钠掺杂改进Cs₂AgBiBr₆双钙钛矿太阳能电池

Sodium-Doped Improved Cs₂AgBiBr₆ Double Perovskite Solar Cells

摘要: 通过控制Na⁺的掺杂浓度，成功制备出微孔密度显著降低的钙钛矿薄膜，这一进步有效抑制了材料中的缺陷状态。我们构建了一种无HTML碳基PSC结构，其中Cs₂AgBiBr₆薄膜作为核心吸光材料。研究发现，适量的Na⁺替代Cs⁺不仅优化了Cs₂AgBiBr₆薄膜的形貌质量，薄膜的光吸收能力也显著增强。数据显示，当Na⁺掺杂比例为5%时，所制备的Cs₂AgBiBr₆碳基PSC展现出了最优性能，其PCE达到了0.85%，相较于未掺杂Na⁺的对照组，效率提升了约39%。

Abstract: By controlling the doping concentration of Na⁺, perovskite films with significantly reduced micropore density were successfully prepared, which effectively suppressed the defect state in the materials. We constructed an HTML free carbon based PSC structure with Cs₂AgBiBr₆ film as the core light absorbing material. It was found that the appropriate amount of Na⁺ instead of CS⁺ not only optimized the morphology and quality of Cs₂AgBiBr₆ film, but also significantly enhanced the optical absorption capacity of the film. The test data showed that when the Na⁺ doping ratio was 5%, the Cs₂AgBiBr₆ carbon based PSC showed the best performance, and its PCE reached 0.85%, which was about 39% higher than that of the control group without Na⁺.