School of Material Science and Engineering, Research Institute for Solar and Sustainable Energies, Gwangju Institute of Science and Technology , Gwangju 500-712, Republic of Korea.
Carbon Convergence Materials Research Center, Institute of Advanced Composite Materials, Korea Institute of Science and Technology , Jeollabukdo 565-905, Republic of Korea.
ACS Appl Mater Interfaces. 2017 Aug 23;9(33):27832-27838. doi: 10.1021/acsami.7b05078. Epub 2017 Aug 9.
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 CHNHPbI (MAPbI) 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.
尽管卷对卷处理在制备钙钛矿薄膜方面具有潜力，但通过连续涂层技术和低温处理实现高效且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，可以通过印刷工艺实现高效且可靠的 CHNHPbI（MAPbI）薄膜。值得注意的是，这些钙钛矿薄膜是从预混合的钙钛矿溶液中沉积而来的，可在室温下和环境气氛中通过简便的一步法处理进行沉积。CHP 分子即使在一步狭缝模头系统中也能产生均匀且均匀的钙钛矿薄膜，这归因于 CHP 的高沸点和低蒸气压。同时，DMSO 分子通过与钙钛矿前驱体分子形成中间状态来促进钙钛矿晶粒的生长。因此，基于二元添加剂体系的全印刷 PeSC 表现出 12.56%的高光能量转换效率，具有很高的重现性。
