Enhanced carrier balance by organic salt doping in single-layer polymer light-emitting devices

Dong Hyun Lee; Jong Hyeok Park; Heeyeop Chae; Sung M. Cho

doi:10.1016/j.orgel.2009.07.014

Enhanced carrier balance by organic salt doping in single-layer polymer light-emitting devices

Dong Hyun Lee, Jong Hyeok Park, Heeyeop Chae, Sung M. Cho

Department of Chemical and Biomolecular Engineering

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

19 Citations (Scopus)

Abstract

We have showed that the doping of an organic salt into a PVK-based polymer emissive layer could enhance the carrier balance greatly to result in higher luminance and luminous efficiency. It is found out that the salt-doped devices show the similar operating characteristics of frozen-junction light-emitting electrochemical cells (LECs). With the salt doping of 0.6 wt.% and an appropriate salt activation process, the fabricated PVK-based polymer light-emitting diodes (PLEDs) shows the luminous efficiency of 15 cd/A at the highest luminance of 55,000 cd/m² even without an electron-injecting LiF layer. Due to the enhanced carrier balance, the luminous efficiency is found to be maintained from the turn-on voltage to the voltage for the maximum luminance, which means a linear relationship between luminance and current density.

Original language	English
Pages (from-to)	1345-1351
Number of pages	7
Journal	Organic Electronics
Volume	10
Issue number	7
DOIs	https://doi.org/10.1016/j.orgel.2009.07.014
Publication status	Published - 2009 Nov

Bibliographical note

Funding Information:
This work was supported by a grant from Gyeonggi Province through the GRRC (Gyeonggi Regional Research Center) program in Sungkyunkwan University.

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Biomaterials
Chemistry(all)
Condensed Matter Physics
Materials Chemistry
Electrical and Electronic Engineering

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10.1016/j.orgel.2009.07.014

Cite this

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title = "Enhanced carrier balance by organic salt doping in single-layer polymer light-emitting devices",

abstract = "We have showed that the doping of an organic salt into a PVK-based polymer emissive layer could enhance the carrier balance greatly to result in higher luminance and luminous efficiency. It is found out that the salt-doped devices show the similar operating characteristics of frozen-junction light-emitting electrochemical cells (LECs). With the salt doping of 0.6 wt.% and an appropriate salt activation process, the fabricated PVK-based polymer light-emitting diodes (PLEDs) shows the luminous efficiency of 15 cd/A at the highest luminance of 55,000 cd/m2 even without an electron-injecting LiF layer. Due to the enhanced carrier balance, the luminous efficiency is found to be maintained from the turn-on voltage to the voltage for the maximum luminance, which means a linear relationship between luminance and current density.",

author = "Lee, {Dong Hyun} and Park, {Jong Hyeok} and Heeyeop Chae and Cho, {Sung M.}",

note = "Funding Information: This work was supported by a grant from Gyeonggi Province through the GRRC (Gyeonggi Regional Research Center) program in Sungkyunkwan University.",

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AU - Lee, Dong Hyun

AU - Park, Jong Hyeok

AU - Chae, Heeyeop

AU - Cho, Sung M.

N1 - Funding Information: This work was supported by a grant from Gyeonggi Province through the GRRC (Gyeonggi Regional Research Center) program in Sungkyunkwan University.

PY - 2009/11

Y1 - 2009/11

N2 - We have showed that the doping of an organic salt into a PVK-based polymer emissive layer could enhance the carrier balance greatly to result in higher luminance and luminous efficiency. It is found out that the salt-doped devices show the similar operating characteristics of frozen-junction light-emitting electrochemical cells (LECs). With the salt doping of 0.6 wt.% and an appropriate salt activation process, the fabricated PVK-based polymer light-emitting diodes (PLEDs) shows the luminous efficiency of 15 cd/A at the highest luminance of 55,000 cd/m2 even without an electron-injecting LiF layer. Due to the enhanced carrier balance, the luminous efficiency is found to be maintained from the turn-on voltage to the voltage for the maximum luminance, which means a linear relationship between luminance and current density.

AB - We have showed that the doping of an organic salt into a PVK-based polymer emissive layer could enhance the carrier balance greatly to result in higher luminance and luminous efficiency. It is found out that the salt-doped devices show the similar operating characteristics of frozen-junction light-emitting electrochemical cells (LECs). With the salt doping of 0.6 wt.% and an appropriate salt activation process, the fabricated PVK-based polymer light-emitting diodes (PLEDs) shows the luminous efficiency of 15 cd/A at the highest luminance of 55,000 cd/m2 even without an electron-injecting LiF layer. Due to the enhanced carrier balance, the luminous efficiency is found to be maintained from the turn-on voltage to the voltage for the maximum luminance, which means a linear relationship between luminance and current density.

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Enhanced carrier balance by organic salt doping in single-layer polymer light-emitting devices

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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