Spiro-OMeTAD doped with iodine pentoxide to enhance planar perovskite solar cell performance
Spiro-OMeTAD doped with iodine pentoxide to enhance planar perovskite solar cell performance
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DOI：
10.1016/j.jallcom.2023.172749
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发表时间：
2024-01
影响因子：
6.2
通讯作者：
Jing Xu;Jihuai Wu;Qi Chen;Ying Wang;Ruoshui Li;Xia Chen;Z. Lan;Weihai Sun
中科院分区：
文献类型：
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作者：
Jing Xu;Jihuai Wu;Qi Chen;Ying Wang;Ruoshui Li;Xia Chen;Z. Lan;Weihai Sun
由于其巨大的发展潜力，钙钛矿太阳能电池（PSC）的研究在全球范围内进展迅速。在众多空穴传输材料（HTM）中，有机分子spiro-OMeTAD脱颖而出。 Spiro在PSC中的应用受到其弱空穴迁移率和低电导率的限制。在这里，使用一种廉价、生态友好的无机氧化剂五氧化二碘 (I2O5) 来帮助 Spiro 快速且易于控制的氧化。 I2O5 修饰的 Spiro 作为 HTM 改善了载流子传输。同时，陷阱态密度和陷阱辅助复合降低。此外，修改还调整了 HTM 的能级，以正确匹配钙钛矿层。结果，经过 I2O5 修改的 PSC 实现了 22.80% 的冠军功率转换效率，而原始器件的效率为 20.65%。
Due to its enormous development potential, research on perovskite solar cells (PSCs) is progressing rapidly worldwide. Among numerous hole transport materials (HTMs), an organic molecule spiro-OMeTAD emerged victorious. Spiro's application in PSCs is constrained to its weak hole mobility and low conductivity. Here, an inexpensive, ecologically friendly inorganic oxidant iodine pentoxide (I2O5) is used to aid in quick and manageable oxidation of Spiro. I2O5-modified Spiro as HTM improves the charge carrier transportation. Meanwhile, trap-states density and trap-assisted recombination are decreased. Additionally, the modification adjusts the HTM's energy level to match the perovskite layer properly. As a result, the I2O5-modified PSC achieves a champion power conversion efficiency of 22.80%, while the pristine device gets an efficiency of 20.65%.