High-color rendering index white organic light-emitting diodes based on exciplex forming blue emitters

Si Hyun Han; Jeong Min Choi; Jun Yeob Lee

Journal of Industrial and Engineering Chemistry, Vol.46, 49-53, February, 2017

DOI10.1016/j.jiec.2016.10.014 Export Citation

High-color rendering index white organic light-emitting diodes based on exciplex forming blue emitters

Si Hyun Han, Jeong Min Choi, and Jun Yeob Lee^†

School of Chemical Engineering, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon-si, Gyeonggi-do 16419, Republic of Korea

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A novel emitting layer structure of white organic light-emitting diodes (WOLED) was developed using exciplex-forming two blue emitters, 2,3,4,5,6-penta(9H-carbazol-9-yl)benzonitrile (5CzCN) and tris(2-(1-(2,4-diisopropyldibenzo[b,d]furan-3-yl)-1H-imidazol-2-yl)phenyl)iridium (Ir(dbi)3). The 5CzCN blue delayed fluorescence material and Ir(dbi)3 phosphorescent emitter partially formed a red exciplex in the mixed film. Combination of blue emission from the blue emitters and red emission from the exciplex provided white emission in the blue emitting 5CzCN and Ir(dbi)3 co-doped device. The WOLED fabricated using the blue emitting 5CzCN and Ir(dbi)3 emitters achieved high color rendering index of 90.8 at 100 cd/m2.

Keywords:White device;Blue emitter;Exciplex;Delayed fluorescence;Phosphorescence

[References]

D'Andrade BW, Forrest SR, Adv. Mater., 16(18), 1585 (2004)
Sun Y, Forrest SR, J. Appl. Phys., 100, 073106 (2006)
Liu Y, Nishiura M, Wang Y, Hou ZM, J. Am. Chem. Soc., 128(17), 5592 (2006)
Kanno H, Sun Y, Forrest SR, Appl. Phys. Lett., 86, 263502 (2005)
Wang Q, Ding JQ, Ma DG, Cheng YX, Wang LX, Jing XB, Wang FS, Adv. Funct. Mater., 19(1), 84 (2009)
Ho CL, Wong WY, Wang Q, Ma DG, Wang LX, Lin ZY, Adv. Funct. Mater., 18(6), 928 (2008)
Sun Y, Forrest SR, Appl. Phys. Lett., 91, 263503 (2007)
Park YS, Kang JW, Kang DM, Park JW, Kim YH, Kwon SK, Kim JJ, Adv. Mater., 20(10), 1957 (2008)
Li JY, Liu D, Ma CW, Lengyel O, Lee CS, Tung CH, Lee S, Adv. Mater., 16(17), 1538 (2004)
Yu XM, Zhou GJ, Lam CS, Wong WY, Zhu XL, Sun JX, Wong M, Kwok HS, J. Organomet. Chem., 693, 1518 (2008)
Yu J, Yin Y, Liu W, Zhang W, Zhang L, Xie W, Zhao H, Org. Electron., 15, 2817 (2014)
Chang CH, Chen CC, Wu CC, Chang SY, Hung JY, Chi Y, Org. Electron., 11, 266 (2010)
Zhou G, Wong WY, Suo S, J. Photochem. Photobiol. C-Photochem. Rev., 11, 135 (2010)
Gather MC, Kohnen A, Meerholz K, Adv. Mater., 23, 235 (2011)
Farinola GM, Ragnia R, Chem. Soc. Rev., 40, 3468 (2011)
D'Andrade BW, Thompson ME, Forrest SR, Adv. Mater., 14(2), 147 (2002)
D'Andrade BW, Holmes RJ, Forrest SR, Adv. Mater., 16(7), 624 (2004)
Adamovich V, Brooks J, Tamayo A, Alexander AM, Djurovich PI, Thompson ME, Adachi C, D’Andrade BW, Forrest SR, New J. Chem., 26, 1171 (2002)
D’Andrade BW, Forrest SR, Adv. Mater., 16, 1590 (2004)
Hung W, Fang G, Lin S, Cheng S, Wong K, Kuo T, Chou P, Sci. Rep., 4, 5161 (2014)
Cho YJ, Jeon SK, Lee JY, Adv. Opt. Mater., 4, 690 (2016)
Zhuang J, Li W, Su W, Liu Y, Shen Q, Liao L, Zhou M, Org. Electron., 14, 2596 (2013)
Jeon SK, Lee JY, J. Ind. Eng. Chem., 32, 332 (2015)
Yoo SG, Jeon SK, Hwang SH, Lee JY, J. Ind. Eng. Chem., 32, 72 (2015)
Cho YJ, Lee JY, J. Infect. Dis., 16, 105 (2015)
Lee JY, J. Infect. Dis., 15, 139 (2014)

