Thermally activated processes in an organic long-persistent luminescence system

Kazuya Jinnai, Naohiro Nishimura, Chihaya Adachi, Ryota Kabe

Research output: Contribution to journalArticlepeer-review

Abstract

Glow-in-the-dark materials can store absorbed photon energy and emit light for long periods of time. While inorganic long-persistent luminescence (LPL) materials are crystalline and often require rare metals, organic LPL (OLPL) materials are flexible and require no rare metals. The emission process of OLPL systems consists of photoinduced charge separation, charge accumulation, and emission from charge recombination. Although emission processes of OLPL systems have been investigated, the charge separation and accumulation processes remain enigmatic. In this study, we investigated the charge carrier dynamics of a binary OLPL system comprising of electron donors and acceptors. We confirmed the presence of thermal activation processes, thermally activated delayed fluorescence and thermoluminescence in the OLPL system.

Original languageEnglish
Pages (from-to)8412-8417
Number of pages6
JournalNanoscale
Volume13
Issue number18
DOIs
Publication statusPublished - May 14 2021

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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