Xiao Hua, Wang Rui, Gui He, Lv Zhijian, Liu Zhaojun, Wang Kai
Opt Lett. 2020 Mar 15;45(6):1297-1300. doi: 10.1364/OL.386175.
We realize signal transmission with a miniature light source fabricated by a $4; {\rm mm}^2 $4mm red-emissive CdSe/ZnS quantum-dot light-emitting diode (QLED) in visible light communication (VLC). The light emitted from the 60°-designed QLED transmits in free space with a data rate of 4 Mb/s at a 3 m transmission distance by using a simple modulation scheme of non-return-to-zero on-off keying. The maximum data rate of 2.5 Mb/s with a bit error rate below the forward-error-correction (FEC) limit is achieved with the optical angles of ${\rm \pm 20}^\circ $±20. The influences caused by the voltage, distance, and optical angle of emitting light are taken into consideration during communication. The performance of the QLED-based light source compares favorably with other solution-processed devices in efficiency, luminance, bandwidth, transmission speed, and distance. Additionally, to the best of our knowledge, this is the first report of an investigation on the application of QLED in VLC. Our results should be instructive for further investigation on QLED communication.
我们通过一个由面积为4平方毫米的红色发光CdSe/ZnS量子点发光二极管（QLED）制成的微型光源在可见光通信（VLC）中实现了信号传输。通过使用简单的非归零开关键控调制方案，从60°设计的QLED发出的光在3米的传输距离上以4 Mb/s的数据速率在自由空间中传输。在±20°的光学角度下，实现了2.5 Mb/s的最大数据速率，且误码率低于前向纠错（FEC）极限。在通信过程中考虑了发光电压、距离和光学角度所造成的影响。基于QLED的光源在效率、亮度、带宽、传输速度和距离方面的性能优于其他溶液处理的器件。此外，据我们所知，这是关于QLED在VLC中的应用研究的首次报道。我们的结果对于进一步研究QLED通信应具有指导意义。
