Impedance Spectroscopic Analysis of Lead Iodide Perovskite-Sensitized Solid-State Solar Cells
Impedance Spectroscopic Analysis of Lead Iodide Perovskite-Sensitized Solid-State Solar Cells
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DOI：
10.1021/nn404323g
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发表时间：
2014-01-01
期刊：
影响因子：
17.1
通讯作者：
Graetzel, Michael
中科院分区：
文献类型：
--
作者：
Dualeh, Amalie;Moehl, Thomas;Graetzel, Michael
利用阻抗谱（IS）研究了以无机-有机杂化钙钛矿CH（3）NH（3）Pbl（3）和非晶有机半导体螺-MeO 2作为空穴传输材料（HIM）的介观固态太阳能电池。通过扩展和阐述用于液体和固态染料敏化太阳能电池的现有模型，建立了解释这些器件的频率响应的模型。此外，改变叔丁基吡啶和LiTFSI在HIM中的添加剂浓度和改变在亚微米厚的TiO 2的顶部上的HIM覆盖层厚度对提取的IS参数的影响进行了研究。这种设备的内部电气过程进行了研究，并与整体设备的性能。特别是，在IS响应归因于钙钛矿材料的离子和电子输运性质，并表现为在低频下的缓慢响应和在中频下的额外RC元素，分别探讨的功能。
Mesoscopic solid-state solar cells based on the inorganic-organic hybrid perovskite CH(3)NH(3)Pbl(3) in conjunction with the amorphous organic semiconductor spiro-MeOTAD as a hole transport material (HIM) are investigated using impedance spectroscopy (IS). A model to interpret the frequency response of these devices is established by expanding and elaborating on the existing models used for the liquid and solid-state dye-sensitized solar cells. Furthermore, the influence of changing the additive concentrations of tert-butylpyridine and LiTFSI in the HIM and varying the HIM overlayer thickness on top of the sub-micrometer thick TiO2 on the extracted IS parameters is investigated. The internal electrical processes of such devices are studied and correlated with the overall device performance. In particular, the features in the IS responses that are attributed to the ionic and electronic transport properties of the perovskite material and manifest as a slow response at low frequency and an additional RC element at intermediate frequency, respectively, are explored.