Organic solar cell machining method

Abstract

The invention discloses an organic solar cell machining method. The method comprises the following steps: preparing a layer of module pellet array which can be dissolved by an organic solvent and is 10nm to 1[mu]m in diameter on a bottom electrode layer to obtain a module electrode layer; depositing an alloy film which is not larger than 100nm in thickness on the module electrode layer to obtain an alloy film electrode layer; peeling module pellets with the organic solvent to obtain alloy nanometer particles; and depositing an organic solar function layer and a top electrode layer in sequence on the surface of the alloy nanometer particles. The module pellets are arranged before deposition of the alloy film to fill spaces among adjacent module pellets with an alloy material, and opposite sides of the alloy particles obtained after peeling the module pellets are of arc-shaped triangular structures, so that alloy particles of different sizes can be prepared according to different sizes of the module pellets. Through adoption of the method, metal nanoparticles with wider surface plasmon resonance peaks and larger wavelengths can be prepared; absorption of an organic solar cell can be improved in a wider wavelength range; and the photoelectric conversion efficiency is increased.

Description

technical field [0001] The invention relates to the technical field of organic solar cells, in particular to a processing method for organic solar cells. Background technique [0002] Organic solar cells are a photovoltaic cell power generation technology that uses organic photoelectric materials as light-absorbing layers. advantage. However, most organic optoelectronic materials have short exciton diffusion lengths and low carrier mobility. In order for the excitons in the organic active layer to diffuse to the donor / acceptor interface to dissociate to form free carriers and be effectively collected by the corresponding electrodes, the thickness of the organic layer must be sufficiently thin (usually less than 200 nm). But such a thin organic layer cannot absorb all the incident light energy, limiting the efficiency of the device. [0003] In recent years, nanotechnology has developed rapidly. Metallic nanoparticles have been found to exhibit many superior properties no...

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Problems solved by technology

Although the use of alloy nanoparticles can broaden the surface plasmon resonance peak of metal nanoparticles, it is difficult to reach the near-infrared region due to the limitation of its shape, which limits its application in organic solar cells.

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