The Importance of Excited-State Energy Alignment for Efficient Exciplex Systems Based on a Study of Phenylpyridinato Boron Derivatives

Masashi Mamada, Guojian Tian, Hajime Nakanotani, Jianhua Su, Chihaya Adachi

研究成果: ジャーナルへの寄稿学術誌査読

75 被引用数 (Scopus)

抄録

Understanding excited-state dynamics is critical for improving the photoluminescence (PL) efficiency of exciplexes. A series of exciplexes based on conventional hole-transporting materials as donor and newly developed phenylpyridinato boron derivatives as acceptor were investigated. High PL efficiencies were achieved in only some combinations, and a large difference in performance among combinations provided insight into nonradiative processes in exciplex systems. Furthermore, the triplet local excited states (3LE) of each donor and acceptor were found play an important role in triplet exciplex harvesting. Significant contributions from triplets were clearly observed when the charge-transfer excited states (1CT and 3CT) and 3LE were ideally aligned. We also demonstrated fine control of relative energy alignment via the concentration to improve the PL efficiency.

本文言語英語
ページ(範囲)12380-12384
ページ数5
ジャーナルAngewandte Chemie - International Edition
57
38
DOI
出版ステータス出版済み - 9月 17 2018

!!!All Science Journal Classification (ASJC) codes

  • 触媒
  • 化学一般

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