0.5–4.5THz band terahertz spectroscopy of thermally activated delayed fluorescence molecules

Harunobu Takeda, Hiroaki Yoshioka, Hiroaki Minamide, Yuji Oki, Chihaya Aadachi

研究成果: ジャーナルへの寄稿学術誌査読

3 被引用数 (Scopus)


In this work we performed an expanded THz range spectroscopic analysis of organic electroluminescence chromophores; specifically the thermally activated delayed fluorescence (TADF) compounds 4,5-bis(carbazol-9-yl)-1,2-dicyanobenzene (2CzPN), 2,3,5,6-tetrakis(carbazol-9-yl)-1,4-dicyanobenzene (4CzTPN) and 1,2,3,5-tetrakis(carbazol-9-yl)-4,6-dicyanobenzene (4CzIPN) as amorphous powders. THz parametric oscillator, injection seeded THz parametric generator, THz time-domain and Fourier transform infrared spectroscopy techniques were all used to assess these compounds over the frequency ranges of 0.50–4.5 and 18–54THz. The resulting experimental spectra were compared with the results of density functional theory (DFT) calculations at the M06-2X/6-31G(d,p) level of theory. THz absorption bands in the experimental spectra were found to be very weak because of the lack of crystallinity in these specimens, even though the DFT calculations predicted absorbance in the THz range. Based on the DFT results, the absorbance lines that were observed are attributed to the wagging, rocking, rotational and out-of-plane bending motions of the carbazole moieties.

ジャーナルOptics Communications
出版ステータス出版済み - 12月 1 2020

!!!All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 原子分子物理学および光学
  • 物理化学および理論化学
  • 電子工学および電気工学


「0.5–4.5THz band terahertz spectroscopy of thermally activated delayed fluorescence molecules」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。