Ultrafast Single‐Band Upconversion Luminescence in a Liquid‐Quenched Amorphous Matrix,Advanced Materials

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Ultrafast Single‐Band Upconversion Luminescence in a Liquid‐Quenched Amorphous Matrix
Advanced Materials ( IF 27.4 ) Pub Date : 2018-04-23 , DOI: 10.1002/adma.201800008
Byeong‐Seok Moon _{1,

2} , Hyoun‐Ee Kim _{2,

3} , Dong‐Hwan Kim ₁

Affiliation

Achieving single‐band upconversion is a challenging but rewarding approach to attain optimal performance in diverse applications, such as multiplexed molecular imaging, security coding, and nonlinear photonic devices. Here, highly efficient single‐band upconversion luminescence in the green spectral regime (16.4 times increase in emission at 525 nm) accomplished by realizing minimal energy loss from two‐photon upconversion in a newly synthesized liquid‐quenched amorphous matrix is reported. In contrast to previously reported single‐band upconversion, this phenomenon originates from the elevated transition probability of the host sensitive transition via changes in the host matrix's microstructure. The elevated transition probability facilitates ultrafast decay of upconversion luminescence with decay times as short as 0.2 µs, the fastest decay ever reported. The material in this study therefore has strong potential for use in photonic devices demanding high upconversion efficiency with a fast response time, which to date has been inaccessible using upconversion materials.

中文翻译：

液淬非晶态基质中的超快单波段上转换发光

实现单频带上变频是一种挑战性但有益的方法，可以在多种应用中获得最佳性能，例如多路复用分子成像，安全编码和非线性光子器件。在这里，报道了通过在新合成的液体猝灭的非晶态基质中实现双光子上转换的最小能量损失而实现的高效绿色光谱范围内的单波段上转换发光（在525 nm处发射增加了16.4倍）。与以前报道的单频带上变频相反，这种现象源自主机基质的微观结构发生变化，主机敏感过渡的跃迁几率增加。较高的跃迁几率有助于上转换发光的超快衰减，衰减时间短至0.2 µs，有史以来最快的衰变。因此，本研究中的材料具有极强的潜力，可用于要求高上转换效率和快速响应时间的光子器件中，迄今为止，使用上转换材料尚无法获得这种材料。

更新日期：2018-04-23

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