Preparation method of conductive organic matter/silicon nanowire solar cell and product thereof

Abstract

The invention discloses a preparation method of a conductive organic matter / silicon nanowire solar cell. The preparation method includes the steps of: taking aluminum oxide as a template, and combining with a metal-assisted chemical etching method to prepare silicon nanowires, thermally oxidizing for 60-800min at the temperature of 800-1000 DEG C to generate silicon oxide on the surfaces of the silicon nanowires, and steeping into hydrofluoric acid solution until the silicon oxide is completely removed; steeping the processed silicon nanowires into tetramethylammonium hydroxide solution, rotationally coating conductive organic matters on the surfaces after taking out of the solution, and further thermally processing to obtain knotted silicon nanowires; then respectively depositing silver and aluminum on the fronts and backs of the knotted silicon nanowires to serve as electrodes, and thereby obtaining the conductive organic matter / silicon nanowire solar cell. The invention provides a preparation method of the conductive organic matter / silicon nanowire solar cell; according to the preparation method, the silicon nanowires with ordered arrangement and controllable diameter can be prepared, and thereby the conductive organic matter / silicon nanowire solar cell with significantly improved cell efficiency can be prepared.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a method for preparing a conductive organic matter / silicon nanowire solar cell and its products. Background technique [0002] In today's world, non-renewable energy sources such as coal and oil are frequently in emergency, and the energy crisis has restricted economic development. At the same time, the abnormal global climate and deteriorating environmental problems caused by conventional energy sources have also attracted much attention. More and more countries are turning their attention to renewable energy, and the development of solar energy resources has become a global trend. Solar cells have three advantages of permanence, cleanliness and flexibility. In the solar cell industry, solar cells based on crystalline silicon account for more than 80%, but compared with conventional energy sources, the total market share is still very small. This is mainly because cost iss...

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Problems solved by technology

Although silicon nanowires prepared by traditional methods can effectively reduce the reflectivity, due to the large surface area, there is a serious problem of carrier recombination, which reduces the minority carrier lifetime of silicon nanowires, thereby affecting the efficiency of the cell [Zhang, J.; Zhang, Y.; Zhang, F.; Sun, B. Electrical characterization of inorganic-organic hybrid photovoltaic devices based on silicon-poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate).Appl.Phys.Lett.2013,102,013501 .]

At the same time, the silicon nanowires prepared by traditional methods are disordered and disordered, and the diameter of the nanowires cannot be effectively controlled, and the minority carrier lifetime of the silicon nanowires cannot be controlled.

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