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| 钙钛矿的瞬态吸收光谱研究 内容摘要：钙钛矿材料因其较高的光吸收系数，较低的制作成本获得广泛关注。目前，单结钙钛矿太阳能电池的光电转换效率从2009年的3.8%增长至25.5%，有望实现产业化并成为下一代薄膜太阳能电池。但是由于我们对其中光电转换的微观物理机制缺乏深层次的认识，太阳能电池的能量转换效率很难达到Shockly-Queisser极限。本文主要介绍了具有超高灵敏度的瞬态吸收光谱仪可以研究在低功率泵浦下的超快载流子动力学，避免与高载流子密度相关的非线性效应和多体相互作用的影响，从而获得钙钛矿薄膜真实环境工作状态下的载流子动力学信息。 关键词：瞬态吸收光谱；钙钛矿 The study on transient absorption spectroscopy of perovskite Abstract: Perovskite materials have attracted a lot of attention because of their high coefficient of light absorption and low production cost. At present, the photoelectric conversion efficiency of single-junction perovskite solar cells has increased from 3.8% in 2009 to 25.5%, which is expected to be industrialized and become the next generation of thin-film solar cells. However, due to the lack of a deep understanding of the microscopic physical mechanism of perovskite solar cells,It is difficult for the energy conversion efficiency of solar cells to reach the Shocklyly-Queisser limit.In this paper, the transient absorption spectrometer with super high sensitivity can study the ultra-fast carrier dynamics under low power pump,and avoid the influence of the nonlinear effect related to high carrier density and multi-body interaction ,so as to obtain the carrier dynamics information of perovskite film in the real working environment. Key words: transient absorption spectroscopy; perovskite |
