Dissertation > Excellent graduate degree dissertation topics show

The Study of Carbon/Polymer Composite Counter Electrode for Dye-Sensitized Solar Cells

Author: ZhangXueNi
Tutor: ZhuYueJin;ZhangJing
School: Ningbo University
Course: Condensed Matter Physics
Keywords: Dye sensitized solar cells Carbon black polymer Counter electrode
CLC: TM914.4
Type: Master's thesis
Year: 2013
Downloads: 1
Quote: 0
Read: Download Dissertation

Abstract


Dye sensitized solar cell (DSSC) is a kind of new-style P-N junctionphotovoltaic device, which is according to principle of photosynthesis. Itpossesses rich materials, low cost, simple fabrication process, and no pollutionto the environment, which make it has a relatively stronger competitiveness inthe large-scale production. So the study about DSSC has great practicalsignificance. At present, the key to study of DSSC are how to improve theefficiency of converting light to electricity and stability of DSSC. To prolongthe service life of the cells is another important thing.The counter electrode is one of the most important components in theDSSCs, which strongly affects the fill factor and light-to-electricity of cells.For the moment, platinum-loaded conducting glass has already been widelyused as the standard for DSSC counter electrodes, because of its bettercatalytic activity forI-/I-3in the electrolyte. However, its expensive priceand rareness greatly limits its use. Metal substrate is difficult to employ forliquid-type DSSCs because theI-/I-3redox species in the electrolyte arecorrosive for it. Carbon material with low cost, high catalytic activity, andbetter conducting activity is a promising candidate for the replacement ofplatinum. Carbon counter electrode for the dye-sensitized solar cells isinvestigated in this paper.(1) Carbon black with low cost, high catalytic activity embedded in mixtures of poly(ethylene oxide) and poly(vinylidene fluoride-hexafluoropropylene) to make carbon/polymer composites slurry, whichwas deposited on transparent conducting glass substrate by doctor-bladecoating for application in dye-sensitized solar cells (DSSCs) as counterelectrode materials. The morphologies of carbon films were characterizedby scanning electron microscopy (SEM, SU-70, Japan). Electrochemicalimpedance spectroscopy (EIS) measurements were performed by anelectrochemical workstation (CHI650D, USA), which also gave the cyclicvoltammograms and bulk resistance of CEs. Functional films characteristictester (DHFC, China) was used to test square resistance of CEs. KLA-Tencor Alpha-step (IQ3, USA) was used to measure the thickness of films.The bulk conductivity of CEs is calculated.(2) The photocurrent–voltage (I–V) curves of cells were obtained bya Keithley model2400digital source meter. The irradiation source was asolar simulator (Newport, USA) that gave an AM1.5G illumination on thesurface of the solar cells. The incident light intensity (100mW cm-2) wascalibrated with a standard Si solar cell. We investigated the influence forDSSC from the concentration of carbon slurry and the thickness of carbonfilm. The experiments indicate that the photovoltaic parameters of DSSCsare strongly dependent on the carbon concentrations in the slurry. Thedevice with carbon counter electrode whose mass ratio is1:1(mass ratio=carbon black mass: polymers mass), exhibited an overall energyconversion efficiency of4.62%, which was comparable to5.32%of thatwith platinum as a counter electrode under the same test condition.

Related Dissertations

  1. Capsaicin / β - cyclodextrin system to dissolve and penetrate the,R943
  2. Soil Organic Carbon Fractions and Its Dynamic in Different Soil Types of Wuyi Mountains,S153.6
  3. Investigation of Preparation and Properties of Ordered Porous TiO2,TB383.2
  4. Preparation and Characteration of Composite Microspheres with Dual-, Triple- Responsive Properties,O631.3
  5. Studies on the Key Technology of the Grinding Device for the Polymer Particles,TQ315
  6. Synthesis and Characterization of Aromatic Amidinate Supramolecular and Phosphorus Imido Compounds,O621.2
  7. Molecularly Imprinted Polymer Microspheres and Evaluation,O631.3
  8. Acrylic acid - acrylamide superabsorbent properties of high-powered,TQ324.8
  9. Pyridine Metal Complexes electronic spectra and redox properties of theoretical research,O627
  10. Clinical Study of Biodegradable Polymer Stent Versus Durable Polymer Sirolimus Stent in Treating Diffused Coronary Lesions,R541.4
  11. Folate Modified Stearic Acid-G-Chitosan Oligosaccharide as a Gene Delivery Vector,R450
  12. Construction and Performance Research of the Sensing Systems for Monosacchrides,O629.112
  13. Flexible Electrodes Material Based on Polypyrrole Composites and Capacitance Properties for Supercapacitor,TM53
  14. Syntheses, Structures and Characteristics of Coordination Polymers with Bis-triazole,O633.5
  15. Novel Poly(histamine Acrylamide) (PHA) Based Cationic Polymers for Non-viral Gene Delivery,TQ460.1
  16. Study of the Polymer Synthetic Paper Formula and Papyraceous Performance,TS71
  17. Synthesis and Properties of Liquid Crystalline Monomers and Crosslinked Polymers Containing Menthyl Groups,O753.2
  18. Synthesis and Photovoltaic Properties of Low-bandgap Polymers Based on N-arylcarbazole,O626.2
  19. Syntheses, Structures, and Property Studies of Coordination Polymers Assembled from 2, 4-Dibenzoylisophthalic Acid,O634
  20. Preparation, Characterization, and Application in Polymer Composites of Graphene,TB383.1
  21. Preparation and Properties of Cd(Ⅱ)-Imprinted Thiol-Functionalized Micro-Bead Silica Gel Polymer,O631.3

CLC: > Industrial Technology > Electrotechnical > Independent power supply technology (direct power) > Photocell > Solar cells
© 2012 www.DissertationTopic.Net  Mobile