Durable Molecular Organic Electroluminescent Devices and Their Frequency Responses to a New Accurate Driving Method

Hiroyuki FUJII; Hiroshi KANNO; Takeshi SANO; Yoshitaka NISHIO; Yuji HAMADA; Hisakazu TAKAHASHI; Tatsuro USUKI; Kenichi SHIBATA

Durable Molecular Organic Electroluminescent Devices and Their Frequency Responses to a New Accurate Driving Method

Hiroyuki FUJII, Hiroshi KANNO, Takeshi SANO, Yoshitaka NISHIO, Yuji HAMADA, Hisakazu TAKAHASHI, Tatsuro USUKI, Kenichi SHIBATA

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In order to improve the running durability of organic electroluminescent devices (OELDs), the doping sites of molecular OELDs were optimized, and the frequency responses of the optimized devices were examined for Mg-In/bis (10-hydroxybenzo[h]quinolinate) beryllium (BeBq₂)/N, N'-diphenyl-N, N'-(3-methylphenyl)-1, 1'-biphenyl-4, 4'-diamine (TPD)/4, 4', 4"-tris (3-methylphenylphenylamino) triphenylamine (MTDATA)/ITO. The TPD hole transport layer was the optimum doping site for 5, 6, 11, 12-tetraphenylnaphthacene (rubrene) dopant, and a very high efficiency of 13 cd/A at 0. 13 kcd/m² was obtained for yellow emission. Half-decay times under a constant direct current density of 1. 0 mA/cm² from an initial luminance of 0. 13 kcd/m² extended to longer than 26,000 hours. The luminance of the optimized device decreases lineally with respect to the logarithm of the frequency as the frequency increases in the range from 1 kHz to 0. 3 MHz when a square wave with a duty ratio of 50% and a maximum voltage of 5.0 V is applied. A new driving method involving frequency modulation is proposed. This may offer accurate control of pixel luminance, and enable simple driving circuits adapted to highly integrated digital LSI chips, or the concept of system on glass.

Publication: IEICE TRANSACTIONS on Electronics Vol.E81-C No.7 pp.1034-1040

Publication Date: 1998/07/25

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Type of Manuscript: Special Section PAPER (Special Issue on Organic Materials for Optics and Electronics)

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Hiroyuki FUJII, Hiroshi KANNO, Takeshi SANO, Yoshitaka NISHIO, Yuji HAMADA, Hisakazu TAKAHASHI, Tatsuro USUKI, Kenichi SHIBATA, "Durable Molecular Organic Electroluminescent Devices and Their Frequency Responses to a New Accurate Driving Method" in IEICE TRANSACTIONS on Electronics, vol. E81-C, no. 7, pp. 1034-1040, July 1998, doi: .
Abstract: In order to improve the running durability of organic electroluminescent devices (OELDs), the doping sites of molecular OELDs were optimized, and the frequency responses of the optimized devices were examined for Mg-In/bis (10-hydroxybenzo[h]quinolinate) beryllium (BeBq₂)/N, N'-diphenyl-N, N'-(3-methylphenyl)-1, 1'-biphenyl-4, 4'-diamine (TPD)/4, 4', 4"-tris (3-methylphenylphenylamino) triphenylamine (MTDATA)/ITO. The TPD hole transport layer was the optimum doping site for 5, 6, 11, 12-tetraphenylnaphthacene (rubrene) dopant, and a very high efficiency of 13 cd/A at 0. 13 kcd/m² was obtained for yellow emission. Half-decay times under a constant direct current density of 1. 0 mA/cm² from an initial luminance of 0. 13 kcd/m² extended to longer than 26,000 hours. The luminance of the optimized device decreases lineally with respect to the logarithm of the frequency as the frequency increases in the range from 1 kHz to 0. 3 MHz when a square wave with a duty ratio of 50% and a maximum voltage of 5.0 V is applied. A new driving method involving frequency modulation is proposed. This may offer accurate control of pixel luminance, and enable simple driving circuits adapted to highly integrated digital LSI chips, or the concept of system on glass.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/e81-c_7_1034/_p

