Colloidal PbS quantum dots for visible-to-near-infrared optical-internet-of-things

Aigerim Tankimanova, Chun Hong Kang, Omar Alkhazragi, Haodong Tang, Meiwei Kong, Lutfan Sinatra, Marat Lutfullin, Depeng Li, Shihao Ding, Bing Xu, Osman Bakr, Kai Wang, Xiao Wei Sun, Tien Khee Ng, Boon S. Ooi

Research output: Contribution to journalArticlepeer-review

Abstract

The emergence of optical-internet-of-things (Optical-IoT) for sixth-generation (6G) network has been envisaged to relieve the bandwidth congestion in the conventional radio frequency (RF) channel, and to support the ever-increasing number of smart devices. Among the plethora of device-innovation deemed essential for fortifying the development, herein we report on the visible-to-near-infrared color-conversion luminescent-dyes based on lead sulphide quantum dots (PbS QDs), so as to achieve an eye-safe high-speed optical link. The solution-processed PbS QDs exhibited strong absorption in the visible range, radiative recombination lifetime of 6.4 s, as well as high photoluminescence quantum yield of up to 88%. Our proof-of-principle demonstration based on an orthogonal frequency-division multiplexing (OFDM) modulation scheme established an infrared data transmission of 0.27 Mbit/s, readily supporting an indoor optical-IoT system, and shed light on the possibility for PbS-integrated transceivers in supporting remote access control of multiple nodes. We further envisaged that our investigations could find applications in future development of solution-processable PbS-integrated luminescent fibers, concentrators, and waveguides for high-speed optical receivers.
Original languageEnglish (US)
Pages (from-to)1-1
Number of pages1
JournalIEEE Photonics Journal
DOIs
StatePublished - 2021

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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