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Graphene–Organic Two-Dimensional Charge-Transfer Complexes: Intermolecular Electronic Transitions and Broadband Near-Infrared Photoresponse

Menghua Cui, Yuzheng Guo Orcid Logo, Yiming Zhu, Haining Liu, Wen Wen, Juanxia Wu, Linxiu Cheng, Qingdao Zeng, Liming Xie

The Journal of Physical Chemistry C, Volume: 122, Issue: 13, Pages: 7551 - 7556

Swansea University Author: Yuzheng Guo Orcid Logo

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DOI (Published version): 10.1021/acs.jpcc.8b01408

Abstract

Charge-transfer (CT) complexes with unique intermolecular electronic transitions have attracted broad interest and hold great potential in optoelectronic applications. Here, we report a new family of two-dimensional graphene-organic molecule CT complexes. Density functional theory (DFT) calculation...

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Published in: The Journal of Physical Chemistry C
ISSN: 1932-7447 1932-7455
Published: 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa39464
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last_indexed 2018-06-04T19:01:08Z
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spelling 2018-06-04T14:49:49.0032661 v2 39464 2018-04-18 Graphene–Organic Two-Dimensional Charge-Transfer Complexes: Intermolecular Electronic Transitions and Broadband Near-Infrared Photoresponse 2c285ab01f88f7ecb25a3aacabee52ea 0000-0003-2656-0340 Yuzheng Guo Yuzheng Guo true false 2018-04-18 GENG Charge-transfer (CT) complexes with unique intermolecular electronic transitions have attracted broad interest and hold great potential in optoelectronic applications. Here, we report a new family of two-dimensional graphene-organic molecule CT complexes. Density functional theory (DFT) calculation has revealed low-energy CT bands in the near-infrared (NIR) region up to 2000 nm for graphene-TCNQ (tetracyanoquinodimethane), graphene-F4TCNQ (2,3,5,6-Tetrafluoro-tetracyanoquinodimethane) and graphene-TCOQ (tetrachloro-o-benzoquinone) complexes. Raman and electrical measurements have confirmed a partial charge transfer between graphene and the molecules at the ground state. CT excitations have been calculated by DFT and verified by optoelectronic measurements. The graphene–organic CT complexes have shown a broadband photoresponse from the visible to NIR range, attributed to the intermolecular electronic transitions. Further, the photoresponsivity (up to 103 A/W) suggests a high photoelectrical gain arising from the photogating effect at the graphene/molecule interface. At last, the photoresponse property of the graphene–organic CT complexes can be tuned by electrical gating of graphene. Journal Article The Journal of Physical Chemistry C 122 13 7551 7556 1932-7447 1932-7455 5 4 2018 2018-04-05 10.1021/acs.jpcc.8b01408 COLLEGE NANME General Engineering COLLEGE CODE GENG Swansea University 2018-06-04T14:49:49.0032661 2018-04-18T09:31:23.0548707 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - General Engineering Menghua Cui 1 Yuzheng Guo 0000-0003-2656-0340 2 Yiming Zhu 3 Haining Liu 4 Wen Wen 5 Juanxia Wu 6 Linxiu Cheng 7 Qingdao Zeng 8 Liming Xie 9 0039464-30042018122012.pdf cui2018.pdf 2018-04-30T12:20:12.3870000 Output 1226655 application/pdf Accepted Manuscript true 2019-03-15T00:00:00.0000000 true eng
title Graphene–Organic Two-Dimensional Charge-Transfer Complexes: Intermolecular Electronic Transitions and Broadband Near-Infrared Photoresponse
spellingShingle Graphene–Organic Two-Dimensional Charge-Transfer Complexes: Intermolecular Electronic Transitions and Broadband Near-Infrared Photoresponse
Yuzheng Guo
title_short Graphene–Organic Two-Dimensional Charge-Transfer Complexes: Intermolecular Electronic Transitions and Broadband Near-Infrared Photoresponse
title_full Graphene–Organic Two-Dimensional Charge-Transfer Complexes: Intermolecular Electronic Transitions and Broadband Near-Infrared Photoresponse
title_fullStr Graphene–Organic Two-Dimensional Charge-Transfer Complexes: Intermolecular Electronic Transitions and Broadband Near-Infrared Photoresponse
title_full_unstemmed Graphene–Organic Two-Dimensional Charge-Transfer Complexes: Intermolecular Electronic Transitions and Broadband Near-Infrared Photoresponse
title_sort Graphene–Organic Two-Dimensional Charge-Transfer Complexes: Intermolecular Electronic Transitions and Broadband Near-Infrared Photoresponse
author_id_str_mv 2c285ab01f88f7ecb25a3aacabee52ea
author_id_fullname_str_mv 2c285ab01f88f7ecb25a3aacabee52ea_***_Yuzheng Guo
author Yuzheng Guo
author2 Menghua Cui
Yuzheng Guo
Yiming Zhu
Haining Liu
Wen Wen
Juanxia Wu
Linxiu Cheng
Qingdao Zeng
Liming Xie
format Journal article
container_title The Journal of Physical Chemistry C
container_volume 122
container_issue 13
container_start_page 7551
publishDate 2018
institution Swansea University
issn 1932-7447
1932-7455
doi_str_mv 10.1021/acs.jpcc.8b01408
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - General Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - General Engineering
document_store_str 1
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description Charge-transfer (CT) complexes with unique intermolecular electronic transitions have attracted broad interest and hold great potential in optoelectronic applications. Here, we report a new family of two-dimensional graphene-organic molecule CT complexes. Density functional theory (DFT) calculation has revealed low-energy CT bands in the near-infrared (NIR) region up to 2000 nm for graphene-TCNQ (tetracyanoquinodimethane), graphene-F4TCNQ (2,3,5,6-Tetrafluoro-tetracyanoquinodimethane) and graphene-TCOQ (tetrachloro-o-benzoquinone) complexes. Raman and electrical measurements have confirmed a partial charge transfer between graphene and the molecules at the ground state. CT excitations have been calculated by DFT and verified by optoelectronic measurements. The graphene–organic CT complexes have shown a broadband photoresponse from the visible to NIR range, attributed to the intermolecular electronic transitions. Further, the photoresponsivity (up to 103 A/W) suggests a high photoelectrical gain arising from the photogating effect at the graphene/molecule interface. At last, the photoresponse property of the graphene–organic CT complexes can be tuned by electrical gating of graphene.
published_date 2018-04-05T03:50:07Z
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score 11.036706

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