Advanced Nonvolatile Organic Optical Memory Using Self-Assembled Monolayers of Porphyrin-Fullerene Dyads

Lyubov A. Frolova, Yulia Furmansky, Alexander F. Shestakov, Nikita A. Emelianov, Paul A. Liddell, Devens Gust, Iris Visoly-Fisher, Pavel A. Troshin

Research output: Contribution to journalArticlepeer-review

Abstract

Photo-switchable organic field-effect transistors (OFETs) represent an important platform for designing memory devices for a diverse array of products including security (brand-protection, copy-protection, keyless entry, etc.), credit cards, tickets, and multiple wearable organic electronics applications. Herein, we present a new concept by introducing self-assembled monolayers of donor-acceptor porphyrin-fullerene dyads as light-responsive triggers modulating the electrical characteristics of OFETs and thus pave the way to the development of advanced nonvolatile optical memory. The devices demonstrated wide memory windows, high programming speeds, and long retention times. Furthermore, we show a remarkable effect of the orientation of the fullerene-polymer dyads at the dielectric/semiconductor interface on the device behavior. In particular, the dyads anchored to the dielectric by the porphyrin part induced a reversible photoelectrical switching of OFETs, which is characteristic of flash memory elements. On the contrary, the devices utilizing the dyad anchored by the fullerene moiety demonstrated irreversible switching, thus operating as read-only memory (ROM). A mechanism explaining this behavior is proposed using theoretical DFT calculations. The results suggest the possibility of revisiting hundreds of known donor-acceptor dyads designed previously for artificial photosynthesis or other purposes as versatile optical triggers in advanced OFET-based multibit memory devices for emerging electronic applications.

Original languageEnglish
Pages (from-to)15461-15467
Number of pages7
JournalACS applied materials & interfaces
Volume14
Issue number13
DOIs
StatePublished - 6 Apr 2022

Keywords

  • OFETs
  • optical memory
  • organic field-effect transistors
  • photoswitching
  • porphyrin-fullerene dyad
  • self-assembled monolayer

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