Insights into enhanced electrochemiluminescence of a multiresonance thermally activated delayed fluorescence molecule

Liuqing Yang, Lihui Dong, David Hall, Mahdi Hesari, Yoann Olivier*, Eli Zysman-Colman*, Zhifeng Ding*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)
17 Downloads (Pure)

Abstract

The electrochemiluminescence (ECL) behavior of a multiresonance thermally activated delayed fluorescence molecule has been investigated for the first time by means of ECL-voltage curves, newly designed ECL-time observatory, and ECL spectroscopy. The compound, Mes3DiKTa, shows complex ECL behavior, including a delayed onset time of 5 ms for ECL generation in both the annihilation pathway and the coreactant route, which we attribute to organic long-persistent ECL (OLECL). Triplet-triplet annihilation, thermally activated delayed fluorescence and uncompensated solution resistance cannot be ruled out as contributing mechanisms to the ECL. A very long ECL emission decay was attributed to OLECL as well. The absolute ECL efficiencies of Mes3DiKTa were enhanced and reached 0.0013% in annihilation route and 1.1% for the coreactant system, which are superior to those of most other organic ECL materials. It is plausible that ECL materials with comparable behavior as Mes3DiKTa are desirable in applications such as ECL sensing, imaging, and light-emitting devices.
Original languageEnglish
Number of pages14
JournalSmartMat
VolumeEarly View
Early online date14 Sept 2022
DOIs
Publication statusE-pub ahead of print - 14 Sept 2022

Keywords

  • Electrochemiluminescence
  • Multiresonant thermally activated delayed fluorescence
  • Organic long-persistent electrochemiluminescence
  • Triplet-triplet annihilation

Fingerprint

Dive into the research topics of 'Insights into enhanced electrochemiluminescence of a multiresonance thermally activated delayed fluorescence molecule'. Together they form a unique fingerprint.

Cite this