One-Step Printable Perovskite Films Fabricated under Ambient Conditions for Efficient and Reproducible Solar Cells
One-Step Printable Perovskite Films Fabricated under Ambient Conditions for Efficient and Reproducible Solar Cells
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DOI：
10.1021/acsami.7b05078
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发表时间：
2017-08-23
影响因子：
9.5
通讯作者：
Kim, Dong-Yu
中科院分区：
文献类型：
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作者：
Jung, Yen-Sook;Hwang, Kyeongil;Kim, Dong-Yu
尽管卷对卷工艺在制备钙钛矿薄膜方面具有潜力，但通过连续镀膜技术和低温处理实现高效和可重复的钙钛矿太阳能电池(PeSCs)仍然具有挑战性。在这里，我们证明了通过二元加工添加剂N-环己基-2-吡咯烷酮(CHP)和二甲基亚砜(DMSO)的协同作用，可以通过印刷工艺制备高效可靠的CH3NH3PbI3(MAPbI(3))薄膜。值得注意的是，这些钙钛矿膜是从预混合的钙钛矿溶液中沉积出来的，在室温和环境气氛下进行简单的一步处理。由于CHP的高沸点和低蒸汽压，即使在一步缝模系统中，CHP分子也可以得到均匀均匀的钙钛矿膜。同时，DMSO分子通过与钙钛矿前驱体分子形成中间态，促进了钙钛矿颗粒的生长。因此，基于二元添加剂体系的全印刷PESC具有高的PCE(12.56%)和高的重现性。
Despite the potential of roll-to-roll processing for the fabrication of perovskite films, the realization of highly efficient and reproducible perovskite solar cells (PeSCs) through continuous coating techniques and low-temperature processing is still challenging. Here, we demonstrate that efficient and reliable CH3NH3PbI3 (MAPbI(3)) films fabricated by a printing process can be achieved through synergetic effects of binary processing additives, N-cyclohexyl-2-pyrrolidone (CHP) and dimethyl sulfoxide (DMSO). Notably, these perovskite films are deposited from premixed perovskite solutions for facile one-step processing under a room-temperature and ambient atmosphere. The CHP molecules result in the uniform and homogeneous perovskite films even in the one-step slot-die system, which originate from the high boiling point and low vapor pressure of CHP. Meanwhile, the DMSO molecules facilitate the growth of perovskite grains by forming intermediate states with the perovskite precursor molecules. Consequently, fully printed PeSC based on the binary additive system exhibits a high PCE of 12.56% with a high reproducibility.