Improving the modulation bandwidth of LED by CdSe/ZnS quantum dots for visible light communication

• DOI: 10.1364/oe.24.021577
• Publication Date: 2016-09-08T15:06:15Z
• Authors: Xiangtian Xiao; Haodong Tang; Tianqi Zhang; Wei Chen; Wanli Chen; Dan Wu; Rui Wang; Kai Wang
• Keywords: Modulation (music); Visible spectrum

Visible light communication (VLC) is an advanced and high-efficiency wireless technology. As one of the most important sources in VLC, conventional white emitting diode (WLED) based on Y3Al5O12:Ce3+ (YAG:Ce) phosphor limits system transmitting rate severely due to its narrow modulation bandwidth. Considering short fluorescent lifetime quantum dots (QDs), QD-LEDs with wide bandwidths were designed here improve VLC. CdSe/ZnS core/shell QDs related luminescent microspheres (LMS) implemented as conversion materials for QD-LEDs. Compared WLED, proposed QD-LED QD-WLED reached maximum improvement bandwidth at 74.19% 67.75% respectively. Furthermore, mathematical modeling smearing was analyzed establish relationship between Our findings will provide effective solution LEDs high speed