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@ARTICLE{e81-c_7_1034,
author={Hiroyuki FUJII, Hiroshi KANNO, Takeshi SANO, Yoshitaka NISHIO, Yuji HAMADA, Hisakazu TAKAHASHI, Tatsuro USUKI, Kenichi SHIBATA, },
journal={IEICE TRANSACTIONS on Electronics},
title={Durable Molecular Organic Electroluminescent Devices and Their Frequency Responses to a New Accurate Driving Method},
year={1998},
volume={E81-C},
number={7},
pages={1034-1040},
abstract={In order to improve the running durability of organic electroluminescent devices (OELDs), the doping sites of molecular OELDs were optimized, and the frequency responses of the optimized devices were examined for Mg-In/bis (10-hydroxybenzo[h]quinolinate) beryllium (BeBq₂)/N, N'-diphenyl-N, N'-(3-methylphenyl)-1, 1'-biphenyl-4, 4'-diamine (TPD)/4, 4', 4"-tris (3-methylphenylphenylamino) triphenylamine (MTDATA)/ITO. The TPD hole transport layer was the optimum doping site for 5, 6, 11, 12-tetraphenylnaphthacene (rubrene) dopant, and a very high efficiency of 13 cd/A at 0. 13 kcd/m² was obtained for yellow emission. Half-decay times under a constant direct current density of 1. 0 mA/cm² from an initial luminance of 0. 13 kcd/m² extended to longer than 26,000 hours. The luminance of the optimized device decreases lineally with respect to the logarithm of the frequency as the frequency increases in the range from 1 kHz to 0. 3 MHz when a square wave with a duty ratio of 50% and a maximum voltage of 5.0 V is applied. A new driving method involving frequency modulation is proposed. This may offer accurate control of pixel luminance, and enable simple driving circuits adapted to highly integrated digital LSI chips, or the concept of system on glass.},
keywords={},
doi={},
ISSN={},
month={July},}

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TY - JOUR
TI - Durable Molecular Organic Electroluminescent Devices and Their Frequency Responses to a New Accurate Driving Method
T2 - IEICE TRANSACTIONS on Electronics
SP - 1034
EP - 1040
AU - Hiroyuki FUJII
AU - Hiroshi KANNO
AU - Takeshi SANO
AU - Yoshitaka NISHIO
AU - Yuji HAMADA
AU - Hisakazu TAKAHASHI
AU - Tatsuro USUKI
AU - Kenichi SHIBATA
PY - 1998
DO -
JO - IEICE TRANSACTIONS on Electronics
SN -
VL - E81-C
IS - 7
JA - IEICE TRANSACTIONS on Electronics
Y1 - July 1998
AB - In order to improve the running durability of organic electroluminescent devices (OELDs), the doping sites of molecular OELDs were optimized, and the frequency responses of the optimized devices were examined for Mg-In/bis (10-hydroxybenzo[h]quinolinate) beryllium (BeBq₂)/N, N'-diphenyl-N, N'-(3-methylphenyl)-1, 1'-biphenyl-4, 4'-diamine (TPD)/4, 4', 4"-tris (3-methylphenylphenylamino) triphenylamine (MTDATA)/ITO. The TPD hole transport layer was the optimum doping site for 5, 6, 11, 12-tetraphenylnaphthacene (rubrene) dopant, and a very high efficiency of 13 cd/A at 0. 13 kcd/m² was obtained for yellow emission. Half-decay times under a constant direct current density of 1. 0 mA/cm² from an initial luminance of 0. 13 kcd/m² extended to longer than 26,000 hours. The luminance of the optimized device decreases lineally with respect to the logarithm of the frequency as the frequency increases in the range from 1 kHz to 0. 3 MHz when a square wave with a duty ratio of 50% and a maximum voltage of 5.0 V is applied. A new driving method involving frequency modulation is proposed. This may offer accurate control of pixel luminance, and enable simple driving circuits adapted to highly integrated digital LSI chips, or the concept of system on glass.
ER -