Photoluminescence and Raman studies of graphene thin films prepared by reduction of graphene oxide

被引:177
|
作者
Cuong, Tran Viet [1 ]
Pham, Viet Hung [1 ]
Tran, Quang Trung [2 ]
Hahn, Sung Hong [3 ]
Chung, Jin Suk [1 ]
Shin, Eun Woo [1 ]
Kim, Eui Jung [1 ]
机构
[1] Univ Ulsan, Dept Chem Engn, Ulsan 680749, South Korea
[2] Ho Chi Minh City Univ Nat Sci, Fac Phys, Dept Solid State Phys, Ho Chi Minh City, Vietnam
[3] Univ Ulsan, Dept Phys, Ulsan 680749, South Korea
关键词
Graphene oxide; Thin films; Luminescence; Optical materials and properties; GRAPHITE OXIDE; FUNCTIONALIZED GRAPHENE; NANOSHEETS; CARBON;
D O I
10.1016/j.matlet.2009.11.029
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Photoluminescence (PL) and Raman studies have been performed to investigate the optical properties of graphene thin films prepared by chemical and thermal reductions of graphene oxide (GO). The G peak in Raman spectra red-shifted after reduction of GO. Thermal reduction resulted in a more red-shift of the G peak than chemical reduction. A strong intensity of the D peak indicated that the prepared graphene films have significant structural disorders. A blue-shifted emission in PL spectra suggested that sp(2) clusters are embedded in a sp(3) matrix that acts as a tunnel barrier, causing a strong fluctuation in the local band gap. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码:399 / 401
页数:3
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