Abstract
The control of electrical and optical characteristics of 2D transition-metal dichalcogenides (TMDCs) through charge doping is essential to optimize the performances of optoelectronic devices based on TMDCs. In this study, a few-layer tungsten diselenide (WSe 2 ) is hybridized with organic gold(III)-tetraphenylporphyrin (Au-TPP) using a simple drop-casting method. Nanoscale optical characteristics, measured by laser confocal microscopy, reveal that the photoluminescence intensity and exciton lifetime of Au-TPP decrease after the hybridization with WSe 2 , which suggests the charge transfer from Au-TPP to WSe 2 . For optoelectronic applications, photoresponsive field-effect transistors (FETs) based on pristine WSe 2 and WSe 2 /Au-TPP hybrids are fabricated and compared. After the hybridization with Au-TPP, the charge transport characteristics of the WSe 2 -based FETs change to severe n-type characteristics including a negative shift of the threshold voltage and increase in electron mobility. Significantly enhanced photoresponsivities (up to 310 times) are observed for the WSe 2 /Au-TPP-based FETs owing to their efficient light absorption and charge transfer from Au-TPP to WSe 2 .
| Original language | English |
|---|---|
| Article number | 1800802 |
| Journal | Advanced Electronic Materials |
| DOIs | |
| Publication status | Published - 2019 Jan 1 |
Fingerprint
Keywords
- mobility
- photoresponsivity
- porphyrin derivatives
- transistors
- WSe
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
Cite this
Significantly Increased Photoresponsivity of WSe 2 -Based Transistors through Hybridization with Gold-Tetraphenylporphyrin as Efficient n-Type Dopant . / Lee, Dong Seop; Kim, Jun Young; Shin, Dae Yong; Lee, Yongjun; Kim, Jeongyong; Lee, Suk Joong; Joo, Jinsoo.
In: Advanced Electronic Materials, 01.01.2019.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Significantly Increased Photoresponsivity of WSe 2 -Based Transistors through Hybridization with Gold-Tetraphenylporphyrin as Efficient n-Type Dopant
AU - Lee, Dong Seop
AU - Kim, Jun Young
AU - Shin, Dae Yong
AU - Lee, Yongjun
AU - Kim, Jeongyong
AU - Lee, Suk Joong
AU - Joo, Jinsoo
PY - 2019/1/1
Y1 - 2019/1/1
N2 - The control of electrical and optical characteristics of 2D transition-metal dichalcogenides (TMDCs) through charge doping is essential to optimize the performances of optoelectronic devices based on TMDCs. In this study, a few-layer tungsten diselenide (WSe 2 ) is hybridized with organic gold(III)-tetraphenylporphyrin (Au-TPP) using a simple drop-casting method. Nanoscale optical characteristics, measured by laser confocal microscopy, reveal that the photoluminescence intensity and exciton lifetime of Au-TPP decrease after the hybridization with WSe 2 , which suggests the charge transfer from Au-TPP to WSe 2 . For optoelectronic applications, photoresponsive field-effect transistors (FETs) based on pristine WSe 2 and WSe 2 /Au-TPP hybrids are fabricated and compared. After the hybridization with Au-TPP, the charge transport characteristics of the WSe 2 -based FETs change to severe n-type characteristics including a negative shift of the threshold voltage and increase in electron mobility. Significantly enhanced photoresponsivities (up to 310 times) are observed for the WSe 2 /Au-TPP-based FETs owing to their efficient light absorption and charge transfer from Au-TPP to WSe 2 .
AB - The control of electrical and optical characteristics of 2D transition-metal dichalcogenides (TMDCs) through charge doping is essential to optimize the performances of optoelectronic devices based on TMDCs. In this study, a few-layer tungsten diselenide (WSe 2 ) is hybridized with organic gold(III)-tetraphenylporphyrin (Au-TPP) using a simple drop-casting method. Nanoscale optical characteristics, measured by laser confocal microscopy, reveal that the photoluminescence intensity and exciton lifetime of Au-TPP decrease after the hybridization with WSe 2 , which suggests the charge transfer from Au-TPP to WSe 2 . For optoelectronic applications, photoresponsive field-effect transistors (FETs) based on pristine WSe 2 and WSe 2 /Au-TPP hybrids are fabricated and compared. After the hybridization with Au-TPP, the charge transport characteristics of the WSe 2 -based FETs change to severe n-type characteristics including a negative shift of the threshold voltage and increase in electron mobility. Significantly enhanced photoresponsivities (up to 310 times) are observed for the WSe 2 /Au-TPP-based FETs owing to their efficient light absorption and charge transfer from Au-TPP to WSe 2 .
KW - mobility
KW - photoresponsivity
KW - porphyrin derivatives
KW - transistors
KW - WSe
UR - http://www.scopus.com/inward/record.url?scp=85061563380&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85061563380&partnerID=8YFLogxK
U2 - 10.1002/aelm.201800802
DO - 10.1002/aelm.201800802
M3 - Article
AN - SCOPUS:85061563380
JO - Advanced Electronic Materials
JF - Advanced Electronic Materials
SN - 2199-160X
M1 - 1800802
ER -