Organic semiconductors (OSCs) are one of the most promising candidates for flexible, wearable and large-area electronics. However, the development of n-type OSCs has been severely held back due to the poor stability of their most candidates, that is, the intrinsically high reactivity of negatively charged polarons to oxygen and water. Here we demonstrate a general strategy based on vitamin C to stabilize n-type OSCs, remarkably improving the performance and stability of their device, for example, organic field-effect transistors. Vitamin C scavenges reactive oxygen species and inhibits their generation by sacrificial oxidation and non-sacrificial triplet quenching in a cascade process, which not only lastingly prevents molecular structure from oxidation damage but also passivates the latent electron traps to stabilize electron transport. This study presents a way to overcome the long-standing stability problem of n-type OSCs and devices.

有机半导体（OSC）是柔性、可穿戴和大面积电子产品最有前途的候选者之一。然而，由于大多数候选材料稳定性差，即带负电的极化子对氧和水的固有高反应性，n型OSC的发展受到严重阻碍。在这里，我们展示了一种基于维生素 C 来稳定 n 型 OSC 的总体策略，显着提高了其器件（例如有机场效应晶体管）的性能和稳定性。维生素C通过级联过程中的牺牲氧化和非牺牲三线态猝灭来清除活性氧并抑制其产生，这不仅持久地防止分子结构受到氧化损伤，而且还钝化潜电子陷阱以稳定电子传输。这项研究提出了一种克服 n 型 OSC 和器件长期存在的稳定性问题的方法。