Ozaki Masashi, Shimazaki Ai, Jung Mina, Nakaike Yumi, Maruyama Naoki, Yakumaru Shinya, Rafieh Alwani Imanah, Sasamori Takahiro, Tokitoh Norihiro, Ekanayake Piyasiri, Murata Yasujiro, Murdey Richard, Wakamiya Atsushi
Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan.
Centre for Advanced Material and Energy Sciences, Universiti Brunei Darussalam, Jalan Tungku Link, BE1410, Brunei.
Angew Chem Int Ed Engl. 2019 Jul 8;58(28):9389-9393. doi: 10.1002/anie.201902235. Epub 2019 May 27.
A high-purity methylammonium lead iodide complex with intercalated dimethylformamide (DMF) molecules, CH NH PbI ⋅DMF, is introduced as an effective precursor material for fabricating high-quality solution-processed perovskite layers. Spin-coated films of the solvent-intercalated complex dissolved in pure dimethyl sulfoxide (DMSO) yielded thick, dense perovskite layers after thermal annealing. The low volatility of the pure DMSO solvent extended the allowable time for low-speed spin programs and considerably relaxed the precision needed for the antisolvent addition step. An optimized, reliable fabrication method was devised to take advantage of this extended process window and resulted in highly consistent performance of perovskite solar cell devices, with up to 19.8 % power-conversion efficiency (PCE). The optimized method was also used to fabricate a 22.0 cm , eight-cell module with 14.2 % PCE (active area) and 8.64 V output (1.08 V/cell).
一种插入二甲基甲酰胺（DMF）分子的高纯度甲基碘化铅配合物CH₃NH₃PbI₃·DMF被用作制备高质量溶液处理钙钛矿层的有效前驱体材料。溶解在纯二甲基亚砜（DMSO）中的溶剂插入配合物的旋涂膜在热退火后产生了厚而致密的钙钛矿层。纯DMSO溶剂的低挥发性延长了低速旋涂程序的允许时间，并大大放宽了反溶剂添加步骤所需的精度。设计了一种优化、可靠的制造方法来利用这个延长的工艺窗口，从而使钙钛矿太阳能电池器件具有高度一致的性能，功率转换效率（PCE）高达19.8%。该优化方法还用于制造一个22.0平方厘米的八电池模块，其PCE为14.2%（活性面积），输出电压为8.64伏（每电池1.08伏）。
