Institute of Photonics and Optoelectronics, Department of Electrical Engineering, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan.
Department of Energy and Refrigerating Air-Conditioning Engineering, Tungnan University, 152 Beishen Road, Section 3, New Taipei City 22202, Taiwan.
Molecules. 2022 Mar 17;27(6):1957. doi: 10.3390/molecules27061957.
In this paper, we first elaborate on the effects of surface plasmon (SP) coupling on the modulation responses of the emission of a light-emitting diode (LED) and its down-converted lights through colloidal quantum dots (QDs). The results of our past efforts for this subject are briefly discussed. The discussions lay the foundation for the presentation of the new experimental data of such down-converted lights in this paper. In particular, the enhancement of the modulation bandwidth (MB) of a QD-based converted light through SP coupling is demonstrated. By linking green-emitting QDs (GQDs) and/or red-emitting QDs (RQDs) with synthesized Ag nano-plates via surface modifications and placing them on a blue-emitting LED, the MBs of the converted green and red emissions are significantly increased through the induced SP coupling of the Ag nano-plates. When both GQD and RQD exist and are closely spaced in a sample, the energy transfer processes of emission-reabsorption and Förster resonance energy transfer from GQD into RQD occur, leading to the increase (decrease) in the MB of green (red) light. With SP coupling, the MB of a mixed light is significantly enhanced.
本文首先阐述了表面等离子体（SP）耦合对发光二极管（LED）及其下转换光发射调制响应的影响，通过胶体量子点（QD）。简要讨论了我们过去在这一课题上的努力。这些讨论为本文呈现新的下转换光实验数据奠定了基础。特别地，通过表面修饰将绿色发射量子点（GQDs）和/或红色发射量子点（RQDs）与合成的 Ag 纳米板连接，并将其放置在蓝色发射 LED 上，通过 Ag 纳米板的诱导 SP 耦合，显著提高了转换绿光和红光的调制带宽（MB）。当 GQD 和 RQD 存在且在样品中紧密间隔时，从 GQD 到 RQD 的发射再吸收和Förster 共振能量转移的能量转移过程发生，导致绿光（红光）MB 的增加（减少）。通过 SP 耦合，混合光的 MB 得到显著增强。
