From spin coating to roll-to-roll: investigating the challenge of upscaling lead halide perovskite solar cells
From spin coating to roll-to-roll: investigating the challenge of upscaling lead halide perovskite solar cells
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DOI：
10.1049/iet-rpg.2016.0683
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发表时间：
2017-04-12
影响因子：
2.6
通讯作者：
Watson, Trystan M.
中科院分区：
文献类型：
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作者：
Baker, Jennifer A.;Mouhamad, Youmna;Watson, Trystan M.
旋涂通常用于获得纳米厚的薄膜，是实验室规模沉积用于太阳能电池的钙钛矿前驱体的既定方法。本研究探讨了旋涂钙钛矿的动力学。通过实验测量和半经验模型相结合，确定了混合卤化铅前驱体旋涂过程中二甲基甲酰胺溶剂的挥发速率为1.2×10~(-8)m/S。当K-bar镀膜时，溶剂在沉积过程中没有显着蒸发，而当该膜在热板上结晶时，得到一种粗糙的薄膜，其功率转换效率(PCE)小于2%。通过增加K-bar涂层钙钛矿薄膜结晶过程中的空气流量至2.7×10~(-4)m/S，短路电流和填充因子的改善，PCE显着增加到8.5%。
Spin coating, typically used to achieve nanometre thick films, is the established method for depositing perovskite precursors at lab scale for use in solar cells. This study investigates the dynamics of spin coating perovskite. By combining experimental measurement with a semi-empirical model the evaporation rate of the dimethylformamide solvent during the spin coating of a mixed lead halide precursor is determined to be 1.2 x 10(-8) m/s. When K-bar coating the same precursor the solvent does not significantly evaporate during the deposition process and when this film is crystallised on a hot plate a rough film results which gives a power conversion efficiency (PCE) of less than 2%. By increasing the airflow of the K-bar coated perovskite film during crystallisation to 2.7 x 10(-4) m/s the PCE increases significantly to 8.5% through an improvement in shortcircuit current and fill factor.