Revealing the Excited-state Dynamics of Thermally Activated Delayed Fluorescence Molecules by using Transient Absorption Npectroscopy

Takuya Hosokai, Hiroyuki Matsuzaki, Akihiro Furube, Katsumi Tokumaru, Tetsuo Tsutsui, Hajime Nakanotani, Masayuki Yahiro, Chihaya Adachi

Research output: Contribution to journalConference articlepeer-review

7 Citations (Scopus)

Abstract

Excited state dynamics is a central issue in discussing the origin of the high efficiency of thermally activated delayed fluorescence (TADF) molecules. Here we will present experimentally a complexity of the excited state dynamics of the extremely high efficient TADF molecules, 4CzIPN. By means of pump-probe transient absorption spectroscopy, we will show the sign of intramolecular charge delocalization formed in the excited state. This specific excited state originates from the intramolecular charge resonance within carbazole moieties, which occurs through the dimerization of the moieties. On the other hand, the counter molecules of 4CzIPN, i.e. 2CzPN, forms only a localized excited state. The role of charge delocalized state for TADF efficiency will be discussed.

Original languageEnglish
Pages (from-to)786-789
Number of pages4
JournalDigest of Technical Papers - SID International Symposium
Volume47
Issue number1
DOIs
Publication statusPublished - 2016
Event54th Annual SID Symposium, Seminar, and Exhibition 2016, Display Week 2016 - San Francisco, United States
Duration: May 22 2016May 27 2016

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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