Effect of Annealing Temperature on Film Morphology of Organic-Inorganic Hybrid Pervoskite Solid-State Solar Cells
Effect of Annealing Temperature on Film Morphology of Organic-Inorganic Hybrid Pervoskite Solid-State Solar Cells
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DOI：
10.1002/adfm.201304022
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发表时间：
2014-06-01
影响因子：
19
通讯作者：
Graetzel, Michael
中科院分区：
文献类型：
--
作者：
Dualeh, Amalie;Tetreault, Nicolas;Graetzel, Michael
有机无机杂种钙钛矿吸引了对介观固态太阳能电池的成功收获材料引起的关注，并导致了破坏性的效率。这些设备的光伏性能在很大程度上取决于膜形态，这反过来依赖于沉积技术和随后的处理方法。在这项工作中，钙钛矿膜是通过在二甲基甲酰胺中旋转PBCL2和CH3NH3I（1至3摩尔比）的前体溶液来沉积的。在这里，研究了将AS沉积溶液转换为钙钛矿材料所需的温度的作用。发现转化率需要足够高的温度，以确保溶剂的蒸发和钙钛矿材料的结晶。但是，增加退火温度过高会导致PBI2的额外形成，这对光伏性能有害。此外，检查退火温度对膜形成，形态和组成的影响与光伏性能和设备工作机制相关。
Organic-inorganic hybrid perovskites have attracted attention as successful light harvesting materials for mesoscopic solid-state solar cells and led to record breaking efficiencies. The photovoltaic performance of these devices is greatly dependent on the film morphology, which in turn is dependent on the deposition techniques and subsequent treatments employed. In this work the perovskite film is deposited by spin-coating a precursor solution of PbCl2 and CH3NH3I (1 to 3 molar ratio) in dimethylformamide. Here, the role of the temperature used in the annealing process required to convert the as deposited solution into the perovskite material is investigated. It is found that the conversion requires sufficiently high temperatures to ensure the vaporization of solvent and the crystallization of the perovskite material. However, increasing the annealing temperature too high leads to the additional formation of PbI2, which is detrimental to the photovoltaic performance. Furthermore, the effect of the annealing temperature on the film formation, morphology, and composition is examined and correlated with the photovoltaic performance and device working mechanisms.