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ZnO/graphene compound nano structure photo-anode for dye-sensitized solar cell and manufacture method of ZnO/graphene compound nano structure photo-anode

A graphene composite, solar cell technology, applied in circuits, capacitors, photovoltaic power generation and other directions, can solve the problems of graphene not being introduced and complicated, and achieve the effect of reducing electronic composite loss, low cost, and improving short-circuit current.

Inactive Publication Date: 2013-02-27
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, graphene has not been introduced into ZnO nanostructured photoanodes so far due to the complicated photoanode preparation process.

Method used

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  • ZnO/graphene compound nano structure photo-anode for dye-sensitized solar cell and manufacture method of ZnO/graphene compound nano structure photo-anode
  • ZnO/graphene compound nano structure photo-anode for dye-sensitized solar cell and manufacture method of ZnO/graphene compound nano structure photo-anode
  • ZnO/graphene compound nano structure photo-anode for dye-sensitized solar cell and manufacture method of ZnO/graphene compound nano structure photo-anode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Graphite oxide was prepared by the Hummers method, washed with deionized water and centrifuged at a speed of 10000~20000r / min, after repeated washing and centrifuged to obtain pure graphite oxide, which was ultrasonically dispersed in deionized water A graphene oxide solution with a concentration of 1 mg / mL was obtained.

[0031] (2) ZnAc 2 2H 2 O is dissolved in ethylene glycol, prepared into a solution with a concentration of 0.05~0.5 mol / L, heated to 150~200°C, condensed and refluxed for 4~24 hours for solvothermal reaction, and then the product is centrifuged and washed repeatedly with ethanol. Finally, it is dried to become a white ZnO nanoparticle powder.

[0032] (3) Dissolve polyvinyl alcohol in hot water at 70~100°C, and then further dilute it with ethanol aqueous solution prepared at a volume ratio of 1:1 to prepare a viscous liquid with a mass content of 5% polyvinyl alcohol.

[0033] (4) Add ZnO nanoparticle white powder and graphene oxide solution to...

Embodiment 2

[0037] (1) Graphite oxide was prepared by the Hummers method, washed with deionized water and centrifuged at a speed of 10000~20000r / min, after repeated washing and centrifuged to obtain pure graphite oxide, which was dispersed in ethanol by ultrasonic to obtain The concentration is 3 mg / mL graphene oxide solution.

[0038] (2) ZnAc 2 2H 2O is dissolved in ethylene glycol, prepared into a solution with a concentration of 0.05~0.5 mol / L, heated to 150~200°C, condensed and refluxed for 4~24 hours for solvothermal reaction, and then the product is centrifuged and washed repeatedly with ethanol. Finally, it is dried to become a white ZnO nanoparticle powder.

[0039] (3) Dissolve polyvinyl alcohol in hot water at 70~100°C, and then further dilute it with ethanol aqueous solution prepared at a volume ratio of 1:1 to prepare a viscous liquid with a mass content of 10% polyvinyl alcohol.

[0040] (4) Add ZnO nanoparticle white powder and graphene oxide solution to the viscous liqu...

Embodiment 3

[0044] (1) Graphite oxide was prepared by the Hummers method, washed with deionized water and centrifuged at a speed of 10000~20000r / min, after repeated washing and centrifuged to obtain pure graphite oxide, which was ultrasonically dispersed in deionized water A graphene oxide solution with a concentration of 5 mg / mL was obtained.

[0045] (2) ZnAc 2 2H 2 O is dissolved in ethylene glycol, prepared into a solution with a concentration of 0.05~0.5 mol / L, heated to 150~200°C, condensed and refluxed for 4~24 hours for solvothermal reaction, and then the product is centrifuged and washed repeatedly with ethanol. Finally, it is dried to become a white ZnO nanoparticle powder.

[0046] (3) Dissolve polyvinyl alcohol in hot water at 70~100°C, and then further dilute it with ethanol aqueous solution prepared at a volume ratio of 1:1 to prepare a viscous liquid with a mass content of 10% polyvinyl alcohol.

[0047] (4) Add ZnO nanoparticle white powder and graphene oxide solution t...

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Abstract

The invention discloses a ZnO / graphene compound nano structure photo-anode for a dye-sensitized solar cell and a manufacture method of the ZnO / graphene compound nano structure photo-anode. The ZnO / graphene compound nano structure photo-anode is of a ZnO / graphene compound nano structure comprising ZnO nano particles with graphene with excellent electronic transmission property, and is manufactured on a conductive substrate by adopting a screen printing process. Because the graphene is introduced to be used as a collection and transmission channel of optical excitation electrons, compared with the existing ZnO nano particle photo-anode which is not added with graphene, the ZnO / graphene compound nano structure photo-anode disclosed by the invention has the advantages that the electron compound loss is effectively reduced, simultaneously the light absorption efficiency of the solar cell can be increased, and the short-circuit current of the solar cell is remarkably increased, therefore, the photovoltaic conversion efficiency of the solar cell is increased. Meanwhile, the ZnO / graphene compound nano structure photo-anode has the advantages of simpleness in operation of the manufacture method and procedures, low cost and capability of large-scale production.

Description

[0001] technical field [0002] The invention belongs to the field of nano-energy materials, and relates to the preparation of new nano-material graphene and its composite material film, in particular to a ZnO / graphene composite nanostructure photoanode for a dye-sensitized solar cell and a preparation method thereof. [0003] Background technique [0004] In recent years, dye-sensitized solar cells using ZnO as photoanode materials have attracted increasing attention. ZnO has abundant nanostructure morphology, becoming TiO 2 One of the substitutes for photoanode materials. So far, ZnO nanoparticles, one-dimensional ZnO nanowire / rod arrays, and two-dimensional ZnO nanosheet arrays have been extensively studied. The ZnO nanoparticle photoanode has a large surface area, but the electron recombination loss is serious; the array structure photoanode has a fast electron linear transmission channel, which can effectively avoid the electron recombination loss, but this single na...

Claims

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Application Information

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IPC IPC(8): H01G9/20H01G9/042
CPCY02E10/542Y02E10/549Y02P70/50
Inventor 徐峰孙立涛郭立勇朱媛媛张义彭富林陈凯王豪丁楠黄俊
Owner SOUTHEAST UNIV
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