Phenanthridine based Ir(III) complex for blue phosphorescent organic light-emitting diodes with long-term operational stability

Myeongbee Kim; In-Sook Han Lee; Jun-Yeob Lee; Si Hyun Han; Ki-Min Park; Youngjin Kang

Journal of Industrial and Engineering Chemistry, Vol.58, 386-390, February, 2018

DOI10.1016/j.jiec.2017.09.052 Export Citation

Phenanthridine based Ir(III) complex for blue phosphorescent organic light-emitting diodes with long-term operational stability

Myeongbee Kim, In-Sook Han Lee, Jun-Yeob Lee¹, Si Hyun Han¹, Ki-Min Park^{2, †}, and Youngjin Kang^†

Division of Science Education, Kangwon National University, Chuncheon 24341, Republic of Korea
¹School of Chemical Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea
²Research Institute of Natural Science, Gyeongsang National University, Jinju 52828, Republic of Korea

E-mail:,

New Ir(III) compound with sky-blue phosphorescence has been synthesized by one-pot reaction of [Ir(COD)2]BF4 with 2,3-dimethylimidazo[1,2-f]phenanthridine. This complex has a facial(fac) geometry around iridium metal center. The ligand has been found to significantly interact with adjacent molecules through π-stacking interactions in solid state packing. The Ir(III) complex emits brightly sky blue phosphorescence with λmax = 468 nm and quantum efficiencies of 0.23 in solution. Multi-layer electroluminescent devices using this complex as a dopant, and 1,3-bis(N-carbazolyl)benzene as the host/hole transporting layer, have been fabricated. The electroluminescence device at the doping level of 3-10 wt% has the excellent performance with external quantum efficiency of 15%-20% at the brightness of 10 cd/m2-1000 cd/m2 and the maximum power efficiency of 35.9 lm/W.

Keywords:Phenanthridine ligand;Crystal structure;Blue phosphorescent;Organic light-emitting diodes

[References]

Song W, Lee JY, Adv. Opt. Mater, 5, 160090 (2017)
Song W, Kim T, Lee Y, Lee JY, Org. Electron., 43, 82 (2017)
Lee CW, Kim OY, Lee JY, J. Ind. Eng. Chem., 4, 1198 (2014)
Herrera GJ, Whitten JE, Synth. Met., 128, 317 (2002)
Lin N, Qiao J, Duan L, Wang LD, Qiu Y, J. Phys. Chem., 118, 7569 (2014)
Schmidbauer S, Hohenleutner A, Konig B, Adv. Mater., 25(15), 2114 (2013)
So F, Kondakov D, Adv. Mater., 22(34), 3762 (2010)
Kondakov DY, J. Appl. Phys., 104, 084520 (2008)
Kim JH, Chen Y, Liu R, So F, Org. Electron., 15, 2381 (2014)
Baldo MA, Adachi C, Forrest SR, Phys. Rev. B, 62, 10967 (2000)
Giebink NC, D’Andrade BW, Weaver MS, Mackenzie PB, Brown JJ, Thompson ME, Forrest SR, J. Appl. Phys., 103, 044509 (2008)
Xiang CY, Fu X, Wei W, Liu R, Zhang Y, Balema V, Nelson B, So F, Adv. Funct. Mater., 26(9), 1463 (2016)
Wang Q, Oswald IWH, Perez MR, Jia HP, Gnade BE, Omary MA, Adv. Funct. Mater., 23, 5420 (2013)
Zhang YF, Lee J, Forrest SR, Nat. Commun., 5, 5008 (2014)
Lee C, Kim J, Choi JM, Lee JY, Kang Y, Dyes Pigment., 137, 378 (2017)
Cho H, Lee J, Lee JI, Cho NS, Park JH, Lee JY, Kang Y, Org. Electron., 34, 91 (2016)
Schenk TG, Downs JM, Milne CRC, Mackenzie PB, Boucher H, Whelan J, Bosnich B, Inorg. Chem., 24, 2334 (1985)
Parenty A, Song YF, Richmond C, Cronin L, Org. Lett., 9, 2253 (2007)
SADABS, Empirical Absorption and Correction Software Ver 2.03, Bruker AXS Inc., Madison, WI, 1999.
APEX2, Data Collection and Processing Software Ver. 2009.1-0, Bruker AXS Inc., Madison, WI, 2008.
Sheldrick GM, Acta Crystallogr. Sect. A, 64, 112 (2008)
Brandenburg K, DIAMOND, Crystal Impact GbR, Bonn, Germany, 2010.
Holmes RJ, Forrest SR, Tung YJ, Kwong RC, Brown JJ, Garon S, Thompson ME, Appl. Phys. Lett., 82, 2422 (2003)

[1] Song W, Lee JY, Adv. Opt. Mater, 5, 160090 (2017)

[2] Song W, Kim T, Lee Y, Lee JY, Org. Electron., 43, 82 (2017)

[3] Lee CW, Kim OY, Lee JY, J. Ind. Eng. Chem., 4, 1198 (2014)

[4] Herrera GJ, Whitten JE, Synth. Met., 128, 317 (2002)

[5] Lin N, Qiao J, Duan L, Wang LD, Qiu Y, J. Phys. Chem., 118, 7569 (2014)

[6] Schmidbauer S, Hohenleutner A, Konig B, Adv. Mater., 25(15), 2114 (2013)

[7] So F, Kondakov D, Adv. Mater., 22(34), 3762 (2010)

[8] Kondakov DY, J. Appl. Phys., 104, 084520 (2008)

[9] Kim JH, Chen Y, Liu R, So F, Org. Electron., 15, 2381 (2014)

[10] Baldo MA, Adachi C, Forrest SR, Phys. Rev. B, 62, 10967 (2000)

[11] Giebink NC, D’Andrade BW, Weaver MS, Mackenzie PB, Brown JJ, Thompson ME, Forrest SR, J. Appl. Phys., 103, 044509 (2008)

[12] Xiang CY, Fu X, Wei W, Liu R, Zhang Y, Balema V, Nelson B, So F, Adv. Funct. Mater., 26(9), 1463 (2016)

[13] Wang Q, Oswald IWH, Perez MR, Jia HP, Gnade BE, Omary MA, Adv. Funct. Mater., 23, 5420 (2013)

[14] Zhang YF, Lee J, Forrest SR, Nat. Commun., 5, 5008 (2014)

[15] Lee C, Kim J, Choi JM, Lee JY, Kang Y, Dyes Pigment., 137, 378 (2017)

[16] Cho H, Lee J, Lee JI, Cho NS, Park JH, Lee JY, Kang Y, Org. Electron., 34, 91 (2016)

[17] Schenk TG, Downs JM, Milne CRC, Mackenzie PB, Boucher H, Whelan J, Bosnich B, Inorg. Chem., 24, 2334 (1985)

[18] Parenty A, Song YF, Richmond C, Cronin L, Org. Lett., 9, 2253 (2007)

[19] SADABS, Empirical Absorption and Correction Software Ver 2.03, Bruker AXS Inc., Madison, WI, 1999.

[20] APEX2, Data Collection and Processing Software Ver. 2009.1-0, Bruker AXS Inc., Madison, WI, 2008.

[21] Sheldrick GM, Acta Crystallogr. Sect. A, 64, 112 (2008)

[22] Brandenburg K, DIAMOND, Crystal Impact GbR, Bonn, Germany, 2010.

[23] Holmes RJ, Forrest SR, Tung YJ, Kwong RC, Brown JJ, Garon S, Thompson ME, Appl. Phys. Lett., 82, 2422 (2003)