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在SnF介导的混合Sn-Pb矿中对兴奋剂和缺陷密度的定量分析₂

Jasmeen Nespoli¹, Maartje J van der Meer¹, Sander Heester²

¹Department of Chemical Engineering, Faculty of Applied Sciences, Delft University of Technology, Delft 2629 HZ, The Netherlands.

Chemistry of materials : a publication of the American Chemical Society

|October 20, 2025

概括

将 (II) 化物 (SnF₂) 添加到-混合矿中,可显著降低的氧化,改善光电子特性. 这种增强对于开发高效的太阳能电池至关重要,因为它可以最大限度地减少缺陷并增加载体寿命.

科学领域:

材料科学材料科学材料科学
太阳能光伏发电是如何实现的
固态化学固态化学

背景情况:

-混合矿是高效太阳能电池的有希望的低带隙吸收器.
这些材料中的锡氧化会导致有害的兴奋剂和缺陷,限制性能.
控制锡氧化对于优化矿太阳能电池效率至关重要.

研究的目的:

量化分析锡氧化对Cs_0.25FA_0.75Sn_0.5Pb_0.5I₃矿的光电子性能的影响.
调查锡化物 (SnF₂) 添加剂在缓解锡氧化中的作用.
为了将SnF₂度与导电性,载体度和载体寿命的变化相关联.

主要方法:

光学光谱测定Sn⁴⁺在旋转涂层溶液中的部分.
稳定状态微波导电量测量,以评估螺旋涂层薄膜的暗导电性.
对载体度 (p₀) 和载体寿命进行定量分析.

主要成果:

添加SnF2显著降低了暗电导率,从~100到<1 S m-1 .
SnF₂可以将移动孔度 (p₀) 从~12%降低到<1 × 10¹⁶ cm^-3.
增加的SnF₂会导致更长的载体寿命,接近200 ns,但也会诱导组成的异质性.

结论:

SnF₂有效地清除Sn⁴⁺,减少矿膜中的兴奋剂和缺陷.
减少兴奋剂和缺陷可以提高载体寿命,使SnF处理的矿适合用于太阳能电池.
优化SnF₂加值至关重要,以平衡性能效益与潜在的组成问题.

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