Coordination Funds

POPULAR研究单位的目标是研究基于非富勒烯受体（NFA）的高效有机太阳能电池的印刷。虽然光伏器件的印刷通常是通过工业重点开发来实现商业化，但我们相信印刷对有机太阳能电池的薄膜形成和特定微观结构的影响值得进行详细的基础研究：我们的联合理论和实验方法旨在深入了解功能-性能关系。我们将应用凹版印刷，首先在系统变化的处理条件下，从不同的供体-受体组合印刷太阳能电池的光活性层。首先，我们将只印刷有源层，并通过旋涂和热蒸发存款其他层。此后，我们将处理完全打印的设备。具有相同太阳能电池堆的实验室规模的旋涂设备将作为参考。我们的研究重点将放在纳米形态的物理、光学性质、能量学等方面。这些信息将与在工作条件下测量的光生和复合过程相结合，并通过数值器件模拟使用多实验拟合进行建模。我们将使用有前途的，商业上可用的NFA来建立打印过程，选择设备架构。随后，具有预定长度的单分散片段的新型供体NFA多嵌段共聚低聚物-将在本研究单元中合成-以产生热稳定的层状形态，将被集成到印刷的单组分太阳能电池中。该提案的一个重要方面将是理解固有稳定性，限制设备性能随时间的推移，并尽量减少退化。通过我们的组合，互补的方法，我们将深入了解新型印刷无富勒烯有机太阳能电池的功能-性能关系，同时开发适合最佳光伏性能的印刷工艺。

The goal of the Research Unit POPULAR is to investigate the printing of efficient organic solar cells based on non-fullerene acceptors (NFAs). While printing of photovoltaic devices is usually done by industrially focused development with a view to commercialisation, we are convinced that the impact of printing on film formation and specific microstructure of organic solar cells deserves a detailed fundamental investigation: Our joint theoretical and experimental approach is designed to develop a deep understanding of the function–property relationships. We will apply gravure printing to first print the photoactive layer of the solar cells from different donor–acceptor combinations under systematically varied processing conditions. First, we will only print the active layer, and deposit the other layers by spin-coating and thermal evaporation. Thereafter, we will process fully-printed devices. Lab-scale spin-coated devices with the same solar cell stack will serve as reference. We will focus our study particularly on the photophysics, optical properties, energetics in dependence on the nanomorphology. This information will be combined with the photogeneration and recombination processes measured under working conditions, and modelled using multi-experiment fitting by numerical device simulations. We will use promising, commercially available NFAs to establish the printing processes, select the device architecture. Later on, novel donor NFA multiblock co-oligomers with monodisperse segments of predefined length – which will be synthesised in this Research Unit – to yield a thermodynamically stable lamellar morphology, will be integrated into printed single-component solar cells. An important aspect of this proposal will be on understanding intrinsic stability, limiting the device performance over time, and minimising degradation. With our combined, complementary approach, we will gain deep insight into the function–property relation of novel, printed fullerene-free organic solar cells, while developing the printing process tailored to the best photovoltaic performance.