In organic and low-dimensional materials, electrons and holes are bound together to form excitons. Effective exciton dissociation at interfaces is essential for applications such as photovoltaics and photosensing. Here, we present an interface-sensitive, time-resolved method that utilizes graphene field effect transistor as an electric-field sensor to measure the charge separation dynamics and yield at donor–acceptor interfaces. Compared to other interface-sensitive spectroscopy techniques, our method has a much reduced measurement time and can be easily adapted to different material interfaces. Hence, it can be used as a high throughput screening tool to evaluate the charge separation efficiency in a large number of systems. By using zinc phthalocyanine/fullerene interface, we demonstrate how this method can be used to quantify the charge separation dynamics and yield at a typical organic donor–acceptor interface.

中文翻译：

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石墨烯场效应晶体管作为高通量平台，可探测供体-受体界面处的电荷分离

在有机和低维材料中，电子和空穴结合在一起形成激子。界面处的有效激子离解对于光伏和光敏器件等应用至关重要。在这里，我们介绍了一种界面敏感的时间分辨方法，该方法利用石墨烯场效应晶体管作为电场传感器来测量电荷分离动力学和施主-受主界面的产率。与其他界面敏感光谱技术相比，我们的方法大大减少了测量时间，并且可以轻松地适应不同的材料界面。因此，它可以用作高通量筛选工具，以评估大量系统中的电荷分离效率。通过使用酞菁锌/富勒烯锌界面，