Dynamic luminescence behavior by external stimuli, such as light, thermal field, electricity, mechanical force, etc., endows the materials with great promise in optoelectronic applications. Upon thermal stimulus, the emission is inevitably quenched due to intensive non-radiative transition, especially for phosphorescence at high temperature. Herein, we report an abnormal thermally-stimulated phosphorescence behavior in a series of organic phosphors. As temperature changes from 198 to 343 K, the phosphorescence at around 479 nm gradually enhances for the model phosphor, of which the phosphorescent colors are tuned from yellow to cyan-blue. Furthermore, we demonstrate the potential applications of such dynamic emission for smart dyes and colorful afterglow displays. Our results would initiate the exploration of dynamic high-temperature phosphorescence for applications in smart optoelectronics. This finding not only contributes to an in-depth understanding of the thermally-stimulated phosphorescence, but also paves the way toward the development of smart materials for applications in optoelectronics.

光、热场、电、机械力等外部刺激下的动态发光行为赋予该材料在光电应用中的巨大前景。在热刺激下，由于强烈的非辐射跃迁，发射不可避免地被猝灭，特别是对于高温下的磷光。在此，我们报告了一系列有机磷光体中异常的热刺激磷光行为。随着温度从198 K变化到343 K，模型荧光粉在479 nm附近的磷光逐渐增强，其磷光颜色从黄色调谐到青蓝色。此外，我们还展示了这种动态发射在智能染料和彩色余辉显示器中的潜在应用。我们的研究结果将开启动态高温磷光在智能光电领域的应用探索。这一发现不仅有助于深入了解热激发磷光，而且为开发用于光电子学应用的智能材料铺平了道路。