Department of Energy Conversion and Storage, Technical University of Denmark.
Department of Energy Conversion and Storage, Technical University of Denmark;
J Vis Exp. 2021 Mar 2(169). doi: 10.3791/61374.
We present an in-house, in situ Grazing Incidence Small Angle X-ray Scattering (GISAXS) experiment, developed to probe the drying kinetics of roll-to-roll slot-die coating of the active layer in organic photovoltaics (OPVs), during deposition. For this demonstration, the focus is on the combination of P3HT:O-IDTBR and P3HT:EH-IDTBR, which have different drying kinetics and device performance, despite their chemical structure only varying slightly by the sidechain of the small molecule acceptor. This article provides a step-by-step guide to perform an in situ GISAXS experiment and demonstrates how to analyze and interpret the results. Usually, performing this type of in situ X-ray experiments to investigate the drying kinetics of the active layer in OPVs relies on access to synchrotrons. However, by using and further developing the method described in this paper, it is possible to perform experiments with a coarse temporal and spatial resolution, on a day-to-day basis to gain fundamental insight in the morphology of drying inks.
我们提出了一种内部原位掠入射小角 X 射线散射（GISAXS）实验，旨在探测有机光伏（OPV）活性层辊到辊狭缝涂布在沉积过程中的干燥动力学。为此演示，重点是 P3HT:O-IDTBR 和 P3HT:EH-IDTBR 的组合，尽管它们的化学结构仅通过小分子受体的侧链略有变化，但它们具有不同的干燥动力学和器件性能。本文提供了执行原位 GISAXS 实验的分步指南，并演示了如何分析和解释结果。通常，进行这种类型的原位 X 射线实验来研究 OPV 中活性层的干燥动力学需要使用同步加速器。然而，通过使用和进一步开发本文中描述的方法，有可能在日常基础上进行具有粗糙时间和空间分辨率的实验，以深入了解干燥油墨的形态。
