Organic photovoltaics for simultaneous energy harvesting and high-speed MIMO optical wireless communications

Iman Tavakkolnia, Lethy K. Jagadamma, Rui Bian, Pavlos P. Manousiadis, Stefan Videv, Graham A. Turnbull, Ifor D. W. Samuel, Harald Haas

Research output: Contribution to journalArticlepeer-review

Abstract

We show that organic photovoltaics (OPVs) are suitable for high-speed optical wireless data receivers that can also harvest power. In addition, these OPVs are of particular interest for indoor applications, as their bandgap is larger than that of silicon, leading to better matching of the spectrum of artificial light. By selecting a suitable combination of a narrow bandgap donor polymer and a nonfullerene acceptor, stable OPVs are fabricated with a power conversion efficiency of 8.8 % under 1 Sun and 14 % under indoor lighting conditions. In an optical wireless communication experiment, a data rate of 363 Mb/s and a simultaneous harvested power of 10.9 mW are achieved in a 4-by-4 multiple-input multiple-output (MIMO) setup that consists of 4 laser diodes each transmitting 56 mW optical power and 4 OPV cells on a single panel as receivers at a distance of 40 cm. This result is the highest reported data rate using OPVs as data receivers and energy harvesters. This finding may be relevant to future mobile communication applications because it enables enhanced wireless data communication performance while prolonging the battery life in a mobile device.
Original languageEnglish
Number of pages17
JournalLight: Science & Applications
Publication statusAccepted/In press - 14 Dec 2020

Keywords

  • optical wireless communication
  • light fidelity (LiFi)
  • organic photovoltaics
  • MIMO

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