Negative and positive persistent photoconductance in graphene

Chandan Biswas; Fethullah Güneş; Dinh Loc Duong; Seong Chu Lim; Mun Seok Jeong; Didier Pribat; Young Hee Lee

doi:10.1021/nl202266h

Negative and positive persistent photoconductance in graphene

Chandan Biswas
, Fethullah Güneş
, Dinh Loc Duong
, Seong Chu Lim
, Mun Seok Jeong
, Didier Pribat
, Young Hee Lee

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

102 Scopus citations

Abstract

Persistent photoconductance, a prolonged light-induced conducting behavior that lasts several hundred seconds, has been observed in semiconductors. Here we report persistent negative photoconductance and consecutive prominent persistent positive photoconductance in graphene. Unusually large yields of negative PC (34%) and positive PC (1652%) and remarkably long negative transient response time (several hours) were observed. Such high yields were reduced in multilayer graphene and were quenched under vacuum conditions. Two-dimensional metallic graphene strongly interacts with environment and/or substrate, causing this phenomenon, which is markedly different from that in three-dimensional semiconductors and nanoparticles.

Original language	English
Pages (from-to)	4682-4687
Number of pages	6
Journal	Nano Letters
Volume	11
Issue number	11
DOIs	https://doi.org/10.1021/nl202266h
State	Published - 9 Nov 2011
Externally published	Yes

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10.1021/nl202266h

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title = "Negative and positive persistent photoconductance in graphene",

abstract = "Persistent photoconductance, a prolonged light-induced conducting behavior that lasts several hundred seconds, has been observed in semiconductors. Here we report persistent negative photoconductance and consecutive prominent persistent positive photoconductance in graphene. Unusually large yields of negative PC (34\%) and positive PC (1652\%) and remarkably long negative transient response time (several hours) were observed. Such high yields were reduced in multilayer graphene and were quenched under vacuum conditions. Two-dimensional metallic graphene strongly interacts with environment and/or substrate, causing this phenomenon, which is markedly different from that in three-dimensional semiconductors and nanoparticles.",

author = "Chandan Biswas and Fethullah G{\"u}ne{\c s} and Duong, \{Dinh Loc\} and Lim, \{Seong Chu\} and Jeong, \{Mun Seok\} and Didier Pribat and Lee, \{Young Hee\}",

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doi = "10.1021/nl202266h",

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T1 - Negative and positive persistent photoconductance in graphene

AU - Biswas, Chandan

AU - Güneş, Fethullah

AU - Duong, Dinh Loc

AU - Lim, Seong Chu

AU - Jeong, Mun Seok

AU - Pribat, Didier

AU - Lee, Young Hee

PY - 2011/11/9

Y1 - 2011/11/9

N2 - Persistent photoconductance, a prolonged light-induced conducting behavior that lasts several hundred seconds, has been observed in semiconductors. Here we report persistent negative photoconductance and consecutive prominent persistent positive photoconductance in graphene. Unusually large yields of negative PC (34%) and positive PC (1652%) and remarkably long negative transient response time (several hours) were observed. Such high yields were reduced in multilayer graphene and were quenched under vacuum conditions. Two-dimensional metallic graphene strongly interacts with environment and/or substrate, causing this phenomenon, which is markedly different from that in three-dimensional semiconductors and nanoparticles.

AB - Persistent photoconductance, a prolonged light-induced conducting behavior that lasts several hundred seconds, has been observed in semiconductors. Here we report persistent negative photoconductance and consecutive prominent persistent positive photoconductance in graphene. Unusually large yields of negative PC (34%) and positive PC (1652%) and remarkably long negative transient response time (several hours) were observed. Such high yields were reduced in multilayer graphene and were quenched under vacuum conditions. Two-dimensional metallic graphene strongly interacts with environment and/or substrate, causing this phenomenon, which is markedly different from that in three-dimensional semiconductors and nanoparticles.

UR - https://www.scopus.com/pages/publications/80755189451

U2 - 10.1021/nl202266h

DO - 10.1021/nl202266h

M3 - Article

C2 - 21972980

AN - SCOPUS:80755189451

SN - 1530-6984

VL - 11

SP - 4682

EP - 4687

JO - Nano Letters

JF - Nano Letters

IS - 11

ER -

Negative and positive persistent photoconductance in graphene

Abstract

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