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yexuqing木蟲之王 (文學(xué)泰斗)
太陽系系主任
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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 激光圖案化硅異質(zhì)結(jié)背接觸太陽能電池 ▲ 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 ▲鏈接： https://www.nature.com/articles/s41586-024-08110-8 ▲摘要： 背接觸式硅太陽能電池因其美觀而受到重視，因為它們在向陽的一面沒有電網(wǎng)，可以應(yīng)用于建筑物，車輛和飛機，并且可以在不影響外觀的情況下實現(xiàn)自我發(fā)電。圖案化技術(shù)將觸點安排在硅片的陰影面，這也為光線入射提供了好處。然而，圖案過程使生產(chǎn)復(fù)雜化并導(dǎo)致功率損耗。 研究者采用激光簡化了后接觸太陽能電池的制造，提高了功率轉(zhuǎn)換效率。利用這種方法，他們生產(chǎn)出了效率超過27%的硅太陽能電池。在硅片上沉積氫化非晶硅層進行表面鈍化，并收集光生載流子。開發(fā)了一種不同于傳統(tǒng)工藝實踐的致密鈍化觸點。使用不同波長的脈沖皮秒激光來創(chuàng)建背接觸圖案。 該方法是一種生產(chǎn)高性能背接觸硅太陽能電池的流線型工藝，總有效加工時間約為新興主流技術(shù)的三分之一。為了滿足太瓦的需求，他們開發(fā)了效率為26.5%的無銦電池和26.2%效率的無銀電池。隨著這些技術(shù)的進步，將太陽能解決方案整合到建筑和交通中將會得到擴展。 ▲ 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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