Core Insights - The research team from the Qingdao Institute of Bioenergy and Process Research, Chinese Academy of Sciences, has achieved over 15% photoelectric conversion efficiency in a new type of solar cell material, certified by an international authority [3][4] - The core material, Copper Zinc Tin Sulfide Selenide (CZTSSe), is abundant, low-cost, and environmentally friendly, making it a promising candidate for next-generation solar technology [3][4] Material Characteristics - CZTSSe is derived from widely available elements, does not rely on rare metals, and has low material costs due to its solution-based preparation method [3] - The thin-film nature of the battery reduces material usage, and it is safe and non-toxic, suitable for large-scale applications [3] Technical Challenges and Solutions - A significant challenge has been the migration of metal ions during high-temperature preparation, which affects the stability and performance of the solar cells [3] - The introduction of a "interface phase" structure, Li2SnS3, acts as a guide for metal ions, improving the uniformity and stability of the crystal structure [4] Performance Improvements - The new method has led to a photoelectric conversion efficiency of 15.45% and an internationally certified efficiency of 15.04% [4] - The open-circuit voltage has surpassed 600mV for the first time under narrow bandgap conditions, addressing performance bottlenecks in this type of photovoltaic device [4] Future Implications - The research provides a systematic explanation of the relationship between ion migration, defects, and performance, laying a solid foundation for future industrial applications [4] - With the acceleration of global energy transition, this achievement is expected to play a significant role in future clean energy systems, contributing to green and low-carbon development [4]

格隆汇2月26日｜据央视，近日，中国科学院青岛生物能源与过程研究所研究团队在一种新型太阳能电 池材料上，实现了超过15%的光电转换效率，并获得了国际权威机构认证。相关研究成果在国际能源与 材料领域学术期刊《自然·能源》发表。据了解，这项技术的核心材料叫：铜锌锡硫硒太阳能电池（简 称CZTSSe）。其材料来源广泛，主要元素在地壳中储量丰富，不依赖稀有金属，材料成本低；其次溶 液法制备，制备成本低；薄膜电池，材料用量低；另外，该材料还安全环保，不含有毒元素，适合大规 模应用，在复杂环境中依然能保持性能。 ...