J. Semicond. > Volume 39 > Issue 2 > Article Number: 023001

Composite structure of ZnO films coated with reduced graphene oxide: structural, electrical and electrochemical properties

Weiqiang Shuai , Yuehui Hu , , Yichuan Chen , Keyan Hu , Xiaohua Zhang , Wenjun Zhu , Fan Tong and Zixuan Lao

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Abstract: ZnO films coated with reduced graphene oxide (RGO-ZnO) were prepared by a simple chemical approach. The graphene oxide (GO) films transferred onto ZnO films by spin coating were reduced to RGO films by two steps (exposed to hydrazine vapor for 12 h and annealed at 600 °C). The crystal structures, electrical and photoluminescence properties of RGO-ZnO films on quartz substrates were systematically studied. The SEM images illustrated that RGO layers have successfully been coated on the ZnO films very tightly. The PL properties of RGO-ZnO were studied. PL spectra show two sharp peaks at 390 nm and a broad visible emission around 490 nm. The resistivity of RGO-ZnO films was measured by a Hall measurement system, RGO as nanofiller considerably decrease the resistivity of ZnO films. An electrode was fabricated, using RGO-ZnO films deposited on Si substrate as active materials, for super capacitor application. By comparison of different results, we conclude that the RGO-ZnO composite material couples possess the properties of super capacitor.

Key words: RGO-ZnO filmsspin coatingelectrodesuper capacitor application

Abstract: ZnO films coated with reduced graphene oxide (RGO-ZnO) were prepared by a simple chemical approach. The graphene oxide (GO) films transferred onto ZnO films by spin coating were reduced to RGO films by two steps (exposed to hydrazine vapor for 12 h and annealed at 600 °C). The crystal structures, electrical and photoluminescence properties of RGO-ZnO films on quartz substrates were systematically studied. The SEM images illustrated that RGO layers have successfully been coated on the ZnO films very tightly. The PL properties of RGO-ZnO were studied. PL spectra show two sharp peaks at 390 nm and a broad visible emission around 490 nm. The resistivity of RGO-ZnO films was measured by a Hall measurement system, RGO as nanofiller considerably decrease the resistivity of ZnO films. An electrode was fabricated, using RGO-ZnO films deposited on Si substrate as active materials, for super capacitor application. By comparison of different results, we conclude that the RGO-ZnO composite material couples possess the properties of super capacitor.

Key words: RGO-ZnO filmsspin coatingelectrodesuper capacitor application



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[1]

Rambu A P, Iftimie N, Rusu G I. Influence of the substrate nature on the properties of ZnO thin films. J Gilded Age Progress Era, 2015, 4(2): 320

[2]

Huang L, Guo G, Liu Y, et al. Synthesis of reduced graphene oxide/ZnO nanorods composites on graphene coated PET flexible substrates. Mater Res Bull, 2013, 48(10): 4163

[3]

Zaretskaya E P, Gremenok V F, Semchenko A V, et al. Structural properties of ZnO:Al films produced by the sol–gel technique. Semiconductors, 2015, 49(10): 1253

[4]

Alver U, Zhou W, Belay A B, et al. Optical and structural properties of ZnO nanorods grown on graphene oxide and reduced graphene oxide film by hydrothermal method. Appl Surf Sci, 2012, 258(7): 3109

[5]

Wang M, Le D D, Oh J S, et al. A comparison study between ZnO nanorods coated with graphene oxide and reduced graphene oxide. J Alloys Compnd, 2014, 582(2): 29

[6]

Huang L, Guo G, Liu Y, et al. Synthesis of reduced graphene oxide/ZnO nanorods composites on graphene coated PET flexible substrates. Mater Res Bull, 2013, 48(10): 4163

[7]

Xun Z, Shi T, Zhou H. Hydrothermal preparation of ZnO-reduced graphene oxide hybrid with high performance in photocatalytic degradation. Appl Surf Sci, 2012, 258(17): 6204

[8]

Aunkor M T H, Mahbubul I M, Saidur R, et al. The green reduction of graphene oxide. Rsc Adv, 2016, 6(33): 27807

[9]

Becerril H A, Mao J, Liu Z, et al. Evaluation of solution-processed reduced graphene oxide films as transparent conductors. ACS Nano, 2008, 2(3): 463

[10]

Wang J, Tsuzuki T, Tang B, et al. Reduced graphene oxide/ZnO composite: reusable adsorbent for pollutant management. Acs Appl Mater Interfaces, 2012, 4(6): 3084

[11]

Fang D, Yao P, Li H. Influence of annealing temperature on the structural and optical properties of Mg–Al co-doped ZnO thin films prepared via sol–gel method. Ceram Int, 2014, 40(4): 5873

[12]

Qurashi A, Subrahmanyam K S, Kumar P. Nanofiller graphene–ZnO hybrid nanoarchitecture: optical, electrical and optoelectronic investigation. J Mater Chem C, 2015, 3(45): 11959

[13]

Saranya M, Ramachandran R, Wang F. Graphene-zinc oxide (G-ZnO) nanocomposite for electrochemical supercapacitor applications. J Sci Adv Mater Devices, 2016, 1(4): 454

[14]

Ding J, Yan X, Xue Q. Study on field emission and photoluminescence properties of ZnO/graphene hybrids grown on Si substrates. Mater Chem Phys, 2012, 133(1): 405

[15]

Kavitha T, Gopalan A I, Lee K P, et al. Glucose sensing, photocatalytic and antibacterial properties of graphene–ZnO nanoparticle hybrids. Carbon, 2012, 50(8): 2994

[16]

Watcharotone S, Dikin D A, Stankovich S, et al. Graphene-silica composite thin films as transparent conductors. Nano Lett, 2007, 7(7): 1888

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W Q Shuai, Y H Hu, Y C Chen, K Y Hu, X H Zhang, W J Zhu, F Tong, Z X Lao. Composite structure of ZnO films coated with reduced graphene oxide: structural, electrical and electrochemical properties[J]. J. Semicond., 2018, 39(2): 023001. doi: 10.1088/1674-4926/39/2/023001.

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History

Manuscript received: 26 April 2017 Manuscript revised: 23 June 2017 Online: Corrected proof: 15 November 2017 Uncorrected proof: 24 January 2018 Accepted Manuscript: 02 February 2018 Published: 02 February 2018

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