Regulation of Low-dose Stannous Iso-octanoate for Two-step Prepared Sn-Pb Alloyed Perovskite Solar Cells
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Abstract
低剂量异辛酸亚锡调控两步法制备 Sn-Pb 混合钙钛矿太阳能电 池3 (1.福州大学 先进制造学院，晋江 362200; 2. 福建江夏学院 钙钛矿绿色应用福建省高校重点实验室, 福州 350108; 3. 福建省计 量科学研究院 国家光伏产业计量测试中心, 福州 350003) 摘 要:锡铅(Sn-Pb)混合钙钛矿在制备过程中常使用大量的氟化亚锡(SnF2)添加剂来抑制 Sn 2+ 离子的氧化，然而 SnF2 过量会影响薄膜质量、器件的光电转化效率(PCE)和稳定性。因此，开发低剂量的新型抗氧化剂对于实现高性能 Sn-Pb 混合钙钛矿电池至关重要。本研究采用两步法制备 Sn-Pb 混合钙钛矿薄膜，在第一步中引入较低剂量的异辛 酸亚锡(SnOct2)替代 SnF2 抑制 Sn 2+ 的氧化，研究表明该添加剂可提高薄膜的结晶质量，使得薄膜平均晶粒尺寸达到 850 nm，并且晶界数量减少。添加 SnOct2 的薄膜在手套箱存放 7 d 后仍含有 93.5%的 Sn 2+ ，且由于 SnOct2 具有优 异的抗氧化性，使得添加 SnOct2 后器件的缺陷态密度更低，从 7.20×10 15 cm -3 降低到 4.74×10 15 cm -3 ，抑制了非辐 射复合。除此之外，SnOct2 还改善了钙钛矿薄膜的表面能级。最终，添加 0.030 mmol SnOct2 的 Sn-Pb 混合钙钛矿 电池的 PCE 达到 17.25%，较添加 0.10 mmol SnF2 的器件(11.63%)有显著提高；且在氮气中保存50
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OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Chalcogenide Semiconductor Thin Films
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References (45)
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