Preparation method for photo-reduction amino graphene taken as counter electrode of dye-sensitized solar cell
A technology of aminated graphene and solar cells, which can be used in photosensitive equipment, photovoltaic power generation, electrolytic capacitors, etc., and can solve the problems of poor wettability and chemical reactivity
Inactive Publication Date: 2016-06-29
DALIAN UNIV OF TECH
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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.
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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 graphene oxide flakes oxidized by ozone and put them in a 10 mL glass sample 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. Add 10ml of concentrated ammonia water to the lining of tetrafluoroethylene, 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 for 12h. See Table 1 to obtain aminated graphene AGO-0min, AGO-5min, AGO-10min, and AGO-2...
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The invention discloses a preparation method for photo-reduction amino graphene taken as a counter electrode of a dye-sensitized solar cell. A graphene oxide water solution is oxidized by ozone and dried in a vacuum condition; a solvent and strong ammonia water are added to a glass bottle containing ozone-oxidized graphene oxide sheets, and ultrasonic dispersion is carried out for 0.5-2h; the opened glass bottle is moved into a polytetrafluoroethylene liner containing strong ammonia water to be subjected to a reaction in an autoclave for 10-18h, and the product is separated and dried to obtain amino graphene; and the obtained amino graphene is dissolved by isopropanol, the conductive glass is coated with the processed amino graphene in a blade-coating manner, and then the conductive glass is subjected to illumination. The preparation method is simple in process, mild in conditions, low in energy consumption, low in energy consumption, free of a high-temperature carbonization process, relatively high in nitrogen content and high in conductivity; and in addition, the photoelectric conversion efficiency of the assembled dye-sensitized soar cell is relatively high and is basically equivalent to that of a Pt electrode, so that the photo-reduction amino graphene is a highly potential substitute material for the counter electrode of the dye-sensitized solar cell.
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...
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IPC IPC(8): H01G9/042H01G9/20
CPCY02E10/542H01G9/2022H01G9/2045
Inventor 郝策景洪宇史彦涛任素贞
Owner DALIAN UNIV OF TECH