Enhancement of efficiency for white-organic light-emitting diode with a thin electron-blocking layer

Jung Soo Park; Joo Won Lee; Young Min Kim; Sung Jin Bae; Jin Jang; Jai Kyeong Kim; Byeong Kwon Ju

doi:10.1149/1.2050487

Enhancement of efficiency for white-organic light-emitting diode with a thin electron-blocking layer

Jung Soo Park, Joo Won Lee, Young Min Kim, Sung Jin Bae, Jin Jang, Jai Kyeong Kim, Byeong Kwon Ju

School of Electrical Engineering

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

In this study, we have enhanced the emission property of white-organic light-emitting diodes using the method of inserting the ultrathin electron-blocking layer (thin-EBL) between red-green-blue emissive layers. The devices into which three emissive layers are inserted were fabricated with indium tin oxide/CuPc/[A',A''-di(naphthalene-l-yl)-N,N′-diphenyl- benzidine] (α-NPD/DPVBi/thin-EBL/Alq₃/Alq₃: 2 wt % 4-(dicyano-methylene)-2-methyl-6-(dirnethylaminostyryl-4tf-pyran (DCM1)/ Alq₃/LiF:Al. To enhance the white emission property and improve the efficiency of devices, we suggest the α-NPD as the thin-EBL. According to knowledge of the energy band diagram, α-NPD was inserted between the blue-emitting layer and green-emitting layer. The a-NPD layer showed the effective blocking of electron as a function of thickness. From the Experimental, the effective blocking of electrons through controlling the thin-EBL thickness embodied the balanced white emission and improved the efficiency of the device. In our device with 0.3 nm α-NPD, it had a maximum power efficiency of 3.80 Im/W at 250 cd/m², a luminance efficiency of 5.14 cd/A at 4.83 mA/m², a luminance of 1200 cd/m ² at 100 mA/cm², and the CIE coordinates were (0.353, 0.357), respectively.

Original language	English
Pages (from-to)	H196-H199
Journal	Journal of the Electrochemical Society
Volume	152
Issue number	11
DOIs	https://doi.org/10.1149/1.2050487
Publication status	Published - 2005

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Renewable Energy, Sustainability and the Environment
Condensed Matter Physics
Surfaces, Coatings and Films
Electrochemistry
Materials Chemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1149/1.2050487

Cite this

@article{725bd53c0c0b4c2fa4a53da6e4abe109,

title = "Enhancement of efficiency for white-organic light-emitting diode with a thin electron-blocking layer",

abstract = "In this study, we have enhanced the emission property of white-organic light-emitting diodes using the method of inserting the ultrathin electron-blocking layer (thin-EBL) between red-green-blue emissive layers. The devices into which three emissive layers are inserted were fabricated with indium tin oxide/CuPc/[A',A''-di(naphthalene-l-yl)-N,N′-diphenyl- benzidine] (α-NPD/DPVBi/thin-EBL/Alq3/Alq3: 2 wt % 4-(dicyano-methylene)-2-methyl-6-(dirnethylaminostyryl-4tf-pyran (DCM1)/ Alq3/LiF:Al. To enhance the white emission property and improve the efficiency of devices, we suggest the α-NPD as the thin-EBL. According to knowledge of the energy band diagram, α-NPD was inserted between the blue-emitting layer and green-emitting layer. The a-NPD layer showed the effective blocking of electron as a function of thickness. From the Experimental, the effective blocking of electrons through controlling the thin-EBL thickness embodied the balanced white emission and improved the efficiency of the device. In our device with 0.3 nm α-NPD, it had a maximum power efficiency of 3.80 Im/W at 250 cd/m2, a luminance efficiency of 5.14 cd/A at 4.83 mA/m2, a luminance of 1200 cd/m 2 at 100 mA/cm2, and the CIE coordinates were (0.353, 0.357), respectively.",

author = "Park, {Jung Soo} and Lee, {Joo Won} and Kim, {Young Min} and Bae, {Sung Jin} and Jin Jang and Kim, {Jai Kyeong} and Ju, {Byeong Kwon}",

year = "2005",

doi = "10.1149/1.2050487",

language = "English",

volume = "152",

pages = "H196--H199",

journal = "Journal of the Electrochemical Society",

issn = "0013-4651",

publisher = "Institute of Physics",

number = "11",

}

TY - JOUR

T1 - Enhancement of efficiency for white-organic light-emitting diode with a thin electron-blocking layer

