Noel Nakita K, Wenger Bernard, Habisreutinger Severin N, Snaith Henry J
Clarendon Laboratory, Department of Physics, University of Oxford, Parks Road, Oxford OX1 3PU, U.K.
Princeton Institute for the Science and Technology of Materials, Princeton University, 70 Prospect Avenue, Princeton, New Jersey 08544, United States.
ACS Energy Lett. 2022 Apr 8;7(4):1246-1254. doi: 10.1021/acsenergylett.2c00120. Epub 2022 Mar 3.
Having captivated the research community with simple fabrication processes and staggering device efficiencies, perovskite-based optoelectronics are already on the way to commercialization. However, one potential obstacle to this commercialization is the almost exclusive use of toxic, highly coordinating, high boiling point solvents to make perovskite precursor inks. Herein, we demonstrate that nonpolar organic solvents, such as toluene, can be combined with butylamine to form an effective solvent for alkylammonium-based perovskites. Beyond providing broader solvent choice, our finding opens the possibility of blending perovskite inks with a wide range of previously incompatible materials, such as organic molecules, polymers, nanocrystals, and structure-directing agents. As a demonstration, using this solvent, we blend the perovskite ink with 6,6-phenyl-C-61-butyric acid methyl ester and show improved perovskite crystallization and device efficiencies. This processing route may enable a myriad of new possibilities for tuning the active layers in efficient photovoltaics, light-emitting diodes, and other semiconductor devices.
基于钙钛矿的光电器件凭借简单的制造工艺和惊人的器件效率吸引了研究界的关注，目前已走上商业化道路。然而，这种商业化的一个潜在障碍是，几乎完全使用有毒、具有高配位性、高沸点的溶剂来制备钙钛矿前驱体墨水。在此，我们证明非极性有机溶剂（如甲苯）可与丁胺混合，形成一种用于烷基铵基钙钛矿的有效溶剂。除了提供更广泛的溶剂选择外，我们的发现还开启了将钙钛矿墨水与多种先前不相容的材料（如有机分子、聚合物、纳米晶体和结构导向剂）混合的可能性。作为一个示例，使用这种溶剂，我们将钙钛矿墨水与6,6-苯基-C-61-丁酸甲酯混合，并展示出改进的钙钛矿结晶和器件效率。这种加工路线可能为调整高效光伏、发光二极管和其他半导体器件中的活性层带来无数新的可能性。
