Afterglow materials have become one of the most promising luminescent materials due to their long luminescence lifetime. Photoluminescence quantum yield (PLQY), as one of the most fundamental and essential parameters of luminescent materials, can directly evaluate the luminescence properties of emissive compounds. Recently, a type of afterglow material based on a photochemical reaction has been developed. However, there is no suitable method to measure the PLQY of these afterglow materials due to their special luminescence principle. Herein, we present a method to measure the PLQY for these afterglow materials by collecting the luminescent dynamic curves of emission and excitation light at specific wavelength regions using a commercial spectrometer and an integrating sphere. We found that the emitted photons of this kind of afterglow material are in direct proportion to the excitation time, which means the PLQY is irrelevant to the excitation time.

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基于光化学反应的余辉发光材料的量子产率测量

余辉材料由于其长的发光寿命而成为最有前途的发光材料之一。光致发光量子产率（PLQY）作为发光材料最基本和必不可少的参数之一，可以直接评价发光化合物的发光性能。最近，已经开发出一种基于光化学反应的余辉材料。然而，由于其特殊的发光原理，没有合适的方法来测量这些余辉材料的PLQY。在此，我们提出了一种通过使用商用光谱仪和积分球收集特定波长区域的发射和激发光的发光动态曲线来测量这些余辉材料的 PLQY 的方法。