One of the major limitations of solid-state perovskite-sensitized photon upconversion to date is that the only annihilator successfully paired with the perovskite sensitizer has been rubrene, raising the question of whether this appraoch of triplet sensitization is universal or limited in scope. Additionally, the inherent energetic mismatch between the perovskite bandgap and the rubrene triplet energy has restricted the apparent anti-Stokes shift achievable in the upconversion process. To increase the apparent anti-Stokes shift for upconversion processes, anthracene derivates are of particular interest due to their higher triplet energies. Here, we demonstrate successful sensitization of the triplet state of 1-chloro-9,10-bis(phenylethynyl)anthracene using the established formamidinium methylammonium lead triiodide perovskite FA_0.85MA_0.15PbI₃, resulting in upconverted emission at 550 nm under 780 nm excitation. We draw a direct comparison to rubrene to unravel the underlying differences in the upconversion processes.

中文翻译：

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充电上转换：揭示红荧烯的替代品

迄今为止，固态钙钛矿敏化光子上转换的主要局限之一是，唯一成功与钙钛矿敏化剂配对的湮灭剂是红荧烯，这引发了这种三重态敏化方法是普遍存在还是范围有限的问题。此外，钙钛矿带隙和红荧烯三重态能量之间固有的能量不匹配限制了上转换过程中可实现的明显反斯托克斯位移。为了增加上转换过程的明显反斯托克斯位移，蒽衍生物因其较高的三线态能量而受到特别关注。在这里，我们展示了使用已建立的甲脒甲基铵三碘化铅钙钛矿 FA 对 1-氯-9,10-双（苯乙炔基）蒽的三重态的成功敏化_0.85 MA _0.15 PbI ₃，导致在 780 nm 激发下 550 nm 的上转换发射。我们与红荧烯进行了直接比较，以揭示上转换过程中的潜在差异。