Solar cells are the most familiar and widely used in daily life. They can effectively use solar energy and convert it into electrical energy.

　　Photovoltaic materials, as the core of solar cell power generation, play a pivotal role in this system. Selenium antimony sulfide, whose chemical formula is Sb2(S, Se)3, is a rookie player in the solar cell industry.

　　Figure 1: Sb2(S,Se)3 crystal structure diagram

　　It has the advantages of simple composition, stable structure, abundant reserves, etc., and the band gap is adjustable in the range of 1.1-1.7 eV.

　　According to Shockley-Queisser theory, the theoretical photoelectric conversion efficiency of Sb2(S, Se)3 can reach 32%, which is considered as a light collection material with great development potential. At the same time, Sb2(S,Se)3 has a high absorption coefficient, and a film with a thickness of several hundred nanometers can absorb enough sunlight. This feature is comparable to the current rapidly developing perovskite materials. It is in ultra-light and portable power generation. Potential applications in devices.

　　However, the main problem restricting the application of Sb2(S, Se)3 is the actual photoelectric conversion efficiency. Therefore, the preparation of a light absorbing layer with suitable band gap width, high crystallinity, and favorable charge transfer and controlling the diffusion of interface elements are the key to the promotion of this material.

　　Recently, a research and development team has developed a hydrothermal deposition method to prepare selenium antimony sulfide (Sb2(S, Se)3) semiconductor thin film materials and apply them to solar cells, achieving a breakthrough in photoelectric conversion efficiency of 10%. The result was published in Nature Energy under the title Hydrothermaldeposition of antimony selenosulfide thin films enables solar cells with 10% efficiency.

　　Lithium-ion battery (LIB) has become the main energy storage solution in modern social life. Among them, lithium iron phosphate batteries are a perfect replacement for lead-acid batteries, and they are the first choice for grid-connected peak shaving, off-grid energy storage, photovoltaic energy storage, UPS, data center and other industries.

　　A new type of solar cell plus a lithium iron phosphate battery, one to generate electricity and the other to store electricity, is a perfect partner.