Organic long-persistent-luminescent (OLPL) materials demonstrating hour-long photoluminescence have practical advantages in applications owing to their flexible design and easy processability. However, the energy absorbed in these materials is typically stored in an intermediate charge-separated state that is unstable when exposed to oxygen, thus preventing persistent luminescence in air unless oxygen penetration is suppressed through crystallization. Moreover, OLPL materials usually require ultraviolet excitation. Here we overcome such limitations and demonstrate amorphous OLPL systems that can be excited by radiation up to 600 nm and exhibit persistent luminescence in air. By adding cationic photoredox catalysts as electron-accepting dopants in a neutral electron-donor host, stable charge-separated states are generated by hole diffusion in these blends. Furthermore, the addition of hole-trapping molecules extends the photoluminescence lifetime. By using a p-type host less reactive to oxygen and tuning the donor–acceptor energy gap, our amorphous blends exhibit persistent luminescence stimulated by visible light even in air, expanding the applicability of OLPL materials.

具有长达一小时光致发光的有机长余辉发光 (OLPL) 材料由于其灵活的设计和易于加工的特性而在应用中具有实际优势。然而，这些材料吸收的能量通常以中间电荷分离状态存储，当暴露于氧气时这种状态不稳定，因此除非通过结晶抑制氧气渗透，否则会阻止空气中的持续发光。此外，OLPL材料通常需要紫外激发。在这里，我们克服了这些限制，并展示了可以被高达 600 nm 的辐射激发并在空气中表现出持久发光的非晶 OLPL 系统。通过在中性电子供体主体中添加阳离子光氧化还原催化剂作为电子接受掺杂剂，这些混合物中的空穴扩散会产生稳定的电荷分离态。此外，空穴捕获分子的添加延长了光致发光寿命。通过使用对氧反应性较低的 p 型主体并调整供体-受体能隙，我们的无定形混合物即使在空气中也表现出受可见光刺激的持久发光，从而扩大了 OLPL 材料的适用性。