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Method for preparing polymer emulsion of optical anode of dye sensitization battery

A dye-sensitized battery and polymer emulsion technology, which is applied in the field of dye-sensitized solar cell materials, can solve the problems that fossil energy cannot meet the long-term needs of human beings, and achieve the effect of improving photoelectric conversion efficiency and increasing short-circuit current

Active Publication Date: 2010-09-01
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as a non-renewable energy source, fossil energy cannot meet the long-term needs of human beings.

Method used

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  • Method for preparing polymer emulsion of optical anode of dye sensitization battery
  • Method for preparing polymer emulsion of optical anode of dye sensitization battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment is an experiment of preparing a device by using a polymer sol.

[0028] The polymer sol, including 2.6 grams of TiO2 (particle diameter 21nm), 7ml styrene and butyl acrylate copolymer emulsion (molar ratio is 1: 1, solid content 50%, emulsion particle diameter is 100nm), 10ml water, in conductive Scratch the film on the glass, and then sinter at 450°C for 30 minutes. After the temperature is cooled to about 100°C, put the electrode piece into 5mM N3 / ethanol solution and soak for 12 hours, take it out and rinse it with absolute ethanol, dry it, and use a standard Solid electrolyte, platinum-coated conductive glass as a counter electrode, assembled into a battery. Under the simulated sunlight irradiation of 30mW / cm2, the measured open circuit voltage of the battery is 0.69V, the short circuit current is 3.50mA / cm2, the fill factor is 0.64, and the total photoelectric conversion efficiency is 5.2%.

Embodiment 2

[0030] This embodiment is an experiment of using polymer sol and adding admixtures to improve film formation and prepare devices.

[0031] With polymer sol, comprise 3.6 gram TiO2 (particle diameter 21nm), 7ml styrene and butyl acrylate (molar ratio is 1: 1) copolymer emulsion (solid content 57%, emulsion particle diameter is 300nm), 20ml water, 0.46ml Triton, scratch the film on the conductive glass, and then sinter at 450°C for 30 minutes. After the temperature is cooled to about 100°C, soak the electrode piece in 5mM N3 / ethanol solution for 12 hours, take it out with anhydrous Rinse with ethanol, dry in the air, use quasi-solid electrolyte, platinum-plated conductive glass as the counter electrode, and assemble into a battery. Under the simulated sunlight irradiation of 30mW / cm2, the measured open-circuit voltage of the battery is 0.75V, the short-circuit current is 3.8mA / cm2, the fill factor is 0.63, and the total photoelectric conversion efficiency is 6.0%.

Embodiment 3

[0033] This example is an experiment to verify the stability of the polymer sol.

[0034] The polymer sol in Example 2 remained unchanged in its apparent state after standing for one month, and was still a viscous white emulsion. Scraping the film in this way, the efficiency obtained by preparing the battery is basically the same as that of the battery in Example 2, wherein the open circuit voltage is 0.59V, the short circuit current is 5.2mA / cm2, the fill factor is 0.69, and the total photoelectric conversion efficiency is 5.4%. This example shows that the stability of the polymer sol is very good, and the film formation after standing for a period of time will not affect the efficiency of the battery.

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Abstract

The invention relates to a method for processing polymer emulsion of a photo anode in a dye sensitization battery, which belongs to the field of dye sensitization solar batteries. The method comprises utilizing emulsion to scatter metallic oxide particles, firstly, achieving the even scattering of nanometer particles through the self-assembling of nanometer particles and emulsion particles to prevent birdnesting, increasing specific surface area of an electrode after film forming, increasing dye adsorbance and light absorption efficiency, and improving photoelectric transformation efficiency of a solar energy battery, secondly, forming a three-dimensional bicontinuous structure whose size can be controlled through the self assembling, providing a transmission channel between an electric charge and a positive hole, improving drift velocity of electric charges, and increasing electric charge collection efficiency and photocurrent, thirdly, leading the operation of emulsion preparation to be simple and convenient, and forming stable scattering, preparing emulsion to be transmitted in packaging after nanometer particles are produced, and preventing metallic oxide nanometer particles from birdnesting in the process of storing. The photoelectric transformation efficiency of a battery can be improved at least 20% through utilizing an emulsion scattering method to prepare electrodes. Colloids which can be suitable for different film forming techniques can be got through modulating an emulsion formula.

Description

technical field [0001] The invention relates to the field of dye-sensitized solar cell materials, in particular to preparing electrodes with ordered structures by emulsion method. Background technique [0002] At present, 80% of the world's energy comes from fossil fuels represented by petroleum and coal. With the rapid increase of world population and the rapid development of human society, the growth and consumption of human energy demand are also getting faster and faster. But as non-renewable energy, fossil energy cannot meet the long-term needs of human beings. People's demand for environmentally friendly renewable energy technology is becoming more and more urgent. With its unique advantages, solar cells have attracted people's attention and are considered to be the most promising new energy utilization method. [0003] The amount of solar energy resources is very huge, and it is almost not limited by geographical conditions, and has no impact on the environment. Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/18H01G9/20H01M14/00
CPCY02E10/542Y02P70/50
Inventor 邱勇李焦丽王立铎马蓓蓓孔祥明詹纯吴骅
Owner TSINGHUA UNIV
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