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Deep Ultraviolet to Near-Infrared Emission and Photoresponse in Layered N-Doped Graphene Quantum Dots

ESI高被引SCI-EEI
WOS被引频次:149
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成果类型:
期刊论文
作者:
Tang, Libin;Ji, Rongbin;Li, Xueming;Bai, Gongxun;Liu, Chao Ping;Hao, Jianhua;Lin, Jingyu;Jiang, Hongxing;Teng, Kar Seng;Yang, Zhibin;Lau, Shu Ping
通讯作者:
Lau, S.P.(apsplau@polyu.edu.hk)
作者机构:
[ Lin, Jingyu ; Jiang, Hongxing ] Department of Electrical and Computer Engineering, Texas Tech University, Lubbock, TX 79409, United States
[ Lau, Shu Ping ; Liu, Chao Ping ; Tang, Libin ; Hao, Jianhua ; Bai, Gongxun ; Yang, Zhibin ] Department of Applied Physics, Hong Kong Polytechnic University, Hong Kong, Hong Kong
[Tang, Libin ; Ji, Rongbin ] Kunming Institute of Physics, Kunming 650223, Yunnan Province, China
[ Teng, Kar Seng ] Multidisciplinary Nanotechnology Center, College of Engineering, Swansea University, Singleton Park, Swansea SA2 8PP, United Kingdom
[ Li, Xueming ] Solar Energy Research Institute, Yunnan Normal University, Kunming 650092, China
通讯机构:
[Lau, SP] Hong Kong Polytech Univ, Dept Appl Phys, Hong Kong, Hong Kong, Peoples R China.
语种:
英文
关键词:
Broadband emission - Broadband modulators - Fiber communications - Layered Structures - Near-infrared emissions - Nitrogen-doped graphene - Nitrogen-doping - Photoresponses
期刊:
ACS NANO
ISSN:
1936-0851
年:
2014
卷:
8
期:
6
页码:
6312-6320
文献类别:
WOS:Article;EI:Journal article (JA)
所属学科:
ESI学科类别:化学;WOS学科类别:Chemistry, Multidisciplinary;Chemistry, Physical;Materials Science, Multidisciplinary;Nanoscience & Nanotechnology
入藏号:
WOS:000338089200099;EI:20142717901125
基金类别:
Research Grants Council of Hong Kong [PolyU 5013/09P]; HK PolyU [G-YN10, 1-ZV8N, 1-ZE14]; Key Project of Applied Basic Research of Yunnan Province [2012FA003]; National Natural Science Foundation of China [11374250, 61106098, 61066004]; NSF [DMR-1206652]
机构署名:
本校为其他机构
院系归属:
能源与环境科学学院(太阳能研究所)
摘要:
Material that can emit broad spectral wavelengths covering deep ultraviolet, visible, and near-infrared is highly desirable. It can lead to important applications such as broadband modulators, photodetectors, solar cells, bioimaging, and fiber communications. However, there is currently no material that meets such desirable requirement. Here, we report the layered structure of nitrogen-doped graphene quantum dots (N-GQDs) which possess broadband emission ranging from 300 to >1000 nm. The broadband emission is attributed to the layered structure of the N-GQDs that contains a large conjugated system and provides extensive delocalized πelectrons. In addition, a broadband photodetector with responsivity as high as 325 V/W is demonstrated by coating N-GQDs onto interdigital gold electrodes. The unusual negative photocurrent is observed which is attributed to the trapping sites induced by the self-passivated surface states in the N-GQDs. ©2014 American Chemical Society.
参考文献:
Bao L, 2011, ADV MATER, V23, P5801, DOI 10.1002/adma.201102866
Biedermann LB, 2009, PHYS REV B, V79, DOI 10.1103/PhysRevB.79.125411
Bonaccorso F, 2010, NAT PHOTONICS, V4, P611, DOI [10.1038/nphoton.2010.186, 10.1038/NPHOTON.2010.186]
Ci L, 2010, NAT MATER, V9, P430, DOI 10.1038/nmat2711
Gass MH, 2008, NAT NANOTECHNOL, V3, P676, DOI 10.1038/nnano.2008.280

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