Optimizing blue iridium complex and orange-red osmium complex doping concentrations to improve phosphorescent white organic light emitting diodes

Teh-Chao Liao; Hsueh-Tao Chou; Fuh-Shyang Juang; Yu-Sheng Tsai; Shun-Hsi Wang; Vuhoang Tuan; Yun Chi

doi:10.1016/j.cap.2011.02.029

Optimizing blue iridium complex and orange-red osmium complex doping concentrations to improve phosphorescent white organic light emitting diodes

Teh-Chao Liao^*, Hsueh-Tao Chou, Fuh-Shyang Juang, Yu-Sheng Tsai, Shun-Hsi Wang, Vuhoang Tuan, Yun Chi

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

6 Citations (Scopus)

Abstract

The effect of the phosphor doping concentration on the optoelectronic characteristics of white phosphorescence organic light emitting diodes (PHOLEDs) was studied. A high efficiency white PHOLED was achieved using the unique efficiency properties of the red-emitting Osmium complex ([fptz = 3-trifluoromethyl-5-(2-pyridyl)-1,2,4-triazole, PPh2Me = phosphineligand]; Os(fptz)₂(PPh₂Me)₂) combined with a well known efficient blue-emitting Iridium complex (bis[(4,6-difluorophenyl)-pyridinate-N, C2′; FIrpic]). The results demonstrate that with 2 wt% Os(fptz)₂(PPh₂Me)₂ co-doped into the blue-emitting layer (10 wt% FIrpic doped into the host), the device can achieve a luminance efficiency of up to 40.4 cd/A (25.6 lm/W) with a good corresponding CIE coordinate (0.39, 0.40). The doping concentrations of the red-emitting and blue-emitting phosphors were adjusted to obtain a pure white light with a CIE coordinate of (0.368, 0.366). A high efficiency white PHOLED was achieved by optimizing the doping concentration of the red-emitting and blue-emitting complexes.

Original language	English
Pages (from-to)	S175-S178
Journal	Current Applied Physics
Volume	11
Issue number	4, Suppl.
Online published	14 Jul 2011
DOIs	https://doi.org/10.1016/j.cap.2011.02.029
Publication status	Published - Jul 2011
Externally published	Yes
Event	International Conference on Electronic Materials and Nanotechnology for Green Environment (ENGE 2010) - Jeju Island, Korea, Republic of Duration: 21 Nov 2010 → 24 Nov 2010

Research Keywords

Co-doping
Doping concentration
Phosphorescent white organic light emitting diode

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@article{466a794e652d41139bc0cf4d67c02e9b,

title = "Optimizing blue iridium complex and orange-red osmium complex doping concentrations to improve phosphorescent white organic light emitting diodes",

abstract = "The effect of the phosphor doping concentration on the optoelectronic characteristics of white phosphorescence organic light emitting diodes (PHOLEDs) was studied. A high efficiency white PHOLED was achieved using the unique efficiency properties of the red-emitting Osmium complex ([fptz = 3-trifluoromethyl-5-(2-pyridyl)-1,2,4-triazole, PPh2Me = phosphineligand]; Os(fptz)2(PPh2Me)2) combined with a well known efficient blue-emitting Iridium complex (bis[(4,6-difluorophenyl)-pyridinate-N, C2′; FIrpic]). The results demonstrate that with 2 wt% Os(fptz)2(PPh2Me)2 co-doped into the blue-emitting layer (10 wt% FIrpic doped into the host), the device can achieve a luminance efficiency of up to 40.4 cd/A (25.6 lm/W) with a good corresponding CIE coordinate (0.39, 0.40). The doping concentrations of the red-emitting and blue-emitting phosphors were adjusted to obtain a pure white light with a CIE coordinate of (0.368, 0.366). A high efficiency white PHOLED was achieved by optimizing the doping concentration of the red-emitting and blue-emitting complexes.",

keywords = "Co-doping, Doping concentration, Phosphorescent white organic light emitting diode",

author = "Teh-Chao Liao and Hsueh-Tao Chou and Fuh-Shyang Juang and Yu-Sheng Tsai and Shun-Hsi Wang and Vuhoang Tuan and Yun Chi",

year = "2011",

month = jul,

doi = "10.1016/j.cap.2011.02.029",

language = "English",

volume = "11",

pages = "S175--S178",

journal = "Current Applied Physics",

issn = "1567-1739",

publisher = "Elsevier B.V.",

number = "4, Suppl.",

note = "International Conference on Electronic Materials and Nanotechnology for Green Environment (ENGE 2010) ; Conference date: 21-11-2010 Through 24-11-2010",

