Eco‐Friendly Solvent Engineered CsPbI 2.77 Br 0.23 Ink for Large‐Area and Scalable High Performance Perovskite Solar Cells
Eco‐Friendly Solvent Engineered CsPbI 2.77 Br 0.23 Ink for Large‐Area and Scalable High Performance Perovskite Solar Cells
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用于大面积和可扩展高性能钙钛矿太阳能电池的环保型溶剂工程 CsPbI 2.77 Br 0.23 墨水
DOI：
10.1002/adma.202310279
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发表时间：
2023
影响因子：
29.4
通讯作者：
Dai, Qilin
中科院分区：
文献类型：
--
作者：
Abate, Seid Yimer;Qi, Yifang;Zhang, Qiqi;Jha, Surabhi;Zhang, Haixin;Ma, Guorong;Gu, Xiaodan;Wang, Kun;Patton, Derek;Dai, Qilin
已使用刮刀涂布机、缝模涂布机、溶液剪切、喷墨印刷和热蒸发，针对甲基铵碘化铅（MAPbI 3）等典型成分评估了大面积钙钛矿太阳能电池（PSC）的性能。然而，大面积全无机钙钛矿薄膜的制造还没有得到很好的发展。这项研究首次开发了一种生态友好的溶剂工程全无机钙钛矿墨水，二甲基亚砜（DMSO）作为主要溶剂，添加乙腈（ACN），2-甲氧基乙醇（2-ME）或ACN和2-ME的混合物，以在低温（40-50 °C）下用狭缝式涂布机制造大面积CsPbI2.77Br0.23薄膜。对不同溶剂配比制备的钙钛矿相、形貌、缺陷密度和光电性能进行了深入研究，并将其与各自的胶体尺寸分布和太阳能电池性能进行了关联。优化后的狭缝模头涂覆CsPbI2.77Br0.23钙钛矿薄膜由环保二元溶剂二甲基亚砜：乙腈（0.8：0.2 v/v）制备，具有令人印象深刻的19.05%的功率转换效率（PCE）。此外，该设备在黑暗中20%相对湿度下1个月后保持其原始PCE的1.91%。相信这项研究将加速钙钛矿器件的可靠制造。
The performance of large‐area perovskite solar cells (PSCs) has been assessed for typical compositions, such as methylammonium lead iodide (MAPbI3), using a blade coater, slot‐die coater, solution shearing, ink‐jet printing, and thermal evaporation. However, the fabrication of large‐area all‐inorganic perovskite films is not well developed. This study develops, for the first time, an eco‐friendly solvent engineered all‐inorganic perovskite ink of dimethyl sulfoxide (DMSO) as a main solvent with the addition of acetonitrile (ACN), 2‐methoxyethanol (2‐ME), or a mixture of ACN and 2‐ME to fabricate large‐area CsPbI2.77Br0.23films with slot‐die coater at low temperatures (40–50 °C). The perovskite phase, morphology, defect density, and optoelectrical properties of prepared with different solvent ratios are thoroughly examined and they are correlated with their respective colloidal size distribution and solar cell performance. The optimized slot‐die‐coated CsPbI2.77Br0.23perovskite film, which is prepared from the eco‐friendly binary solvents dimethyl sulfoxide:acetonitrile (0.8:0.2 v/v), demonstrates an impressive power conversion efficiency (PCE) of 19.05%. Moreover, the device maintains ≈91% of its original PCE after 1 month at 20% relative humidity in the dark. It is believed that this study will accelerate the reliable manufacturing of perovskite devices.