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Study on Dye-sensitized Solar Cells Based on ZnO Branched Nanostructure Arrays

Author: ShangXiaoYing
Tutor: FangXiaoMing
School: South China University of Technology
Course: Energy and environmental materials and technology
Keywords: Dye-sensitized solar cells ZnO Nanoarray Hierarchical composite nanostructures Solution growth method
CLC: TM914.4
Type: Master's thesis
Year: 2010
Downloads: 232
Quote: 1
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Abstract


Dye-sensitized solar cell is a high efficiency, low cost solar cells is an important direction of development. A semiconductor porous film that hinders the dye-sensitized solar cells photoelectric conversion efficiency of the key components. This paper first grown on conductive glass substrate are arranged parallel to each other and perpendicular to the substrate, one-dimensional ZnO single crystal nanorods, and then by means of additives DAP in different planes of ZnO crystal preferential adsorption characteristics of the ZnO hexagonal nano- Stick six branches grow out of the surface structure, the formation of ZnO branched nanorod array films, designed to keep the nanorods excellent transmission characteristics based on ZnO nanostructures by increasing the specific surface area of ??the membrane to increase the amount of dye adsorption and improve incident The capture efficiency of light, thereby improving the dye-sensitized photoelectric conversion efficiency of solar cells. A two-step solution growth method with Zn (NO 3 ) 2 · 6H 2 O and HMT mixture for growing system, first in grown on conductive glass one-dimensional ZnO nanorod arrays, and then added to the solution in the growth of 1,3 - diaminopropane (DAP) for secondary growth, synthesis of ZnO nanorod arrays Multibranch; using SEM of ZnO nanostructures surface morphology were characterized; using XRD structure of the synthesized composite crystal analysis; using MATLAB6.5 system nanorods diameter and length measurement; using UV spectrophotometer composite structure of the dye adsorption. Systematically investigated whether the seed, once growth concentration, secondary growth concentration, additive concentration and other factors on the growth patterns of secondary growth of ZnO nanostructures hierarchical composite diameter, length, density and other microstructural parameters. Through experiments, when there is no seed, a concentration of 0.03M, secondary concentration of 0.05M, additive concentration of 0.08M, a growth temperature of 90 ℃, the growth time of 6h, secondary growth temperature is 60 ℃, secondary Total time 6h growth and the use of hierarchical growth mode, can be prepared by uniformly distributed, structural integrity, clarity and better performance of dye adsorption ZnO composite nanostructure films. The optimal conditions for the ZnO nanocrystals XRD, fluorescence spectroscopy, spectroscopy and absorption spectroscopy characterization, and into the light by the N719-sensitized anode and platinum counter electrode assembly into a sandwich structure between two electrodes Note plus constitutes the electrolyte dye-sensitized solar cells, optical and electrical properties of the battery test. The results showed that: Based on the optimized ZnO nanostructured composite film dye-sensitized photoelectric conversion efficiency of solar cells up to 1.66%. Also, try the composite nanostructures of ZnO surface parcel TiO 2 , were characterized and N719, respectively, and produced P3HT/PCBM as sensitizer dye-sensitized photoanode battery assembly for optoelectronic performance test, study the parcel TiO 2 films on the battery performance.

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CLC: > Industrial Technology > Electrotechnical > Independent power supply technology (direct power) > Photocell > Solar cells
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