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Dye sensitized solar battery counter electrode and manufacture method thereof

A technology for solar cells and dye sensitization, which is applied in the field of low-cost dye-sensitized solar cell counter electrodes and their preparation, can solve the problems of low electrocatalytic activity, poor conductivity, development limitations, etc., and achieves easy preparation, excellent photoelectric performance, low cost effect

Inactive Publication Date: 2011-09-07
NANKAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbon materials have good electrical conductivity and low cost, but the problem is that their intrinsic electrocatalytic activity is low, which limits their further development
In addition, CN 200910068409.6 discloses that transition metal nitrides have high electrocatalytic activity as counter electrode materials, but in terms of practical applications, pure metal nitrides have poor conductivity and are easy to agglomerate, which will lead to a decrease in performance

Method used

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  • Dye sensitized solar battery counter electrode and manufacture method thereof
  • Dye sensitized solar battery counter electrode and manufacture method thereof
  • Dye sensitized solar battery counter electrode and manufacture method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Titanium nitride / superconducting carbon black counter electrode supported by metal titanium sheet, its preparation process is as follows:

[0029] 1) Cut a metal titanium sheet with a thickness of 0.5 mm into 1 cm × 2 cm, soak it in absolute ethanol, wash it ultrasonically for 30 minutes (ultrasonic frequency 40 kHz, power 200 watts), and then dry it for later use.

[0030] 2) Mix 1.0 grams of titanium dioxide powder (Degussa P25, particle size 20-30 nanometers) and 1.0 grams of superconducting carbon black (Shanghai Fuhua superconducting carbon black LB, particle size 12 nanometers, specific resistance 0.2 ohm m) Mix evenly, add 10 ml of absolute ethanol, and grind in a mortar for 2 hours to prepare a titanium dioxide / superconducting carbon black mixed slurry.

[0031] 3) Fix the cleaned titanium sheet on a horizontal table, drip the slurry with a dropper, then evenly scrape it with a glass sheet, dry it in an oven at 80°C for 12 hours, and obtain a thickness of about ...

Embodiment 2

[0041]Change (2) step in embodiment 1 into the saturated ethanol-water (volume ratio 1: 1) solution of superconducting carbon black impregnation ammonium molybdate, other is the same as embodiment 1, makes the nitriding of metallic titanium plate support. Molybdenum / superconducting carbon black counter electrode, measured its photocurrent-voltage curve as figure 2 shown. The short-circuit current is 14.1 mA / cm2, the open-circuit voltage is 0.764 volts, the fill factor is 0.67, and the photoelectric conversion efficiency is 7.16%.

Embodiment 3

[0043] The calcining atmosphere in embodiment 2 is changed into argon by ammonia gas, other is the same as embodiment 2, makes the molybdenum carbide / superconducting carbon black counter electrode that metal titanium sheet supports, records its photocurrent-voltage curve as image 3 shown. The short-circuit current is 13.62 mA / cm2, the open-circuit voltage is 0.737 volts, the fill factor is 0.63, and the photoelectric conversion efficiency is 6.29%.

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Abstract

The invention relates to a dye sensitized solar battery counter electrode and a manufacture method thereof. The manufacture method comprises the following steps of: mixing a carbon material with a transition metal element elementary substance or transition metal element compound in a mass ratio of 10:1-1:10, and fully grinding to obtain mixed slurry; or preparing a transition metal element compound solution and dipping on the carbon material to obtain the slurry; coating the slurry evenly on a conductive substrate in the way of blade coating, or screen printing and spin coating and drying for1-24 hours at 80-120 DEG C; and nitrogenizing or carbonizing the dried conductive substrate coated with the slurry to obtain a nitride / carbon or carbide / carbon counter electrode, wherein used active material integrates high electro-catalysis performance of metal nitride or carbide and excellent electronic and ionic conductivity of the carbon material, the dye sensitized solar battery counter electrode has photoelectric properties better than that of a pure carbon material counter electrode and good performance higher than that of a traditional platinum electrode. The dye sensitized solar battery counter electrode is easy and convenient to prepare and has low cost and high stability.

Description

technical field [0001] The invention relates to a low-cost dye-sensitized solar cell counter electrode and a preparation method thereof. Background technique [0002] Compared with traditional silicon-based solar cells, dye-sensitized solar cells have the advantages of low cost, simple process, and stable performance. They will be solar cells with great practical application value in the future. A typical dye-sensitized solar cell consists of a dye-sensitized semiconductor electrode (working electrode), an I - / I 3 - The electrolyte and the platinum electrode (counter electrode) are composed of two main functions of the counter electrode: 1) returning electrons from the external circuit; 2) electrocatalytic reduction of I in the electrolyte 3 - to I - , completing the electron cycle. Platinum has very good electrical conductivity and electrocatalytic activity, and is a good counter electrode material. However, as a rare and precious metal, the use of platinum undoubte...

Claims

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Application Information

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IPC IPC(8): H01G9/042H01G9/20H01M14/00H01L51/44H01L51/48
CPCY02E10/50Y02E10/542Y02E10/549
Inventor 高学平李国然潘桂玲王凤叶世海
Owner NANKAI UNIV