Benzoylphenyltriazine as a new acceptor of donor.acceptor type thermally-activated delayed-fluorescent emitters

Ju Hui Yun; Kyung Hyung Lee; Jun Yeob Lee

Journal of Industrial and Engineering Chemistry, Vol.102, 226-232, October, 2021

DOI10.1016/j.jiec.2021.07.011 Export Citation

Benzoylphenyltriazine as a new acceptor of donor.acceptor type thermally-activated delayed-fluorescent emitters

Ju Hui Yun, Kyung Hyung Lee, and Jun Yeob Lee^†

School of Chemical Engineering, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon-si, Gyeonggi-do 440-746, South Korea

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A new acceptor, benzoylphenyltriazine, was explored as a strong acceptor of thermally-activated delayed-fluorescent (TADF) emitters because of its high external quantum efficiency. The benzoylphenyltriazine acceptor was designed to have strong acceptor strength by modifying a well-known phenyltriazine acceptor with a weak electron-withdrawing benzoyl unit. The extra benzoyl unit strengthened the electron-accepting strength of the phenyltriazine acceptor, which improved the light emission performances of the TADF emitters. A BTrztCz molecule is a derivative of the benzoylphenyltriazine acceptor and was studied as a TADF emitter. The comparison of the BTrztCz emitter with a TrztCz emitter, derived from phenyltriazine based on the same donor, showed that benzoylphenyltriazine acceptor is superior to phenyltriazine for delayed-fluorescence characteristics. The quantum efficiency of the BTrztCz (21.4%) device is greater than that of the TrztCz (20.6%) device.

Keywords:Acceptor;Delayed fluorescence;Benzoylphenyltriazine;Organic light-emitting diodes;Efficiency

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[2] Zhang Q, Li B, Huang S, Nomura H, Tanaka H, Adachi C, Nat. Photon., 8, 326 (2014)

[3] Zhang D, Cai M, Zhang Y, Zhang D, Duan L, Mater. Horiz., 3, 145 (2016)

[4] Byeon SY, Lee DR, Yook KS, Lee JY, Adv. Mater., 31, 180371 (2019)

[5] Komatsu R, Sasabe H, Seino Y, Nakao K, Kido J, J. Mater. Chem. C, 4, 2274 (2016)

[6] Hirata S, Sakai Y, Masui K, Tanaka H, Lee SY, Nomura H, Nakamura N, Yasumatsu M, Nakanotani H, Zhang QS, Shizu K, Miyazaki H, Adachi C, Nat. Mater., 14(3), 330 (2015)

[7] Jeon SK, Lee HL, Yook KS, Lee JY, Adv. Mater., 31, 180352 (2019)

[8] Lee SY, Adachi C, Yasuda T, Adv. Mater., 28(23), 4626 (2016)

[9] Chen JX, Wang K, Zheng CJ, Zhang M, Shi YZ, Tao SL, Lin H, Liu W, Tao WW, Ou XM, Zhang XH, Adv. Sci., 5, 180043 (2018)

[10] Cho YJ, Yook KS, Lee JY, Adv. Mater., 26, 6642 (2015)

[11] Zeng W, Lai HY, Lee WK, Jiao M, Shiu YJ, Zhong C, Gong S, Zhou T, Xie G, Sarma M, Wong KT, Wu CC, Yang C, Adv. Mater., 30, 170496 (2018)

[12] Zhou D, Ryoo CH, Liu D, Wang S, Qian G, Zheng Y, Park SY, Zhu W, Wang Y, Adv. Opt. Mater., 8, 190102 (2020)

[13] Zhou D, Liu D, Gong X, Ma H, Qian G, Gong S, Xie G, Zhu W, Wang Y, A.C.S. Appl, Mater. Interfaces, 11, 24339 (2019)

[14] Hatakeyama T, Shiren K, Nakajima K, Nomura S, Nakatsuka S, Kinoshita K, Ni JP, Ono Y, Ikuta T, Adv. Mater., 28(14), 2777 (2016)

[15] Kim JH, Yun JH, Lee JY, Adv. Opt. Mater., 6, 180025 (2018)

[16] Cho YJ, Yook KS, Lee JY, Adv. Mater., 26(24), 4050 (2014)

[17] Uoyama H, Goushi K, Shizu K, Nomura H, Adachi C, Nature, 492(7428), 234 (2012)

[18] Lee DR, Kim M, Jeon SK, Hwang SH, Lee CW, Lee JY, Adv. Mater., 27(39), 5861 (2015)

[19] Kang H, Jeon SO, Chung YS, Sim M, Kim JS, Kim J, Lee H, Ihn SG, Kim S, Hong J, Org. Electron., 75 (2019)

[20] Moon YK, Jang HJ, Hwang S, Kang S, Kim S, Oh J, Lee S, Kim D, Lee JY, You Y, Adv. Mater., 36, 200383 (2021)

[21] Cha JR, Lee CW, Lee JY, Gong MS, Dyes Pigment., 134, 562 (2016)

[22] Jung M, Lee JY, J. Inf. Disp., 21, 11 (2020)

[23] Masui K, Nakanotani H, Adachi C, Org. Electron., 14, 2721 (2013)