}

Optimizing blue iridium complex and orange-red osmium complex doping concentrations to improve phosphorescent white organic light emitting diodes. / Liao, Teh-Chao; Chou, Hsueh-Tao; Juang, Fuh-Shyang et al.
In: Current Applied Physics, Vol. 11, No. 4, Suppl., 07.2011, p. S175-S178.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

TY - JOUR

T1 - Optimizing blue iridium complex and orange-red osmium complex doping concentrations to improve phosphorescent white organic light emitting diodes

AU - Liao, Teh-Chao

AU - Chou, Hsueh-Tao

AU - Juang, Fuh-Shyang

AU - Tsai, Yu-Sheng

AU - Wang, Shun-Hsi

AU - Tuan, Vuhoang

AU - Chi, Yun

PY - 2011/7

Y1 - 2011/7

N2 - The effect of the phosphor doping concentration on the optoelectronic characteristics of white phosphorescence organic light emitting diodes (PHOLEDs) was studied. A high efficiency white PHOLED was achieved using the unique efficiency properties of the red-emitting Osmium complex ([fptz = 3-trifluoromethyl-5-(2-pyridyl)-1,2,4-triazole, PPh2Me = phosphineligand]; Os(fptz)2(PPh2Me)2) combined with a well known efficient blue-emitting Iridium complex (bis[(4,6-difluorophenyl)-pyridinate-N, C2′; FIrpic]). The results demonstrate that with 2 wt% Os(fptz)2(PPh2Me)2 co-doped into the blue-emitting layer (10 wt% FIrpic doped into the host), the device can achieve a luminance efficiency of up to 40.4 cd/A (25.6 lm/W) with a good corresponding CIE coordinate (0.39, 0.40). The doping concentrations of the red-emitting and blue-emitting phosphors were adjusted to obtain a pure white light with a CIE coordinate of (0.368, 0.366). A high efficiency white PHOLED was achieved by optimizing the doping concentration of the red-emitting and blue-emitting complexes.

AB - The effect of the phosphor doping concentration on the optoelectronic characteristics of white phosphorescence organic light emitting diodes (PHOLEDs) was studied. A high efficiency white PHOLED was achieved using the unique efficiency properties of the red-emitting Osmium complex ([fptz = 3-trifluoromethyl-5-(2-pyridyl)-1,2,4-triazole, PPh2Me = phosphineligand]; Os(fptz)2(PPh2Me)2) combined with a well known efficient blue-emitting Iridium complex (bis[(4,6-difluorophenyl)-pyridinate-N, C2′; FIrpic]). The results demonstrate that with 2 wt% Os(fptz)2(PPh2Me)2 co-doped into the blue-emitting layer (10 wt% FIrpic doped into the host), the device can achieve a luminance efficiency of up to 40.4 cd/A (25.6 lm/W) with a good corresponding CIE coordinate (0.39, 0.40). The doping concentrations of the red-emitting and blue-emitting phosphors were adjusted to obtain a pure white light with a CIE coordinate of (0.368, 0.366). A high efficiency white PHOLED was achieved by optimizing the doping concentration of the red-emitting and blue-emitting complexes.

KW - Co-doping

KW - Doping concentration

KW - Phosphorescent white organic light emitting diode

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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-80455155070&origin=recordpage

U2 - 10.1016/j.cap.2011.02.029

DO - 10.1016/j.cap.2011.02.029

M3 - RGC 21 - Publication in refereed journal

SN - 1567-1739

VL - 11

SP - S175-S178

JO - Current Applied Physics

JF - Current Applied Physics

IS - 4, Suppl.

T2 - International Conference on Electronic Materials and Nanotechnology for Green Environment (ENGE 2010)

Y2 - 21 November 2010 through 24 November 2010

ER -

Optimizing blue iridium complex and orange-red osmium complex doping concentrations to improve phosphorescent white organic light emitting diodes

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