Color-Tunable Resonant Photoluminescence and Cavity-Mediated Multistep Energy Transfer Cascade
Color-Tunable Resonant Photoluminescence and Cavity-Mediated Multistep Energy Transfer Cascade
复制标题
DOI：
10.1021/acsnano.6b03188
复制
发表时间：
2016-07-01
期刊：
影响因子：
17.1
通讯作者：
Yamamoto, Yohei
中科院分区：
文献类型：
--
作者：
Okada, Daichi;Nakamura, Takashi;Yamamoto, Yohei
利用多晶型荧光染料硼二吡咯（BODIPY）1掺杂聚苯乙烯微球，获得了颜色可调的共振光致发光（PL）。共振光致发光的颜色取决于1在微球中的组装形态，在微球的制备过程中，可以通过1的初始浓度选择性地控制微球从绿色到红色的发光。利用微操作技术制备了多耦合微球，研究了微球的层间光致发光传输，发现微球中存在多步光子传输，伴随着能量传递级联和光致发光颜色的逐步变化。层间能量传递级联是方向选择性的，其中仅允许能量供体到受体的下转换方向。这种腔介导的长距离和多步能量转移将有利于聚合物光子器件的应用。
Color-tunable resonant photoluminescence (PL) was attained from polystyrene microspheres doped with a single polymorphic fluorescent dye, boron-dipyrrin (BODIPY) 1. The color of the resonant PL depends on the assembling morphology of 1 in the microspheres, which can be selectively controlled from green to red by the initial concentration of 1 in the preparation process of the microspheres. Studies on intersphere PL propagation with multicoupled microspheres, prepared by micromanipulation technique, revealed that multistep photon transfer takes place through the microspheres, accompanying energy transfer cascade with stepwise PL color change. The intersphere energy transfer cascade is direction selective, where energy donor-to-acceptor down conversion direction is only allowed. Such cavity-mediated long-distance and multistep energy transfer will be advantageous for polymer photonics device application.