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Preparation method of photoreduced aminated graphene as counter electrode for dye-sensitized solar cells

A technology of aminated graphene and solar cells, which can be used in photosensitive equipment, photovoltaic power generation, etc., and can solve the problems of poor wettability and chemical reactivity

Inactive Publication Date: 2018-01-09
DALIAN UNIV OF TECH
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Problems solved by technology

However, only thermally stable nitrogen-doped products such as graphite nitrogen, pyridine nitrogen, and pyrrole nitrogen can be obtained through high-temperature heat treatment. Although these nitrogen-doped products also have certain catalytic activity, their wettability and chemical reactivity are poor.

Method used

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  • Preparation method of photoreduced aminated graphene as counter electrode for dye-sensitized solar cells
  • Preparation method of photoreduced aminated graphene as counter electrode for dye-sensitized solar cells
  • Preparation method of photoreduced aminated graphene as counter electrode for dye-sensitized solar cells

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Embodiment 1

[0027] see figure 1 , photoreduced aminated graphene is used as a dye-sensitized solar cell counter electrode, and its preparation method is as follows:

[0028] 1) Graphene oxide GO was prepared by the modified Hummers method. The prepared graphene oxide GO aqueous solution (3mg / mL) was ozonated for 0min, 5min, 10min, 20min, centrifuged, the supernatant was discarded, and the precipitate was vacuum-dried at 60°C;

[0029] 2) Take 30 mg of ozone-oxidized graphene oxide flakes and put them in a 10 mL open glass bottle, add 10 mL of benzyl alcohol and 0.5 mL of concentrated ammonia water to it, and ultrasonically disperse for 1.5 h to obtain a black-brown sol. Put it into the polytetrafluoroethylene lining, and add 10ml of concentrated ammonia water to the lining, transfer the lining to an autoclave, react at 180°C for 10h, filter with suction after cooling, and dry the precipitate in a blast drying oven at 60°C 12h, see Table 1, obtain different nitrogen contents of aminated ...

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Abstract

The invention discloses a method for preparing photoreduced aminated graphene as a counter electrode of a dye-sensitized solar cell. The aqueous solution of graphene oxide is ozone-oxidized and vacuum-dried; add solvent and concentrated ammonia water to the glass bottle containing the ozone-oxidized graphene oxide sheet, ultrasonically disperse for 0.5-2 hours, and transfer the open glass bottle into the poly In the tetrafluoroethylene lining, react in an autoclave for 10 to 18 hours, separate and dry to obtain aminoated graphene; dissolve it with isopropanol, scrape it on the conductive glass, and light it. The preparation method has simple process, mild conditions, low energy consumption, no high-temperature carbonization process, high nitrogen content, good conductivity, and high photoelectric conversion efficiency of assembled dye-sensitized solar cells, which is basically the same as that of Pt electrodes. The efficiency is comparable, and it is a potential substitute material for the counter electrode of dye-sensitized solar cells.

Description

technical field [0001] The invention relates to a method for preparing photoreduced aminated graphene as a counter electrode of a dye-sensitized solar cell. Background technique [0002] In the 21st century, energy issues are a major problem hindering the progress of human civilization. Solar energy is inexhaustible, and clean, environmentally friendly, and renewable have become research hotspots. How to make full and reasonable use of solar energy has become an effective way to solve the problem of energy shortage. Dye-sensitized solar cells (DSSCs) have wide spectral response range, simple process, low cost, environmental friendliness and broad application prospects. The counter electrode material of DSSC has a significant impact on the performance of the entire battery. Currently, the traditionally used counter electrode based on Pt nanomaterials maintains the record for the highest photoelectric conversion efficiency due to its excellent electrocatalytic activity. Howe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/042H01G9/20
CPCY02E10/542
Inventor 郝策景洪宇史彦涛任素贞
Owner DALIAN UNIV OF TECH
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