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yexuqing木虫之王 (文学泰斗)
太阳系系主任
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[交流]
Silicon heterojunction back-contact solar cells by laser patterning
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Silicon heterojunction back-contact solar cells by laser patterning 激光图案化硅异质结背接触太阳能电池 ▲ 作者：Hua Wu, Feng Ye, Miao Yang, Fei Luo, Xiyan Tang, Qing Tang, Haoran Qiu, Zhipeng Huang, Genshun Wang, Zhaoqing Sun, Hao Lin, Junzhe Wei, Yunpeng Li, Xiaoqiang Tian, Jinsheng Zhang, Lei Xie, Xiaoyu Deng, Tuan Yuan, Mingzhe Yu, Yong Liu, Ping Li, Hao Chen, Shenghou Zhou, Qishu Xu, Xixiang Xu Show ▲链接： https://www.nature.com/articles/s41586-024-08110-8 ▲摘要： 背接触式硅太阳能电池因其美观而受到重视，因为它们在向阳的一面没有电网，可以应用于建筑物，车辆和飞机，并且可以在不影响外观的情况下实现自我发电。图案化技术将触点安排在硅片的阴影面，这也为光线入射提供了好处。然而，图案过程使生产复杂化并导致功率损耗。 研究者采用激光简化了后接触太阳能电池的制造，提高了功率转换效率。利用这种方法，他们生产出了效率超过27%的硅太阳能电池。在硅片上沉积氢化非晶硅层进行表面钝化，并收集光生载流子。开发了一种不同于传统工艺实践的致密钝化触点。使用不同波长的脉冲皮秒激光来创建背接触图案。 该方法是一种生产高性能背接触硅太阳能电池的流线型工艺，总有效加工时间约为新兴主流技术的三分之一。为了满足太瓦的需求，他们开发了效率为26.5%的无铟电池和26.2%效率的无银电池。随着这些技术的进步，将太阳能解决方案整合到建筑和交通中将会得到扩展。 ▲ Abstract： Back-contact silicon solar cells, valued for their aesthetic appeal because they have no grid lines on the sunny side, find applications in buildings, vehicles and aircraft and enable self-power generation without compromising appearance. Patterning techniques arrange contacts on the shaded side of the silicon wafer, which offers benefits for light incidence as well. However, the patterning process complicates production and results in power loss. We employed lasers to streamline the fabrication of back-contact solar cells and enhance the power-conversion efficiency. Using this approach, we produced a silicon solar cell that exceeded 27% efficiency. Hydrogenated amorphous silicon layers were deposited onto the wafer for surface passivation and to collect light-generated carriers. A dense passivating contact, which differs from conventional technology practice, was developed. Pulsed picosecond lasers operating at different wavelengths were used to create the back-contact patterns. The approach developed is a streamlined process for producing high-performance back-contact silicon solar cells, with a total effective processing time of about one-third that of the emerging mainstream technology. To meet the terawatt demand, we developed indium-less cells at 26.5% efficiency and precious silver-free cells at 26.2% efficiency. Thus, the integration of solar solutions into buildings and transportation is poised to expand with these technological advances. |
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