SHI Yong-sheng, LIU Dan-ni, CAO Zhong-lin, MA Meng-fei, YANG Wei-wei. Preparation of Graphene Flexible Transparent Conductive Films[J]. , 2013,28(2): 166-172
SHI Yong-sheng, LIU Dan-ni, CAO Zhong-lin, MA Meng-fei, YANG Wei-wei. Preparation of Graphene Flexible Transparent Conductive Films[J]. , 2013,28(2): 166-172 DOI: 10.3788/YJYXS20132802.0166.
Preparation of Graphene Flexible Transparent Conductive Films
Graphite powder as the raw material was directly sonicated in organic solvents by the liquid-phase exfoliation method
to produce high quality graphene dispersion through a high-speed centrifugation. The spray-coating method was used to prepare transparent and conductive graphene films based on flexible substrates (PET). The influence of different organic solvents and substrate treatments on the surface morphology and photoelectric properties of graphene films was studied by SEM and four-point probe tester characterization methods. The results show that graphene films are less structural defects and don't introduce other functional groups by using DMF as the dispersant. The substrate processed with silver metal grid can effectively reduce sheet resistance of the film
and the sheet resistance is reduced to 172 /□ when the transmittance is 81% (
=550 nm).This new structure of graphene/silver metal grid flexible transparent conductive film is expected to replace the market mainstream ITO film.
关键词
Keywords
references
Zhao J, Pei S, Ren W, et al. Efficient preparation of large-area graphene oxide sheets for transparent conductive films [J]. ACS Nano, 2010, 4(9):5245-5252.[2] Cao Q, Rogers O J A. Ultrathin films of single-walled carbon nanotubes for electronics and sensors: a review of fundamental and applied aspects [J]. Adv. Mater., 2009, 21(1):29-53.[3] 庞渊源.石墨烯在半导体光电器件的应用[J].液晶与显示,2011,26(3):296-300.[4] Chongmin L, Jaehui A, Ki B L, et al. Graphene-based flexible NO2 chemical sensors[J]. Thin Solid Films, 2012, 520(16):5459-5462.[5] Helena G , I-Chun C, Sigurd W, et al. Mechanics of thin-film transistors and solar cells on fiexible substrates [J]. Solar Energy, 2006, 80(6):687-693.[6] Ju S, Facchetti A, Xuan Y, et al. Fabrication of fully transparent nanowire transistors for transparent and flexible electronics [J].Nat. Nanotech., 2007, 2(6):378-384. [7] Sekitani T, Nakajima H, Maeda H, et al. Stretchable active -matrix organic light-emitting diode display using printable elastic condoctors [J]. Nat. Mater., 2009,8(6):494-499.[8] Geim A K, Novoselov K S. The rise of graphene [J].Nat. Mater., 2007, 6(3):183-191.[9] Nair R R, Blake P, Grigorenko A N, et al. Fine structure constant defines visual transparency of graphene [J]. Science, 2008, 320(5881):1308-1311.[10] Lee C, Wei X D, Kysar J W, et al. Measurement of the elastic properties and intrinsic strength of monolayer graphene[J]. Science, 2008, 321(5887):385-388.[11] Geim A K. Graphene:status and prospects [J].Science, 2009, 324(5934):1530-1534.[12] Novoselov K S, Geim A K, Morozcv S V, et al. Electric field effect in atomically thin carbon films [J].Science, 2004, 306(2):666-669.[13] Berger C, Song Z, Li X, et al. Electronic confinement and coherence in patterned epitaxial graphene [J]. Science, 2006, 312(5777):1191-1196.[14] Subrahmanyam K S, Govindaraj A, Rao C N R, et al. Simple method of preparing graphene flakes by an arc-discharge method [J].Phys. Chem. C, 2009, 113(11):4257-4260.[15] Schniepp H C, Li J-L, Mcallister M J, et al. Functionalized single graphene sheets derived from splitting graphite oxide [J].J. Phys. Chem. B, 2006, 110(17):8535-8539. [16] Wei Z, Paui S, Brian H, et al. Wafer-scale reduced graphene oxide flms for nano mechanical devices[J]. Nano Lett., 2008, 8(10):3441-3445.[17] Gao W, Aiemany L B, Ci L J, et al.New insights into the structure and reduction of graphite oxide[J]. Nat. Chem., 2009, 1(5):403-408.[18] Bae S, Kim H, Lee Y, et al. Roll-to-roll production of 30-inch graphene films for transparent electrodes [J]. Nat. Nanotech., 2010, 5(8):574-578.[19] Aibert D, Velimir R, Zonghoon L, et al. Substrate-free gas-phase synthesis of grapheme sheets [J]. Nano Lett., 2008, 8(7):2012-2016.[20] Reina A, Jia x T, Ho J, et al. Large Area, few-layer graphene films on arbitrary substrates by chemical vapor deposition [J]. Nano Lett., 2009, 9(1):30-35.[21] Mohammad C, Pall T, John A S. Gram-scale production of graphene based on solvothermal synthesis and sonication [J].Nat. Nanotech., 2009, 4(11):30-33.[22] Hernandez Y, Nicolosi V, Lotya M, et al.High-yield production of graphene by liquid-phase exfoliafion of graphite [J]. Nat. Nanotech., 2008, 3(9):563-568.[23] Pham V H, Cuong T V, Hur S H, et al.Fast and simple fabrication of a large transparent chemically-converted graphene film by spray-coating [J]. Carbon, 2010, 48(7):1945-1951. [24] Nair R R, Blake P, Grigorenko A N, et al. Fine structure constant defines visual transparency of graphene [J].Science, 2008, 320(6):1308-1314.[25] Cai W, Zhu Y, Li X, et al.Large area few-layer graphene/graphite films as transparent thin conducting electrodes [J]. Appl. Phys. Lett., 2009, 95(12):123115-123118.