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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: 2012-01-18
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
  • 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] The cleaned conductive glass was immersed in an aqueous solution of polydiallyldimethylammonium chloride with a mass fraction of 0.5% for 2 h, rinsed with water after being taken out, blown dry, and then immersed in a graphene water with a mass fraction of 0.05% to suspend After being taken out, rinsed with water and air-dried, then immersed in the above polyelectrolyte for 2 h, rinsed with water and air-dried after taking out, and finally immersed in an aqueous solution of 0.05% chloroplatinic acid for 2 h. Rinse with water and blow dry to form a self-assembled ultrathin film with a structure of polyelectrolyte / graphene / polyelectrolyte / chloroplatinic acid. The above-mentioned ultra-thin films were sintered at 400 °C for 1 h in air to form an ultra-thin film with a structure of graphene / platinum nanoparticles.

[0022] The ultrathin films were assembled as counter electrodes into DSSCs according to conventional methods with a cell area of ​​0.2304 cm 2 . The current-v...

Embodiment 2

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

[0025] The ultrathin films were assembled as counter electrodes into DSSCs according to conventio...

Embodiment 3

[0027] The cleaned conductive glass was immersed in an aqueous solution of polydiallyldimethylammonium chloride with a mass fraction of 5 % for 0.2 h, taken out, rinsed with water, blown dry, and then immersed in an aqueous solution of 1 % mass fraction of chloroplatinic acid After being taken out, rinsed with water and air-dried to form a self-assembled ultrathin film with a structure of polyelectrolyte / chloroplatinic acid. The above ultra-thin films were sintered at 500 °C for 0.2 h in air to form ultra-thin films with a structure of platinum nanoparticles.

[0028] The ultrathin films were assembled as counter electrodes into DSSCs according to conventional methods with a cell area of ​​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, the short-circuit photocurrent ( J sc ) is 10.12 mA / cm 2 , the fill factor ( FF ) is 0.68, the energy conv...

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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 Applications(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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