Recently, the team of Professor Tao Chen and Professor Changfei Zhu of the University of Science and Technology of China, in cooperation with Professor Xiaojing Hao of the University of New South Wales and others, developed a hydrothermal deposition method to prepare selenium antimony sulfide (Sb2(S,Se)3) semiconductor thin film materials. Applied to solar cells, it achieved a breakthrough of 10% in photoelectric conversion efficiency. The result was published in Nature Energy under the title "Hydrothermal deposition of antimony selenosulfide thin films enables solar cells with 10% efficiency".
Selenium antimony sulfide, whose chemical formula is Sb2(S,Se)3, is an emerging photovoltaic material used in the photovoltaic field in recent years. Its band gap is adjustable in the range of 1.1-1.7 eV to meet the best solar spectrum matching. At the same time, Sb2(S,Se)3 has a high absorption coefficient, and a film with a thickness of about 500 nanometers can achieve the best absorption; therefore, it also has potential applications in ultra-light and portable power generation devices.
Given that Sb2(S,Se)3 has good stability and abundant element reserves, the further improvement of photoelectric conversion efficiency is expected to promote applications. The hydrothermal deposition method developed in this paper can generate a dense, flat and uniformly distributed light-absorbing film in the supercritical state by hydrothermal deposition, which is conducive to carrier transmission, combined with light absorption, adjustment of the ratio of anion and cation, and The control of point defects finally achieved a breakthrough in photoelectric conversion efficiency. From the perspective of material preparation, the hydrothermal deposition method developed in this paper is a simple and low-cost thin film preparation method.
Nature Energy reviewers gave this work a high degree of evaluation and considered it to be a milestone efficiency ("This paper presents a landmark efficiency value for Sb2(S,Se)3 solar cells breaking the 10% barrier"), which is selenium antimony sulfide The development of solar cells brings new light ("This achievement sheds new light on the investigation and application of Sb2(S,Se)3...").
The co-first authors of the paper are post-doctoral Tang Rongfeng, PhD students Wang Xiaomin and Lian Weitao from the School of Chemistry and Materials Science of the Chinese University of Science and Technology. Professor Zhu Changfei from our school, Professor Xiaojing Hao from the University of New South Wales, and Professor Chen Tao from our school are the co-corresponding authors of the paper. The collaborators also include Professor Yang Shangfeng from our school, Professor Xing Guichuan from the University of Macau, and Professor Chen Shiyou from East China Normal University.
This research was supported by the Ministry of Science and Technology, the National Natural Science Foundation of China, and the Hefei National Research Center for Microscale Physical Science.
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