A kind of indium tin oxide nanowire array composite material and its preparation method and application in solar cells

Abstract

The invention discloses an indium tin oxide nanowire array composite, a method for preparing the indium tin oxide nanowire array composite and the application of the indium tin oxide nanowire array composite in a solar cell. The indium tin oxide nanowire array composite comprises an indium tin oxide nanowire array which is generated on a conducting substrate, and cuprous sulfide nano-particles are wrapped on the indium tin oxide nanowire array. The method for preparing the indium tin oxide nanowire array composite comprises the steps that (1) the indium tin oxide nanowire array is generated on the conducting substrate through deposition by means of the chemical vapor deposition method with gold nanoparticles as a catalyst; (2) CdS nano-particles are wrapped on the indium tin oxide nanowire array by means of the chemical bath deposition method; (3) the CdS nano-particles are converted into the Cu2S nano-particles by means of the ion exchange method, and then the composite is obtained through calcinations in the inert atmosphere. The performance of the constituted solar cell with a counter electrode material made of the Cu2S@ITO nanowire array prepared with the method is far better than that of a solar cell with a counter electrode material made of precious metal Pt or Au and a transition metal chalcogen compound of a metal matrix.

Description

technical field [0001] The invention relates to an indium tin oxide nanowire array composite material, a preparation method thereof and an application in solar cells. Background technique [0002] With the rapid development of contemporary human society, the increasingly serious energy and environmental problems have accelerated the development and utilization of new energy technologies. Solar energy has attracted widespread attention due to its abundant resource reserves, clean and environmental protection, and as photoelectric conversion devices. Solar cells have become the focus of research. Quantum dot-sensitized solar cells, as a new type of photoelectric conversion device, draw on the structure of dye-sensitized solar cells and replace organic dye molecules with inorganic semiconductor quantum dots as light-absorbing materials, which can not only significantly reduce production costs, but also rely on inorganic The quantum size effect and multi-electron excitation eff...

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Problems solved by technology

The former will slowly react with the polysulfide electrolyte due to the presence of the metal substrate, thereby affecting the stability of the battery; the latter not only needs to prepare catalyst materials and conductive additives separately, but the properties of the conductive material itself and the uniformity of the composite will directly restrict the stability of the battery. The catalytic performance of the counter electrode, and the newly added material may introduce a new interface at the counter electrode, thereby increasing the series resistance of the battery

Therefore, how to improve the catalytic performance of the counter electrode material to obtain efficient quantum dot-sensitized solar cells is still a great challenge.

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