TY - JOUR
T1 - Well-ordered films of disk-shaped thermally activated delayed fluorescence molecules
AU - Hasegawa, Yuri
AU - Minami, Hayato
AU - Kanada, Satoru
AU - Yamada, Yoichi
AU - Sasaki, Masahiro
AU - Hosokai, Takuya
AU - Nakanotani, Hajime
AU - Adachi, Chihaya
N1 - Funding Information:
This work was supported by JSPS KAKENHI Grant Numbers JP26286011, JP16K13678, and 15J05607. This work was performed under the approval of the Photon Factory Program Advisory Committee (Proposal No. 2016G539) and UVSOR (Proposal No. 29-259). The authors thank Professor Yutaka Wakayama and Mika Watanabe (National Institute of Material Science, Japan) for experimental support of XRD measurement.
Publisher Copyright:
© 2018 Society of Photo-Optical Instrumentation Engineers (SPIE).
PY - 2018/7/1
Y1 - 2018/7/1
N2 - We fabricated well-ordered, crystalline mono- And multilayers of disk-shaped thermally activated delayed fluorescence (TADF) molecules such as 4CzIPN, 2CzPN, and 5CzBN. The slow deposition of these molecules on flat substrates such as Ag(111) at room temperature resulted in the formation of well-ordered and homogeneous monolayers. Moreover, the multilayer of the 4CzIPN was also found to be well-ordered and flat when deposited on highly oriented pyrolytic graphite (HOPG). The electronic states of the crystalline monolayer and multilayer of 4CzIPN were found to be nearly the same, suggesting that the electronic states of both layers are not altered significantly by adsorption on substrates. Indeed, we also confirmed the delayed fluorescence from the crystalline multilayer of 4CzIPN on the HOPG substrate even in an ambient condition. These results show promising applications of crystalline films of disk-shaped TADF-molecules such as 4CzIPN for organic light-emitting diodes devices with high outcoupling efficiency.
AB - We fabricated well-ordered, crystalline mono- And multilayers of disk-shaped thermally activated delayed fluorescence (TADF) molecules such as 4CzIPN, 2CzPN, and 5CzBN. The slow deposition of these molecules on flat substrates such as Ag(111) at room temperature resulted in the formation of well-ordered and homogeneous monolayers. Moreover, the multilayer of the 4CzIPN was also found to be well-ordered and flat when deposited on highly oriented pyrolytic graphite (HOPG). The electronic states of the crystalline monolayer and multilayer of 4CzIPN were found to be nearly the same, suggesting that the electronic states of both layers are not altered significantly by adsorption on substrates. Indeed, we also confirmed the delayed fluorescence from the crystalline multilayer of 4CzIPN on the HOPG substrate even in an ambient condition. These results show promising applications of crystalline films of disk-shaped TADF-molecules such as 4CzIPN for organic light-emitting diodes devices with high outcoupling efficiency.
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U2 - 10.1117/1.JPE.8.032110
DO - 10.1117/1.JPE.8.032110
M3 - Article
AN - SCOPUS:85044094869
SN - 1947-7988
VL - 8
JO - Journal of Photonics for Energy
JF - Journal of Photonics for Energy
IS - 3
M1 - 032110
ER -
