Optoelectronic characterization of printed organic solar cells

印刷有机太阳能电池的光电表征

• 批准号: 511601385
• 负责人: Professor Dr. Dieter Neher
• 金额: --
• 依托单位: Institut für Physik und Astronomie
• 依托单位国家: 德国
• 项目类别: Research Units
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/511601385?language=en
• 关键词: Optoelectronic; characterization; printed; organic; solar

For non-fullerene acceptor (NFA)-based organic solar cells, highest efficiencies are reported with spin-coated photoactive layers, from halogenated solvent with ca. 100 nm thick active layers. Such layers were shown to exhibit a well-defined intermolecular nanostructure and low energetic disorder. The situation may largely change when printing thicker active layers from non-chlorinated solvents. In this proposal, we will link energetic disorder to the photovoltaic parameters by providing detailed analysis between properties of printed devices formed from benign solvents and those of spin-coated state-of-the-art solar cells. Thicker active layers printed from non-halogenated solvents are anticipated to have different miscibility, interfacial interaction and morphology thereby energetic disorder. To this end in the project we will employ transient absorption, time-delayed collection field and photocurrent-photoinduced absorption to study, free charge generation and recombination as a function of field and temperature. On the other hand, space limited charge current measurements will be used to quantify energetic disorder and mobility of printed devices. The results will enter detailed device simulation together with groups of the consortium. Our investigations will start with selected material combinations for which high efficiencies are already reported on spin-coated devices and continue with single component active layers to be developed in course of this Research Unit, which will also from the focus of the second funding period.

对于基于非富勒烯受体 (NFA) 的有机太阳能电池，据报道，使用约 100% 卤化溶剂的旋涂光敏层可实现最高效率。 100 nm 厚的有源层。这些层表现出明确的分子间纳米结构和低能无序。当使用非氯化溶剂打印较厚的活性层时，情况可能会发生很大变化。在该提案中，我们将通过对由良性溶剂形成的印刷器件和旋涂最先进的太阳能电池的特性进行详细分析，将能量无序与光伏参数联系起来。由非卤化溶剂印刷的较厚的活性层预计具有不同的混溶性、界面相互作用和形态，从而产生能量紊乱。为此，在该项目中，我们将采用瞬态吸收、延时收集场和光电流光致吸收来研究自由电荷的产生和复合作为场和温度的函数。另一方面，空间有限的充电电流测量将用于量化印刷设备的能量无序和迁移率。结果将与联盟小组一起进入详细的设备模拟。我们的研究将从选定的材料组合开始，这些材料组合已经在旋涂器件上报告了高效率，并继续在该研究单位的过程中开发单组分活性层，这也将是第二个资助期的重点。