Asymmetric voltage waveform for enhanced exciton generation in alternative-current field-induced electroluminescence device

Byeonggon Kim; Su Min An; Duck Kyu Lim; Chi Heon Kim; Ji Sub Park; Hak Rin Kim

doi:10.1364/OE.408774

Asymmetric voltage waveform for enhanced exciton generation in alternative-current field-induced electroluminescence device

Byeonggon Kim, Su Min An, Duck Kyu Lim, Chi Heon Kim, Ji Sub Park, Hak Rin Kim

School of Electronics Engineering

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

1 Scopus citations

Abstract

We propose an alternating current (AC) field operation scheme by using an asymmetric voltage waveform to improve the electroluminescence property of AC field-induced electroluminescence (AC-FIEL) devices. Hole injection and transport can be improved by carbon nanotubes (CNT) doping into the emission layer of an AC-FIEL structure operated by a single electrode for AC-responsive alternating carrier injections. However, under an AC operation, highly unbalanced charge transports are inevitably present in CNT-doped AC-FIEL devices due to faster carrier paths through CNTs. Compared with symmetric waveform, asymmetric waveform can be adjusted to allow longer relative duty time for faster carriers in which the luminance level of CNT-doped AC-FIEL devices can be improved by 1.4 times at the same device structure and operation frequency condition.

Original language	English
Pages (from-to)	40075-40087
Number of pages	13
Journal	Optics Express
Volume	28
Issue number	26
DOIs	https://doi.org/10.1364/OE.408774
State	Published - 21 Dec 2020

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title = "Asymmetric voltage waveform for enhanced exciton generation in alternative-current field-induced electroluminescence device",

abstract = "We propose an alternating current (AC) field operation scheme by using an asymmetric voltage waveform to improve the electroluminescence property of AC field-induced electroluminescence (AC-FIEL) devices. Hole injection and transport can be improved by carbon nanotubes (CNT) doping into the emission layer of an AC-FIEL structure operated by a single electrode for AC-responsive alternating carrier injections. However, under an AC operation, highly unbalanced charge transports are inevitably present in CNT-doped AC-FIEL devices due to faster carrier paths through CNTs. Compared with symmetric waveform, asymmetric waveform can be adjusted to allow longer relative duty time for faster carriers in which the luminance level of CNT-doped AC-FIEL devices can be improved by 1.4 times at the same device structure and operation frequency condition.",

author = "Byeonggon Kim and An, {Su Min} and Lim, {Duck Kyu} and Kim, {Chi Heon} and Park, {Ji Sub} and Kim, {Hak Rin}",

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T1 - Asymmetric voltage waveform for enhanced exciton generation in alternative-current field-induced electroluminescence device

AU - Kim, Byeonggon

AU - An, Su Min

AU - Lim, Duck Kyu

AU - Kim, Chi Heon

AU - Park, Ji Sub

AU - Kim, Hak Rin

PY - 2020/12/21

Y1 - 2020/12/21

N2 - We propose an alternating current (AC) field operation scheme by using an asymmetric voltage waveform to improve the electroluminescence property of AC field-induced electroluminescence (AC-FIEL) devices. Hole injection and transport can be improved by carbon nanotubes (CNT) doping into the emission layer of an AC-FIEL structure operated by a single electrode for AC-responsive alternating carrier injections. However, under an AC operation, highly unbalanced charge transports are inevitably present in CNT-doped AC-FIEL devices due to faster carrier paths through CNTs. Compared with symmetric waveform, asymmetric waveform can be adjusted to allow longer relative duty time for faster carriers in which the luminance level of CNT-doped AC-FIEL devices can be improved by 1.4 times at the same device structure and operation frequency condition.

AB - We propose an alternating current (AC) field operation scheme by using an asymmetric voltage waveform to improve the electroluminescence property of AC field-induced electroluminescence (AC-FIEL) devices. Hole injection and transport can be improved by carbon nanotubes (CNT) doping into the emission layer of an AC-FIEL structure operated by a single electrode for AC-responsive alternating carrier injections. However, under an AC operation, highly unbalanced charge transports are inevitably present in CNT-doped AC-FIEL devices due to faster carrier paths through CNTs. Compared with symmetric waveform, asymmetric waveform can be adjusted to allow longer relative duty time for faster carriers in which the luminance level of CNT-doped AC-FIEL devices can be improved by 1.4 times at the same device structure and operation frequency condition.

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Asymmetric voltage waveform for enhanced exciton generation in alternative-current field-induced electroluminescence device

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