Bulk effect solar cell material and preparation method thereof

Abstract

The invention provides a bulk effect solar cell material which comprise a metal electrode, BiFeO3 ferroelectrics and a LaNiO3 / Si substrate, wherein the BiFeO3 ferroelectrics grows vertical to the direction of the LaNiO3 / Si substrate. The invention also provides a preparation method of the bulk effect solar cell material. The method comprises the following steps of: with BiFeO3 as structural material, preparing pure phase BiFeO3 film by using a sol-gel method, spin-coating the obtained BiFeO3 film on the LaNiO3 / Si substrate and carrying out stepped annealing at a high temperature, and finally sputtering electrodes to the BiFeO3 film. The BiFeO3 film disclosed by the invention has uniform and dense surface, good crystalline properties and no impurity phase, and can test photovoltaic effect by using a metal electrode-ferroelectric-buffer layer substrate sandwich structure. The test structure is simple and clear and larger open-circuit voltage can be obtained.

Description

technical field [0001] The invention relates to the technical field of optoelectronic materials, semiconductor materials and devices, in particular to a bulk effect solar cell material and a preparation method thereof. Background technique [0002] With the over-exploitation of non-renewable energy, the energy crisis spreads all over the world, and the development and utilization of new energy is imminent. As the leading renewable energy, solar energy has a very optimistic development prospect. Solar cells are components that directly use solar energy to generate electricity. At present, solar cells that are widely used are mainly made of silicon series. As we all know, the improvement of their conversion efficiency has almost reached the limit. Therefore, the research and development of new materials is the key to the development of the solar cell industry. It has practical significance for better and more efficient use of solar energy. [0003] Due to its unique self-pola...

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Problems solved by technology

[0004] The invention overcomes the technical defects of bismuth ferrite thin film in the prior art, such as complex process, high cost, high crystallization temperature, uneven particle distribution, no obvious preferred orientation, and many impurity phases, and provides a kind of thin film in LaNiO 3 / Si substrate growth BiFeO 3 The ferroelectric bulk effect solar cell material, the bismuth ferrite film in the bulk effect solar cell material of the present invention has the characteristics of high film-forming quality, high uniaxial orientation, uniform particles, and good light absorption performance.

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