[Referenced By]

[1] D'Andrade BW, Forrest SR, Adv. Mater., 16(18), 1585 (2004)

[2] Sun Y, Forrest SR, J. Appl. Phys., 100, 073106 (2006)

[3] Liu Y, Nishiura M, Wang Y, Hou ZM, J. Am. Chem. Soc., 128(17), 5592 (2006)

[4] Kanno H, Sun Y, Forrest SR, Appl. Phys. Lett., 86, 263502 (2005)

[5] Wang Q, Ding JQ, Ma DG, Cheng YX, Wang LX, Jing XB, Wang FS, Adv. Funct. Mater., 19(1), 84 (2009)

[6] Ho CL, Wong WY, Wang Q, Ma DG, Wang LX, Lin ZY, Adv. Funct. Mater., 18(6), 928 (2008)

[7] Sun Y, Forrest SR, Appl. Phys. Lett., 91, 263503 (2007)

[8] Park YS, Kang JW, Kang DM, Park JW, Kim YH, Kwon SK, Kim JJ, Adv. Mater., 20(10), 1957 (2008)

[9] Li JY, Liu D, Ma CW, Lengyel O, Lee CS, Tung CH, Lee S, Adv. Mater., 16(17), 1538 (2004)

[10] Yu XM, Zhou GJ, Lam CS, Wong WY, Zhu XL, Sun JX, Wong M, Kwok HS, J. Organomet. Chem., 693, 1518 (2008)

[11] Yu J, Yin Y, Liu W, Zhang W, Zhang L, Xie W, Zhao H, Org. Electron., 15, 2817 (2014)

[12] Chang CH, Chen CC, Wu CC, Chang SY, Hung JY, Chi Y, Org. Electron., 11, 266 (2010)

[13] Zhou G, Wong WY, Suo S, J. Photochem. Photobiol. C-Photochem. Rev., 11, 135 (2010)

[14] Gather MC, Kohnen A, Meerholz K, Adv. Mater., 23, 235 (2011)

[15] Farinola GM, Ragnia R, Chem. Soc. Rev., 40, 3468 (2011)

[16] D'Andrade BW, Thompson ME, Forrest SR, Adv. Mater., 14(2), 147 (2002)

[17] D'Andrade BW, Holmes RJ, Forrest SR, Adv. Mater., 16(7), 624 (2004)

[18] Adamovich V, Brooks J, Tamayo A, Alexander AM, Djurovich PI, Thompson ME, Adachi C, D’Andrade BW, Forrest SR, New J. Chem., 26, 1171 (2002)

[19] D’Andrade BW, Forrest SR, Adv. Mater., 16, 1590 (2004)

[20] Hung W, Fang G, Lin S, Cheng S, Wong K, Kuo T, Chou P, Sci. Rep., 4, 5161 (2014)

[21] Cho YJ, Jeon SK, Lee JY, Adv. Opt. Mater., 4, 690 (2016)

[22] Zhuang J, Li W, Su W, Liu Y, Shen Q, Liao L, Zhou M, Org. Electron., 14, 2596 (2013)

[23] Jeon SK, Lee JY, J. Ind. Eng. Chem., 32, 332 (2015)

[24] Yoo SG, Jeon SK, Hwang SH, Lee JY, J. Ind. Eng. Chem., 32, 72 (2015)

[25] Cho YJ, Lee JY, J. Infect. Dis., 16, 105 (2015)

[26] Lee JY, J. Infect. Dis., 15, 139 (2014)