Designing organic afterglow materials with a high efficiency and long lifetime is highly attractive but challenging because of the inherent competition between the luminescence efficiency and lifetime. Here, we propose a simple yet efficient strategy, namely fluorine-induced aggregate-interlocking (FIAI), to realize both an enhanced efficiency and elongated lifetime of afterglow materials by stimulating the synergistic effects of the introduced fluorine atoms to efficiently promote intersystem crossing (ISC) and intermolecular non-covalent interactions for facilitating both the generation of triplet excitons and suppression of non-radiative decays. Thus, the fluorine-incorporated afterglow molecules exhibit greatly enhanced ISC with a rate constant up to 5.84 × 10⁷ s⁻¹ and suppressed non-radiative decay down to 0.89 s⁻¹, resulting in efficient organic afterglow with a simultaneously improved efficiency up to 10.5% and a lifetime of 1.09 s. Moreover, accompanied by the efficient phosphorescence emission especially at cryogenic temperature, color-tunable afterglow was also observed at different temperatures. Therefore, tri-mode multiplexing encryption devices by combining lifetime, temperature and color, and visual temperature sensing were successfully established. The FIAI strategy by addressing fundamental issues of afterglow emission paves the way to develop high-performance organic afterglow materials, opening up a broad prospect of aggregated and excited state tuning of organic solids for emission lifetime-resolved applications.

中文翻译：

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氟诱导的聚集体联锁可实现颜色可调的有机余辉，同时提高效率和寿命

由于发光效率和寿命之间存在固有的竞争，设计具有高效率和长寿命的有机余辉材料非常有吸引力，但也具有挑战性。在这里，我们提出了一种简单而有效的策略，即氟诱导聚集​​联锁（FIAI），通过刺激引入的氟原子的协同效应，有效促进系间窜越（ISC），从而实现余辉材料的效率提高和寿命延长。 ）和分子间非共价相互作用，以促进三线态激子的产生和非辐射衰变的抑制。因此，掺氟余辉分子表现出极大增强的ISC，速率常数高达5.84 × 10 ⁷ s ^-1，并将非辐射衰减抑制低至0.89 s ^-1，从而产生高效的有机余辉，同时效率提高至10.5%，寿命为 1.09 秒。此外，伴随着特别是在低温下的有效磷光发射，在不同温度下也观察到了颜色可调的余辉。因此，成功建立了结合寿命、温度和颜色以及视觉温度传感的三模复用加密装置。FIAI策略通过解决余辉发射的基本问题，为开发高性能有机余辉材料铺平了道路，为有机固体的聚集态和激发态调节以实现发射寿命解析的应用开辟了广阔的前景。