Preparation method of composite counter electrode for quantum dot-sensitized solar cell
A solar cell and quantum dot sensitization technology, applied in the field of solar cells, can solve the problems of unstable counter electrode, difficult to obtain sulfide film, strict equipment requirements, etc., achieve low cost, improve photoelectric conversion efficiency and stability, and operate simple effect
Inactive Publication Date: 2015-06-10
HUBEI UNIV OF SCI & TECH
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Problems solved by technology
The counter electrode obtained by the metal sheet corrosion method is unstable, the thermal evaporation method has strict requirements on the equipment, and the in-situ ion layer adsorption and reaction method is difficult to obtain a uniform sulfide film on a smooth glass substrate
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Embodiment 5
[0059] Referring to the experimental group 1, select the parameter conditions of the battery number 8 to prepare Cu x S / MWCNT / FTO composite counter electrode, and then prepare CuInS separately 2 , CdS quantum dot sensitized photoanode, where CuInS 2 For the specific method of quantum dot sensitization of the photoanode, please refer to the literature "J.Y.Chang, L.F.Su, etc., Chem. Commun., 2012, 48, 4848-4850", which will not be repeated here. The specific method of CdS quantum dots sensitized photoanode can refer to the literature "C.H.Chang, Y.L.Lee, Appl. Phys. Lett. 2007, 91, 053503", and will not be repeated here. Keeping other steps and parameters unchanged, with Cu x The S / MWCNT / FTO composite counter electrode was assembled into a quantum dot-sensitized solar cell for photoelectric conversion efficiency testing. The cell number is 26-27, which is used as Example 26-Example 27 of the present invention. The test results are shown in Table 5.
[0060] Table 5 Efficienc...
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Abstract
The invention belongs to the technical field of solar cells and particularly discloses a preparation method of composite counter electrode for a quantum dot-sensitized solar cell. The composite counter electrode comprises multi-walled carbon nano-tubes, a metal sulfide and a conductive substrate. During preparation, a layer of multi-walled carbon nano-tubes deposits on the conductive substrate by means of an electrophoresis method, the metal sulfide synthesized in a liquid phase mode deposits on the multi-walled carbon nano-tubes by means of the electrophoresis method to prepare the composite counter electrode, and a photo-anode and electrolyte form the quantum dot-sensitized solar cell. The preparation method has the advantages that operation is simple, special devices and solvents are not needed, cost is low, the photoelectric converting efficiency and stability of the quantum dot-sensitized solar cell are improved, and the method is suitable for manufacture of various quantum dot-sensitized solar cells.
Description
technical field [0001] The invention belongs to the field of solar cells, and further belongs to the technical field of counter electrodes in solar cells, in particular to a method for preparing a metal sulfide composite counter electrode for quantum dot-sensitized solar cells. Background technique [0002] With the continuous consumption of fossil energy and the increasingly serious environmental problems caused by it, coupled with the continuous growth of human energy demand, the study of solar cells is of great significance and is imperative. [0003] Dye-sensitized solar cells are considered to be a promising new generation of solar cells. Compared with dye-sensitized solar cells, quantum dot-sensitized solar cells have higher theoretical conversion efficiency. Compared with dye sensitizers, quantum dot sensitizers have many advantages, such as higher extinction coefficient, adjustable energy gap, and potential for multi-exciton effects. Therefore, quantum dot-sensitize...
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IPC IPC(8): H01G9/042H01G9/048H01G9/20
Inventor 舒婷
Owner HUBEI UNIV OF SCI & TECH