Solar cell based on surface plasma reinforcing principle and preparing method thereof

Abstract

The invention discloses a solar cell based on a surface plasma reinforcing principle and a preparing method of the solar cell. The solar cell comprises a wide band gap semiconductor layer, a photosensitization dye layer, a graphene layer and a metal nanoparticle layer, wherein the wide band gap semiconductor layer, the photosensitization dye layer, the graphene layer and the metal nanoparticle layer are arranged on a back electrode in sequence in a stacked mode. According to the solar cell, a local electromagnetic field around particles is greatly improved through local surface plasmons of the metal nanoparticles, and incident optical field energy is stored around the surfaces of the nanometer particles, so that effective excitation is conducted on optical excitation dye, and the efficiency of light absorption of the solar cell is improved. Meanwhile, single-layer graphene is used for replacing an electrolyte solution and a counter electrode in a traditional cell, the cell structure is simplified, the safety performance of the cell is effectively improved, and the solar cell has huge potential in industrial production and application.

Description

technical field [0001] The invention relates to a solar cell based on the principle of surface plasmon enhancement and a preparation method thereof. Background technique [0002] Among the ranks of new energy sources, solar energy accounts for more than 99% of the total energy of the earth, is clean and has large reserves, and is gradually becoming the main force of the new energy industry (Chem. Rev. 2010, 110, 6595). The solar cell is an important carrier that converts solar energy into electrical energy. It mainly uses the photovoltaic effect of photovoltaic semiconductor materials for photoelectric conversion; the main researched semiconductor materials are: single crystal silicon, polycrystalline silicon, multi-component compounds, organic semiconductors, dyes Sensitization, etc. (Chem. Rev, 2007, 107:1324-1338). [0003] Compared with traditional silicon solar cells, organic dye-sensitized solar cells have become an emerging force due to their low cost, and are also a...

AI Technical Summary

Problems solved by technology

At present, the material of light-transmitting conductive electrodes used in solar cells is metal oxide, commonly known as conductive glass (such as indium tin oxide, fluorine tin oxide), but metal ions in conductive glass are easy to diffuse spontaneously, and have strong absorption for infrared spectrum property, and its thermal stability is poor (Adv.Mater.,2011,23(13):1514–1518); people urgently need a low-cost material that can replace conductive glass to further promote the industrialization process of solar cells ( Nanotechnology, 2012, 23(8): 085201–1–6)

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