Multi-stacked organic light-emitting diodes using zinc oxide nanoparticle interfacial layers

Seung Yoon Ryu; Sung Hyun Kim; Chang Su Kim; Sungjin Jo; Jun Yeob Lee

doi:10.1016/j.cap.2012.03.033

Multi-stacked organic light-emitting diodes using zinc oxide nanoparticle interfacial layers

Seung Yoon Ryu, Sung Hyun Kim, Chang Su Kim, Sungjin Jo, Jun Yeob Lee

School of Energy Engineering

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

5 Scopus citations

Abstract

Stacked organic light-emitting diodes (SOLEDs) with 30-nm nanoparticle (NP) interfacial layers were investigated. Zinc oxide (ZnO) was used as an interfacial layer between two green polymer (GP) layers. SOLEDs with NP interfacial layers had higher device efficiency than did a single-unit device due to the high probability of exciton recombination that originated from the Auger electron-assisted energy up-conversion process. Although the current density and luminance of SOLEDs with ZnO NP interfacial layers were smaller than those of the reference device, the efficiency was doubled because of the big band alignment difference and the large band gap between GP and ZnO NP interfacial layers, which induced more radiative-exciton recombination.

Original language	English
Pages (from-to)	1378-1380
Number of pages	3
Journal	Current Applied Physics
Volume	12
Issue number	5
DOIs	https://doi.org/10.1016/j.cap.2012.03.033
State	Published - Sep 2012

Keywords

Stacked OLEDs
Tandem OLEDs
ZnO nanoparticles

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10.1016/j.cap.2012.03.033

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title = "Multi-stacked organic light-emitting diodes using zinc oxide nanoparticle interfacial layers",

abstract = "Stacked organic light-emitting diodes (SOLEDs) with 30-nm nanoparticle (NP) interfacial layers were investigated. Zinc oxide (ZnO) was used as an interfacial layer between two green polymer (GP) layers. SOLEDs with NP interfacial layers had higher device efficiency than did a single-unit device due to the high probability of exciton recombination that originated from the Auger electron-assisted energy up-conversion process. Although the current density and luminance of SOLEDs with ZnO NP interfacial layers were smaller than those of the reference device, the efficiency was doubled because of the big band alignment difference and the large band gap between GP and ZnO NP interfacial layers, which induced more radiative-exciton recombination.",

keywords = "Stacked OLEDs, Tandem OLEDs, ZnO nanoparticles",

author = "Ryu, {Seung Yoon} and Kim, {Sung Hyun} and Kim, {Chang Su} and Sungjin Jo and Lee, {Jun Yeob}",

year = "2012",

month = sep,

doi = "10.1016/j.cap.2012.03.033",

language = "English",

volume = "12",

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journal = "Current Applied Physics",

issn = "1567-1739",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Multi-stacked organic light-emitting diodes using zinc oxide nanoparticle interfacial layers

AU - Ryu, Seung Yoon

AU - Kim, Sung Hyun

AU - Kim, Chang Su

AU - Jo, Sungjin

AU - Lee, Jun Yeob

PY - 2012/9

Y1 - 2012/9

N2 - Stacked organic light-emitting diodes (SOLEDs) with 30-nm nanoparticle (NP) interfacial layers were investigated. Zinc oxide (ZnO) was used as an interfacial layer between two green polymer (GP) layers. SOLEDs with NP interfacial layers had higher device efficiency than did a single-unit device due to the high probability of exciton recombination that originated from the Auger electron-assisted energy up-conversion process. Although the current density and luminance of SOLEDs with ZnO NP interfacial layers were smaller than those of the reference device, the efficiency was doubled because of the big band alignment difference and the large band gap between GP and ZnO NP interfacial layers, which induced more radiative-exciton recombination.

AB - Stacked organic light-emitting diodes (SOLEDs) with 30-nm nanoparticle (NP) interfacial layers were investigated. Zinc oxide (ZnO) was used as an interfacial layer between two green polymer (GP) layers. SOLEDs with NP interfacial layers had higher device efficiency than did a single-unit device due to the high probability of exciton recombination that originated from the Auger electron-assisted energy up-conversion process. Although the current density and luminance of SOLEDs with ZnO NP interfacial layers were smaller than those of the reference device, the efficiency was doubled because of the big band alignment difference and the large band gap between GP and ZnO NP interfacial layers, which induced more radiative-exciton recombination.

KW - Stacked OLEDs

KW - Tandem OLEDs

KW - ZnO nanoparticles

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DO - 10.1016/j.cap.2012.03.033

M3 - Article

AN - SCOPUS:84861580131

SN - 1567-1739

VL - 12

SP - 1378

EP - 1380

JO - Current Applied Physics

JF - Current Applied Physics

IS - 5

ER -

Multi-stacked organic light-emitting diodes using zinc oxide nanoparticle interfacial layers

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Keywords

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