晶体硅太阳电池的BaFx电子选择性接触研究

狄翀; 李文昊; 陈静伟; 丁阳; 韦德远; 许颖

doi:10.19912/j.0254-0096.tynxb.2024-0284

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太阳能学报 ›› 2025, Vol. 46 ›› Issue (6) : 245-250. DOI: 10.19912/j.0254-0096.tynxb.2024-0284

晶体硅太阳电池的BaF_x电子选择性接触研究

狄翀¹, 李文昊¹, 陈静伟¹, 丁阳^1,2, 韦德远³, 许颖¹

作者信息 +

RESEARCH ON BaF_x ELECTRON-SELETIVE CONTACT IN CRYSTALLINE SILLICON SOLAR CELLS

Di Chong¹, Li Wenhao¹, Chen Jingwei¹, Ding Yang^1,2, Wei Deyuan³, Xu Ying¹

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文章历史 +

摘要

研究一种利用电子束蒸发方法制备的超薄氟化钡（BaF_x）薄膜的材料特性,并将其应用为晶体硅异质结电池的新颖的、输运电子而阻挡空穴的免掺杂选择性接触传输材料。紫外光电子能谱测试表明BaF_x/Al界面的功函数为2.55 eV,低于铝本身的功函数（4.26 eV）,可实现对电子的选择性传输功能。加入BaF_x导致Al电极和晶体硅之间形成欧姆接触,并实现23.98 mΩ·cm²的低接触电阻率。将此异质结构作为轻掺杂n型单晶硅太阳电池的免掺杂整背面欧姆接触,使电池的填充因子和短路电流密度都有所提升,并最终实现电池的绝对能量转换效率2.53%的提升。

Abstract

The material properties of an ultrathin barium fluoride （BaF_x） thin film prepared by electron beam evaporation method are investigated and applied as a novel, undoped selective contact transport material for crystalline silicon heterojunction batteries that transport electrons while blocking holes. Ultraviolet photoelectron spectroscopy （UPS） tests show that the BaF_x/Al interface has a work function of 2.55 eV, which is lower than that of aluminum itself （4.26 eV）, enabling a selective transport function for electrons. The addition of BaF_x leads to the formation of an ohmic contact between the aluminum electrodes and the crystalline silicon, and achieving a low contact resistivity of 23.98 mΩ·cm². The use of this heterostructure as a doping-free whole backside ohmic contact for lightly doped n-type monocrystalline silicon solar cells leads to an increase in both the cell's fill factor and short-circuit current density, and ultimately achieves an increase in the cell's absolute energy conversion efficiency of 2.53%.

导出引用

狄翀, 李文昊, 陈静伟, 丁阳, 韦德远, 许颖. 晶体硅太阳电池的BaF_x电子选择性接触研究[J]. 太阳能学报. 2025, 46(6): 245-250 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0284

Di Chong, Li Wenhao, Chen Jingwei, Ding Yang, Wei Deyuan, Xu Ying. RESEARCH ON BaF_x ELECTRON-SELETIVE CONTACT IN CRYSTALLINE SILLICON SOLAR CELLS[J]. Acta Energiae Solaris Sinica. 2025, 46(6): 245-250 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0284

中图分类号： TM615

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