical modification. Here, we study the effects of simple chemical treatment on the QE of CNTs by measuring the photocurrent of macroscopic CNT bundles. The QE of the H 2O 2-treated CNT bundle reaches 5.28% at 0.1 V bias voltage at a laser (λ = 473 nm) illumination, which is 85% higher than that of the pristine sample. But the QE of the CNTs treated in concentrated HNO 3 is lower than that of the pristine sample. It shows that moderate chemical treatment can enhance the photocurrent QE and excessive chemical treatment will decrease the QE because of introducing lots of structural defects.

AB - High photocurrent quantum efficiency (QE) of carbon nanotubes (CNTs) is important to their photovoltaic applications. The ability of photocurrent generation of CNTs depends on their band structure and surface state. For given CNTs, it is possible to improve the QE of photocurrent by chemical modification. Here, we study the effects of simple chemical treatment on the QE of CNTs by measuring the photocurrent of macroscopic CNT bundles. The QE of the H 2O 2-treated CNT bundle reaches 5.28% at 0.1 V bias voltage at a laser (λ = 473 nm) illumination, which is 85% higher than that of the pristine sample. But the QE of the CNTs treated in concentrated HNO 3 is lower than that of the pristine sample. It shows that moderate chemical treatment can enhance the photocurrent QE and excessive chemical treatment will decrease the QE because of introducing lots of structural defects.

KW - Chemical techniques

KW - Defects

KW - Nanostructures

KW - Visible and ultraviolet spectrometers

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U2 - 10.1016/j.matchemphys.2011.10.033

DO - 10.1016/j.matchemphys.2011.10.033

M3 - 文章

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SN - 0254-0584

VL - 131

SP - 680

EP - 685

JO - Materials Chemistry and Physics

JF - Materials Chemistry and Physics

IS - 3

ER -

Improve photocurrent quantum efficiency of carbon nanotube by chemical treatment

Abstract

Keywords

UN SDGs

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