Transition metal chalcogenide lateral homojunction solar cell and preparation method thereof

Abstract

The invention discloses a transition metal chalcogenide compound horizontal homogeneous junction solar cell and a preparation method thereof, and belongs to the field of semiconductor materials. The solar cell comprises an insulating substrate, an electrode A, an electrode B, an n-type transition metal chalcogenide compound film and a p-type transition metal chalcogenide compound film; the electrode A and the electrode B are located at the two ends of the insulating substrate respectively; and the n-type transition metal chalcogenide compound film and the p-type transition metal chalcogenide compound film are composed of the same compound, and are transversely connected to form a p-n junction. The method adopts a laser synthesis method to prepare the n-type transition metal chalcogenide compound film, and by virtue of the horizontal homogeneous p-n junction, the lattice mismatch rate of p-n junction is effectively lowered, and the interface defects are reduced; the electrodes are matched with a thin film work function to form high ohmic contact; and the electrodes and the thin films are combined by van der waals force, so that damage of an electrode preparation process to the thinfilms can be effectively avoided, the caused problems of stress, metal diffusion and the like are solved, and the conversion efficiency of the solar cell applying the thin films is improved.

Description

technical field [0001] The invention belongs to the field of semiconductor materials, and more specifically relates to a transition metal chalcogenide lateral homojunction solar cell and a preparation method thereof. Background technique [0002] With the increasing demand for energy and the strengthening of environmental protection around the world, the promotion and application of clean energy has become an inevitable trend. Clean and renewable energy is divided into ocean energy, solar energy, wind energy, hydrogen energy, biomass energy, geothermal energy, etc. Among them, solar energy converts the sun's light energy into other forms of heat energy, electrical energy, and chemical energy. During the energy conversion process, no other harmful gases or solid wastes are produced. It is an environmentally friendly, safe, and pollution-free new energy source. [0003] Vertically stacked van der Waals layered 2D materials have attracted extensive attention due to their excel...

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Problems solved by technology

[0004] The invention solves the problems of high lattice mismatch rate and large interface defects in the process of forming the p-n junction of the transition metal chalcogenide film semiconductor material in the prior art, and the damage, stress and metal damage caused by the electrode to the film during the preparation process. Diffusion, and the technical problem of mismatching the work function of the electrode and the film to form a good ohmic contact

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