It is well-known that benzophenone has a short phosphorescence lifetime of around 1 ms even at 77 K. Here we report a benzophenone-containing emitter with an unprecedented long phosphorescence lifetime of 1.8 s under ambient conditions, which can be attributed to its T₁ state of localized excitation nature as revealed by detailed studies.

中文翻译：

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含二苯甲酮的荧光粉在环境条件下具有 1.8 秒的前所未有的长寿命

众所周知，即使在 77 K 时，二苯甲酮的磷光寿命也只有 1 ms 左右。在这里，我们报告了一种含二苯甲酮的发射体，在环境条件下磷光寿命达到前所未有的 1.8 s，这可归因于其 T ₁详细研究揭示的局部激发性质的状态。