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Counter electrode of a dye-sensitized solar cell and its preparation

A solar cell and dye-sensitized technology, which is applied in the field of dye-sensitized solar cells, achieves the effects of simple and cheap raw materials, high photocurrent, and broad application prospects

Active Publication Date: 2017-02-22
ZHANGJIAGANG IND TECH RES INST CO LTD DALIAN INST OF CHEM PHYSICS CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

(Fuel, 2008, 87, 1195-1206; Faraday Discuss., 2008, 140, 219–231; Chem. Sci. 2012, 3, 2515-2525; Energy Environ. Sci. 2012.5, 8912-8916) but using simple room temperature chemistry Synthetic methods to prepare this kind of polymetallic sulfide catalysts and apply them in solar cells have not been reported yet

Method used

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  • Counter electrode of a dye-sensitized solar cell and its preparation
  • Counter electrode of a dye-sensitized solar cell and its preparation
  • Counter electrode of a dye-sensitized solar cell and its preparation

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Add ammonium tetrathiomolybdate into the formamide solution, stir vigorously to dissolve it, and prepare an ammonium tetrathiomolybdate solution with a concentration of 0.5 mM. Add cobalt nitrate into the formamide solution, stir vigorously to dissolve it, and prepare a cobalt nitrate solution with a concentration of 0.5 mM. Then, the cobalt nitrate-formamide solution was added into the ammonium tetrathiomolybdate-formamide solution at a volume ratio of 1:1, and black flocs were slowly precipitated out. After standing still for 7 days, a porous black colloidal substance was obtained. The supernatant was poured off, the obtained solid matter was repeatedly washed with ethanol and then dried to obtain the desired catalyst. The catalyst was dispersed ultrasonically in isopropanol. Use flake fluorine-doped tin dioxide (FTO) (NSG Corporation, Japan, sheet resistance 14Ω) as the conductive substrate. Keep the substrate temperature at 120°C, use high-purity nitrogen as the c...

Embodiment 2

[0032] The catalytic performance of the CoMoS counter electrode used in Example 1 of the present invention was measured by cyclic voltammetry (Shanghai Chenhua CHI660 electrochemical workstation) and compared with the commercial platinum black counter electrode (purchased from Dalian Qiseguang). The test uses the traditional three-electrode mode (the solar cell counter electrode of the present invention or the solar cell Pt / FTO counter electrode (seven-color light) is used as the working electrode, Ag / AgCl is used as the reference electrode, and the platinum sheet is used as the counter electrode), and the electrolyte is 0.1M LiClO 4 ,10mM LiI,1mM I 2 Acetonitrile solution, the sweep speed is 50mV s -1 . Take the fifth cycle for comparison. The prepared counter electrode cyclic voltammetry scanning initial potential is lower than the platinum black counter electrode, and the peak potential difference is smaller than the platinum black counter electrode. The lower initial pot...

Embodiment 3

[0034] The novel counter electrode of Example 1 of the present invention was assembled into a dye-sensitized solar cell and its photoelectric conversion efficiency was tested. The obtained solar cell device parameters are shown in Table 1. The open circuit voltage is 0.64V, and the short circuit current density is 11.28mA / cm 2 , The fill factor is 69%, and the conversion efficiency of the obtained solar cell is 4.96%.

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Abstract

The invention relates to the field of solar cells, in particular to a counter electrode of a dye-sensitized solar cell and a preparation method of the counter electrode of the dye-sensitized solar cell. According to the counter electrode, a layer of non-platinum catalysts of multi-metal sulfur compounds is prepared on a conducting substrate through a spraying method, the grain size of the catalysts of the multi-metal sulfur compounds ranges from 1 nanometer to 100 micrometers, and the multi-metal sulfur compounds are at least composed of VI B metal and VIII B metal. The sulfur compounds are simple in synthetic method, low in synthetic temperature and high in stability, and the adhesiveness between the sulfur compounds and the FTO substrate is high. The technology is simple, the prepared non-platinum catalysts are not only high in catalytic activity, but also low in price, the cost of the counter electrode is greatly lowered, and the spraying technology is suitable for being widely applied to cells.

Description

technical field [0001] The invention relates to the field of dye-sensitized solar cells, and relates to a novel catalytic counter electrode for dye-sensitized solar cells and a preparation method thereof. Background technique [0002] The sun provides suitable living temperature and abundant food for humans and other animals, which is the basis for the survival of life on earth. The energy used in people's daily life, such as fossil energy, biomass, wind energy, hydroelectric power, etc., can also be traced back to solar energy. [0003] Solar cells can directly convert solar energy into electrical energy for people to use. It is a quiet, clean, pollution-free, flexible and flexible way to utilize solar energy. Since the first battery was born in Bell Laboratories in the 1950s, after more than half a century of development, solar cells have made remarkable achievements. Today, solar cells are roughly divided into three generations according to the development process. The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/20H01G9/042
CPCY02E10/542
Inventor 李灿张文华郑霄家
Owner ZHANGJIAGANG IND TECH RES INST CO LTD DALIAN INST OF CHEM PHYSICS CHINESE ACADEMY OF SCI
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