AU - Park, Jung Soo

AU - Lee, Joo Won

AU - Kim, Young Min

AU - Bae, Sung Jin

AU - Jang, Jin

AU - Kim, Jai Kyeong

AU - Ju, Byeong Kwon

PY - 2005

Y1 - 2005

N2 - In this study, we have enhanced the emission property of white-organic light-emitting diodes using the method of inserting the ultrathin electron-blocking layer (thin-EBL) between red-green-blue emissive layers. The devices into which three emissive layers are inserted were fabricated with indium tin oxide/CuPc/[A',A''-di(naphthalene-l-yl)-N,N′-diphenyl- benzidine] (α-NPD/DPVBi/thin-EBL/Alq3/Alq3: 2 wt % 4-(dicyano-methylene)-2-methyl-6-(dirnethylaminostyryl-4tf-pyran (DCM1)/ Alq3/LiF:Al. To enhance the white emission property and improve the efficiency of devices, we suggest the α-NPD as the thin-EBL. According to knowledge of the energy band diagram, α-NPD was inserted between the blue-emitting layer and green-emitting layer. The a-NPD layer showed the effective blocking of electron as a function of thickness. From the Experimental, the effective blocking of electrons through controlling the thin-EBL thickness embodied the balanced white emission and improved the efficiency of the device. In our device with 0.3 nm α-NPD, it had a maximum power efficiency of 3.80 Im/W at 250 cd/m2, a luminance efficiency of 5.14 cd/A at 4.83 mA/m2, a luminance of 1200 cd/m 2 at 100 mA/cm2, and the CIE coordinates were (0.353, 0.357), respectively.

AB - In this study, we have enhanced the emission property of white-organic light-emitting diodes using the method of inserting the ultrathin electron-blocking layer (thin-EBL) between red-green-blue emissive layers. The devices into which three emissive layers are inserted were fabricated with indium tin oxide/CuPc/[A',A''-di(naphthalene-l-yl)-N,N′-diphenyl- benzidine] (α-NPD/DPVBi/thin-EBL/Alq3/Alq3: 2 wt % 4-(dicyano-methylene)-2-methyl-6-(dirnethylaminostyryl-4tf-pyran (DCM1)/ Alq3/LiF:Al. To enhance the white emission property and improve the efficiency of devices, we suggest the α-NPD as the thin-EBL. According to knowledge of the energy band diagram, α-NPD was inserted between the blue-emitting layer and green-emitting layer. The a-NPD layer showed the effective blocking of electron as a function of thickness. From the Experimental, the effective blocking of electrons through controlling the thin-EBL thickness embodied the balanced white emission and improved the efficiency of the device. In our device with 0.3 nm α-NPD, it had a maximum power efficiency of 3.80 Im/W at 250 cd/m2, a luminance efficiency of 5.14 cd/A at 4.83 mA/m2, a luminance of 1200 cd/m 2 at 100 mA/cm2, and the CIE coordinates were (0.353, 0.357), respectively.

UR - http://www.scopus.com/inward/record.url?scp=27944476014&partnerID=8YFLogxK

U2 - 10.1149/1.2050487

DO - 10.1149/1.2050487

M3 - Article

AN - SCOPUS:27944476014

SN - 0013-4651

VL - 152

SP - H196-H199

JO - Journal of the Electrochemical Society

JF - Journal of the Electrochemical Society

IS - 11

ER -

Enhancement of efficiency for white-organic light-emitting diode with a thin electron-blocking layer

Abstract

ASJC Scopus subject areas

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this