ZnO quantum dots-graphene composite for efficient ultraviolet sensing

Dali Shao; Xiang Sun; Ming Xie; Hongtao Sun; Fengyuan Lu; Steven M. George; Jie Lian; Shayla Sawyer

doi:10.1016/j.matlet.2013.09.031

ZnO quantum dots-graphene composite for efficient ultraviolet sensing

Dali Shao, Xiang Sun, Ming Xie, Hongtao Sun, Fengyuan Lu, Steven M. George, Jie Lian, Shayla Sawyer

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

23 Scopus citations

Abstract

ZnO quantum dots-graphene (QDs-graphene) composite was synthesized using atomic layer deposition method. A photodetector fabricated from the ZnO QDs-graphene composite and polymers demonstrated high sensitivity to UV light with a maximum photoresponsivity of 247 A/W at 325 nm. The high photoresponsivity of this device is attributed to the high active surface to volume ratio of the ZnO QDs-graphene composite. In addition to the high photoresponsivity, fast transient response with response time on the order of tenth of milliseconds was achieved, which is attributed to high carrier transport and collection efficiency through the graphene.

Original language	English (US)
Pages (from-to)	165-168
Number of pages	4
Journal	Materials Letters
Volume	112
DOIs	https://doi.org/10.1016/j.matlet.2013.09.031
State	Published - 2013
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Keywords

Graphene
Photodetector
Ultraviolet
ZnO quantum dot

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10.1016/j.matlet.2013.09.031

Cite this

@article{7e1062a285bf4bb39491b28cf7662432,

title = "ZnO quantum dots-graphene composite for efficient ultraviolet sensing",

abstract = "ZnO quantum dots-graphene (QDs-graphene) composite was synthesized using atomic layer deposition method. A photodetector fabricated from the ZnO QDs-graphene composite and polymers demonstrated high sensitivity to UV light with a maximum photoresponsivity of 247 A/W at 325 nm. The high photoresponsivity of this device is attributed to the high active surface to volume ratio of the ZnO QDs-graphene composite. In addition to the high photoresponsivity, fast transient response with response time on the order of tenth of milliseconds was achieved, which is attributed to high carrier transport and collection efficiency through the graphene.",

keywords = "Graphene, Photodetector, Ultraviolet, ZnO quantum dot",

author = "Dali Shao and Xiang Sun and Ming Xie and Hongtao Sun and Fengyuan Lu and George, {Steven M.} and Jie Lian and Shayla Sawyer",

note = "Funding Information: The authors gratefully acknowledge support from National Security Technologies through NSF Industry/University Cooperative Research Center Connection One. The authors also acknowledge the National Science Foundation Smart Lighting Engineering Research Center ( EEC-0812056 ) and a NSF career award DMR-1151028 . The work at the University of Colorado was supported by DARPA .",

year = "2013",

doi = "10.1016/j.matlet.2013.09.031",

language = "English (US)",

volume = "112",

pages = "165--168",

journal = "Materials Letters",

issn = "0167-577X",

publisher = "Elsevier",

}

TY - JOUR

T1 - ZnO quantum dots-graphene composite for efficient ultraviolet sensing

AU - Shao, Dali

AU - Sun, Xiang

AU - Xie, Ming

AU - Sun, Hongtao

AU - Lu, Fengyuan

AU - George, Steven M.

AU - Lian, Jie

AU - Sawyer, Shayla

N1 - Funding Information: The authors gratefully acknowledge support from National Security Technologies through NSF Industry/University Cooperative Research Center Connection One. The authors also acknowledge the National Science Foundation Smart Lighting Engineering Research Center ( EEC-0812056 ) and a NSF career award DMR-1151028 . The work at the University of Colorado was supported by DARPA .

PY - 2013

Y1 - 2013

N2 - ZnO quantum dots-graphene (QDs-graphene) composite was synthesized using atomic layer deposition method. A photodetector fabricated from the ZnO QDs-graphene composite and polymers demonstrated high sensitivity to UV light with a maximum photoresponsivity of 247 A/W at 325 nm. The high photoresponsivity of this device is attributed to the high active surface to volume ratio of the ZnO QDs-graphene composite. In addition to the high photoresponsivity, fast transient response with response time on the order of tenth of milliseconds was achieved, which is attributed to high carrier transport and collection efficiency through the graphene.

AB - ZnO quantum dots-graphene (QDs-graphene) composite was synthesized using atomic layer deposition method. A photodetector fabricated from the ZnO QDs-graphene composite and polymers demonstrated high sensitivity to UV light with a maximum photoresponsivity of 247 A/W at 325 nm. The high photoresponsivity of this device is attributed to the high active surface to volume ratio of the ZnO QDs-graphene composite. In addition to the high photoresponsivity, fast transient response with response time on the order of tenth of milliseconds was achieved, which is attributed to high carrier transport and collection efficiency through the graphene.

KW - Graphene

KW - Photodetector

KW - Ultraviolet

KW - ZnO quantum dot

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U2 - 10.1016/j.matlet.2013.09.031

DO - 10.1016/j.matlet.2013.09.031

M3 - Article

AN - SCOPUS:84884897117

SN - 0167-577X

VL - 112

SP - 165

EP - 168

JO - Materials Letters

JF - Materials Letters

ER -

ZnO quantum dots-graphene composite for efficient ultraviolet sensing

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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