Phototriggered Depolymerization of Flexible Poly(phthalaldehyde) Substrates by Integrated Organic Light-Emitting Diodes

Kyung Min Lee, Oluwadamilola Phillips, Anthony Engler, Paul A. Kohl, Barry P. Rand

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

We demonstrate phototriggered depolymerization of a low ceiling temperature (Tc) polymer, poly(phthalaldehyde) (PPHA), via internal light emission from integrated organic light-emitting diodes (OLEDs) fabricated directly on flexible PPHA substrates with silver nanowire electrodes. The depolymerization of the PPHA substrates is triggered by absorption of the OLED emission by a sensitizer that activates a photoacid generator via energetically favorable electron transfer. We confirm with Fourier-transform infrared spectroscopy that the photon doses delivered by the integrated OLED are sufficient to depolymerize the PPHA substrates. We determine this critical dosage by measuring the operating lifetimes of the OLEDs whose failure is believed to be due to significant mechanical softening during the liquefaction of decomposed phthalaldehyde monomers.

Original languageEnglish (US)
Pages (from-to)28062-28068
Number of pages7
JournalACS Applied Materials and Interfaces
Volume10
Issue number33
DOIs
StatePublished - Aug 22 2018

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Keywords

  • low ceiling temperature polymer
  • organic light-emitting devices
  • transient electronics
  • transient polymer

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