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Investigation of Dye Sensitized Solar Cell

Author: WuCongCong
Tutor: LiJian；ChiBo
School: Huazhong University of Science and Technology
Course: Materials Science and Engineering
Keywords: Dye-sensitized solar cells TiO2 nanotubes Flexible Large panel
CLC: TM914.4
Type: Master's thesis
Year: 2009
Downloads: 162
Quote: 0
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Abstract


The dye-sensitized solar cells (DSSC) is a new type of photoelectrochemical solar cells, it has the advantages of low production cost, simple fabrication process, a rich source of raw materials and environmentally friendly has become the focus of research in the field of new energy development. , DSSC forward the development of the direction of diversification, using one-dimensional semiconductor nanomaterials as a linear electron transport capacity DSSC photoanode become a hot research; another prepared panel and flexible bendable battery DSSC current development trend. In summary, this paper three aspects TiO 2 nanotube DSSC, the flexible DSSC large panel DSSC-based study. (1) using the organic solution of the higher viscosity as a the anodizing electrolyte solvent preparation of TiO 2 nanotube arrays. Explore the anodizing process parameters morphology of the nanotubes, developed high aspect ratio TiO 2 nanotube arrays preparation process; TiO 2 nanotubes as DSSC photoanode photoelectric performance testing, and discuss the impact of the morphology of the TiO 2 nanotubes on the battery performance. The results show that: the oxidation voltage and time is conducive for high aspect ratio nanotubes, 50 V oxidation of ethylene glycol electrolyte containing 0.5 wt% NH4F 17 h were prepared aspect ratio of 313.4 TiO 2 < 0.659 V / sub> nanotube arrays; 13 h 40 V oxidation of ethylene glycol electrolyte containing 0.5 wt% NH4F prepared by TiO 2 nanotubes by Ti (OBu) 4 treatment available The open circuit voltage of 6.98 mA / cm 2 of the short-circuit current and photoelectric conversion efficiency of 2.43%. (2) TiO 2 nanotubes add, sol-gel method and reaction sintering method at low temperatures Preparation of nanocrystalline TiO 2 thin film electrode of TiO 2 thin film electrode surface quality, as well as film and substrate bonding strength, tested and the different cryogenic prepared DSSC's photoelectric properties and contrast. The results show that: TiO 2 nano-particle films add TiO 2 nanotubes can increase the bonding strength of the film as well as film and substrate, the photoelectric performance of DSSC with TiO 2 nanotube content increase and improve, containing 20 wt% TiO 2 nanotube DSSC by Ti (OBu) 4 treatment available 0.724 V the open circuit voltage and 4.15 mA / cm 2 of the short-circuit current; prepared by the sol-gel method on the ITO glass of DSSC open circuit voltage of 0.634 V, a short circuit current of 2.35 mA / cm 2 , prepared on conductive polymer substrate ITO / PET DSSC open circuit voltage and short circuit current is less than the ITO glass; reaction sintering law in regard to the sol-gel method to obtain better particle TiO 2 connectivity DSSC electrochemical impedance spectroscopy DSSC open circuit voltage of 0.682 V, a short circuit current of 4.27 mA / cm 2 . (3) research panel DSSC preparation process to explore DSSC area its photoelectric performance. The parallel structure size in preparation for a large panel of 40 mm × 50 mm DSSC, and DSSC photoelectric performance test. The results showed that: decreases rapidly with the short-circuit current and fill factor in the increase of the area of ??DSSC the DSSC voltammetry characteristic curve gradually becomes a straight line; parallel structure DSSC using silver metal gate electrode to collect current, can reduce the current in the conductive substrate ohmic losses, improve the photoelectric performance of DSSC. The TiCl 4 processing photoanode area of ??6.48 cm 2 large panel DSSC available open-circuit voltage of 0.763 V, 10.83 mA / cm 2 The short-circuit current, photoelectric conversion efficiency of 3.93%.

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