Antisolvent with an Ultrawide Processing Window for the One‐Step Fabrication of Efficient and Large‐Area Perovskite Solar Cells,Advanced Materials

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Antisolvent with an Ultrawide Processing Window for the One‐Step Fabrication of Efficient and Large‐Area Perovskite Solar Cells
Advanced Materials ( IF 27.4 ) Pub Date : 2018-10-10 , DOI: 10.1002/adma.201802763
Pengjun Zhao ₁ , Byeong Jo Kim ₁ , Xiaodong Ren ₁ , Dong Geon Lee ₁ , Gi Joo Bang ₁ , Jae Bum Jeon ₁ , Won Bin Kim ₁ , Hyun Suk Jung ₁

Affiliation

Photovoltaic technologies based on perovskite absorber materials have led this optoelectronic field into a brand‐new horizon. However, the present antisolvents used in the one‐step spin‐coating method always encounter problems with the very narrow process window. Herein, anisole is introduced into the one‐step spin‐coating method, and the technology is developed to fabricate perovskite thin films with ultrawide processing window with a dimethylformamide (DMF):dimethyl sulfoxide (DMSO) ratio varying from 6:4 to 9:1 in the precursor solution, anisole dripping time ranging from 5 to 25 s, and an antisolvent volume varying from 0.1 to 0.9 mL. Perovskite thin films as large as 100 cm² are successfully fabricated using this method. Maximum photoelectric conversion efficiencies of 19.76% for small‐area (0.14 cm²) and 17.39% for large‐area (1.08 cm²) perovskite solar cell devices are obtained. It is also found that there are intermolecular hydrogen‐bonding forces between anisole and DMF/DMSO that play critical roles in the wide process window. These results provide a deeper understanding of the crystallizing procedure of perovskite during the one‐step spin‐coating process.

中文翻译：

具有超宽处理窗口的抗溶剂，可一步一步制造高效大面积的钙钛矿太阳能电池

基于钙钛矿吸收体材料的光伏技术将这一光电领域带入了崭新的视野。但是，目前用于一步旋涂方法中的抗溶剂总是遇到工艺窗口非常狭窄的问题。在本文中，将苯甲醚引入一步旋涂方法中，并开发了该技术以制造超宽加工窗口的钙钛矿薄膜，其二甲基甲酰胺（DMF）：二甲基亚砜（DMSO）比率从6：4到9：在前体溶液中的浓度为1，苯甲醚的滴落时间为5到25 s，抗溶剂量为0.1到0.9 mL。使用这种方法成功地制造了最大100 cm ^2的钙钛矿薄膜。小面积（0.14 cm）的最大光电转换效率为19.76％对于大面积（1.08 cm ²）的钙钛矿型太阳能电池装置，获得了²）和17.39％的能量。还发现在整个过程窗口中，苯甲醚和DMF / DMSO之间存在分子间氢键合力。这些结果使人们对钙钛矿的一步旋涂过程中的结晶过程有了更深入的了解。

更新日期：2018-10-10

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