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Method for preparing graphene/platinum nano counter electrode material for dye sensitized solar cell

A technology for solar cells and dye sensitization, applied in the field of dye-sensitized solar cells, can solve problems such as large-scale production and application limitations, and achieve the effects of improving catalytic effect, reducing cost and simple process

Inactive Publication Date: 2013-02-27
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Platinum counter electrodes are usually prepared by magnetron sputtering (Electrochimi. Acta., 2001, 46, 3457) and thermal decomposition of chloroplatinic acid (J. Electrochem. Soc., 1997, 144, 876), although there are relatively Good catalytic performance and comprehensive performance, but because platinum is a noble metal, these methods have obvious limitations for large-scale production and application

Method used

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  • Method for preparing graphene/platinum nano counter electrode material for dye sensitized solar cell
  • Method for preparing graphene/platinum nano counter electrode material for dye sensitized solar cell

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Soak the cleaned conductive glass in 0.5% polydiallyldimethylammonium chloride aqueous solution for 2 h, take it out, rinse it with water, dry it, and then immerse it in 0.05% graphene water suspension After taking it out, rinse it with water and dry it, then immerse it in the above polyelectrolyte for 2 hours, take it out, rinse it with water, blow it dry, and finally immerse it in a 0.05% aqueous solution of chloroplatinic acid for 2 hours. Rinse with water and dry to form a self-assembled ultra-thin film of polyelectrolyte / graphene / polyelectrolyte / chloroplatinic acid. The above ultra-thin film was sintered at 400 °C in air for 1 h to form an ultra-thin film with the structure of graphene / platinum nanoparticles.

[0022] According to the conventional method, the ultra-thin film was used as the counter electrode to assemble DSSCs, and the cell area was 0.2304 cm 2 . The current-voltage (I-V) curve of the dye-sensitized solar cell was measured under AM1.5 simulated su...

Embodiment 2

[0024] Immerse the cleaned conductive glass in a 2% polydiallyldimethylammonium chloride aqueous solution for 0.5 h, take it out, rinse it with water, dry it, and then immerse it in a 0.1% graphene ethanol suspension 0.5 h in the polyelectrolyte, rinsed with ethanol and dried after taking it out, repeated the above self-assembly process once, then immersed in the above polyelectrolyte for 0.5 h, rinsed with water after taking it out, dried, and finally immersed in 1% chlorine Put in platinum acid aqueous solution for 0.5 h, rinse with water after taking it out, and dry it to form a structure of (polyelectrolyte / graphene) 2 / Self-assembled ultrathin films of polyelectrolyte / chloroplatinic acid. The above ultra-thin film was sintered in air at 450 °C for 1 h to form a structure of (graphene) 2 / Ultrathin films of platinum nanoparticles.

[0025] According to the conventional method, the ultra-thin film was used as the counter electrode to assemble DSSCs, and the cell area...

Embodiment 3

[0027] Soak the cleaned conductive glass in 5% polydiallyldimethylammonium chloride aqueous solution for 0.2 h, take it out, rinse it with water, dry it, and then immerse it in 1% chloroplatinic acid aqueous solution After taking it out for 0.2 h, rinse it with water and dry it to form a self-assembled ultra-thin film with the structure of polyelectrolyte / chloroplatinic acid. The above ultra-thin film was sintered at 500 °C in air for 0.2 h to form an ultra-thin film with a structure of platinum nanoparticles.

[0028] According to the conventional method, the ultra-thin film was used as the counter electrode to assemble DSSCs, and the cell area was 0.2304 cm 2 . The current-voltage (I-V) curve of the dye-sensitized solar cell was measured under AM1.5 simulated sunlight, and the open circuit photovoltage ( V oc ) is 672 mV, and the short-circuit photocurrent ( J sc ) is 10.12 mA / cm 2 , fill factor ( FF ) is 0.68, and the energy conversion efficiency ( n ) is 4.62%. ...

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Abstract

The invention belongs to the technical field of dye sensitized solar cells, in particular to a method for preparing a graphene / platinum nano counter electrode material for a dye sensitized solar cell. The method comprises the following steps of: soaking a conducting substrate on which a polyelectrolyte is adsorbed in a graphene suspension, a polyelectrolyte solution and a chloroplatinic acid solution in sequence in an electrostatic self-assembly way to form a self-assembly ultrathin film with a polyelectrolyte / graphene / polyelectrolyte / chloroplatinic acid structure on the surface of the conducting substrate under the action of electrostatic attraction; and sintering and transforming into a 'graphene / platinum nanoparticle' ultrathin film. The film can be taken as a counter electrode material for the dye sensitized solar cell. The preparation method has a simple process, the prepared counter electrode has extremely low platinum load amount, the cost of the counter electrode and the dye sensitized solar cell is greatly lowered, and the method can be applied to large-scale production of assembly line operation.

Description

technical field [0001] The invention belongs to the technical field of dye-sensitized solar cells, and in particular relates to a method for preparing a graphene / platinum nano-counter electrode material for dye-sensitized solar cells. Background technique [0002] Since Professor M. Grötzel introduced the concept of nanoporosity into dye-sensitized wide bandgap TiO in 1991, 2 In semiconductor research, since dye-sensitized solar cells (DSSCs) with an energy conversion efficiency of 7.1% were obtained (Nature, 1991, 353, 737), DSSCs are characterized by their low cost, relatively simple manufacturing process, high The photoelectric conversion efficiency and other characteristics have quickly attracted widespread attention from the international academic and industrial circles. [0003] DSSCs mainly consist of dye-sensitized porous semiconductor nanocrystal films, electrolytes, and counter electrodes. The dye molecules are excited by the light, electrons are injected into th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/042H01G9/20H01M14/00H01L51/44B82Y30/00B82Y40/00
CPCY02E10/542Y02E10/549Y02P70/50
Inventor 王忠胜宫峰
Owner FUDAN UNIV
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