State Key Laboratory of Integrated Optoelectronics and College of Electronic Science and Engineering, Jilin University, Changchun 130012, People's Republic of China.
Nanotechnology. 2018 Nov 9;29(45):455708. doi: 10.1088/1361-6528/aaddc0. Epub 2018 Aug 30.
The bandwidth of white light emitting diodes (WLEDs) is an important factor that affects most of the system performances in visible light communication (VLC). It is mainly limited by the down-conversion phosphors. We propose in this paper to employ nanomaterial phosphors with short fluorescence lifetime and high quantum yield in VLC. The white-emitting device of bandwidth-based lifetime was fabricated by using several kinds of nanophosphors with different fluorescence lifetimes. Moreover, we proposed two theoretical models to analyze the factors that affect bandwidth. Compared with the commercial YAG-based WLEDs, the bandwidth of nanophosphor-based WLEDs can be improved over three times and close to the blue excitation sources. Our study indicates that nanophosphors can become promising fluorescent materials in VLC, and provides a new direction for developing wide-bandwidth VLC systems.
白光发光二极管（WLED）的带宽是影响可见光通信（VLC）中大多数系统性能的一个重要因素。它主要受下转换荧光粉的限制。在本文中，我们提出在 VLC 中使用荧光寿命短和量子产率高的纳米材料荧光粉。通过使用几种具有不同荧光寿命的纳米荧光粉，制作了基于带宽的荧光寿命的白色发光器件。此外，我们提出了两个理论模型来分析影响带宽的因素。与基于商用 YAG 的 WLED 相比，纳米荧光粉基 WLED 的带宽可以提高三倍以上，并且接近蓝色激发源。我们的研究表明，纳米荧光粉可以成为 VLC 中很有前途的荧光材料，为开发宽带 VLC 系统提供了新的方向。
