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Proceedings Paper

New ultra deep blue emitters based on chrysene chromophores
Author(s): Hwangyu Shin; Seokwoo Kang; Hyocheol Jung; Hayoon Lee; Jaehyun Lee; Beomjin Kim; Jongwook Park
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Paper Abstract

Chrysene, which has a wide band gap, was selected as an emission core to develop and study new materials that emit ultra-deep-blue light with high efficiency. Six compounds introducing various side groups were designed and synthesized: 6, 12-bis(30,50-diphenylphenyl)chrysene (TP-C-TP), 6-(30,50-diphenylphenyl)-12-(3,5-diphenylbiphenyl-400-yl)chrysene (TP-C-TPB) and 6,12-bis(300,500-diphenylbiphenyl-40-yl)chrysene (TPB-C-TPB), which contained bulky aromatic si de groups; and N,N,N0 ,N0-tetraphenyl-chrysene-6,12-diamine (DPA-C-DPA), [12-(4-diphenylamino-phenyl)-chrysene-6-yl]-diphenylamine(DPA-C-TPA) and 6,12-bis[4-(diphenylamino)phenyl]chrysene (TPA-C-TPA), which contained aromatic amine groups, were designed to afford improved hole injection properties. The synthesized materials showed maxi mum absorption wavelengths at 342–402 nm in the film state and exhibited deep-blue photoluminescence (PL) emission s at 417–464 nm. The use of TP-C-TPB in a non-doped organic light emitting diode (OLED) device resulted in ultra-deep-blue emission with an external quantum efficiency (EQE) of 4.02% and Commission Internationale de L’Eclairage coo rdinates (CIE x, y) of (0.154, 0.042) through effective control of the internal conjugation length and suppression of the p –p* stacking. The use of TPA-C-TPA, which includes an aromatic amine side group, afforded an excellent EQE of 4.83 % and excellent color coordinates CIE x, y of (0.147, 0.077).

Paper Details

Date Published: 23 September 2016
PDF: 9 pages
Proc. SPIE 9941, Organic Light Emitting Materials and Devices XX, 99410K (23 September 2016); doi: 10.1117/12.2236813
Show Author Affiliations
Hwangyu Shin, The Catholic Univ. of Korea (Korea, Republic of)
Seokwoo Kang, The Catholic Univ. of Korea (Korea, Republic of)
Hyocheol Jung, The Catholic Univ. of Korea (Korea, Republic of)
Hayoon Lee, The Catholic Univ. of Korea (Korea, Republic of)
Jaehyun Lee, The Catholic Univ. of Korea (Korea, Republic of)
Beomjin Kim, Korea Research Institute of Chemical Technology (Korea, Republic of)
Jongwook Park, The Catholic Univ. of Korea (Korea, Republic of)

Published in SPIE Proceedings Vol. 9941:
Organic Light Emitting Materials and Devices XX
Franky So; Chihaya Adachi; Jang-Joo Kim, Editor(s)

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