Efficient Photon Extraction in Top-Emission Organic Light-Emitting Devices Based on Ampicillin Microstructures

Dong Hyun Kim; Chang Min Lee; Amjad Islam; Dong Hyun Choi; Geon Woo Jeong; Tae Wook Kim; Hyun Woo Cho; Yeong Beom Kim; Syed Hamad Ullah Shah; Min Jae Park; Chul Hoon Kim; Hyun Jae Lee; Jae Woo Lee; Seain Bang; Tae Sung Bae; Jong Bae Park; Seung Min Yu; Yong Cheol Kang; Juyun Park; Myeongkee Park; Yeonsu Jeong; Sang Geul Lee; Jong Sung Jin; Kyoung Ho Kim; Muhammad Sujak; Surk Suik Moon; Sanghyuk Park; Myung kwan Song; Chang Su Kim; Seung Yoon Ryu

doi:10.1002/adma.202202866

Efficient Photon Extraction in Top-Emission Organic Light-Emitting Devices Based on Ampicillin Microstructures

Dong Hyun Kim, Chang Min Lee, Amjad Islam, Dong Hyun Choi, Geon Woo Jeong, Tae Wook Kim, Hyun Woo Cho, Yeong Beom Kim, Syed Hamad Ullah Shah, Min Jae Park, Chul Hoon Kim, Hyun Jae Lee, Jae Woo Lee, Seain Bang, Tae Sung Bae, Jong Bae Park, Seung Min Yu, Yong Cheol Kang, Juyun Park, Myeongkee ParkYeonsu Jeong, Sang Geul Lee, Jong Sung Jin, Kyoung Ho Kim, Muhammad Sujak, Surk Suik Moon, Sanghyuk Park, Myung kwan Song, Chang Su Kim, Seung Yoon Ryu

Department of Physics

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

15 Scopus citations

Abstract

The desire to enhance the efficiency of organic light-emitting devices (OLEDs) has driven to the investigation of advanced materials with fascinating properties. In this work, the efficiency of top-emission OLEDs (TEOLEDs) is enhanced by introducing ampicillin microstructures (Amp-MSs) with dual phases (α-/β-phase) that induce photoluminescence (PL) and electroluminescence (EL). Moreover, Amp-MSs can adjust the charge balance by Fermi level (E_F) alignment, thereby decreasing the leakage current. The decrease in the wave-guided modes can enhance the light outcoupling through optical scattering. The resulting TEOLED demonstrates a record-high external quantum efficiency (EQE) (maximum: 68.7% and average: 63.4% at spectroradiometer; maximum: 44.8% and average: 42.6% at integrating sphere) with a wider color gamut (118%) owing to the redshift of the spectrum by J-aggregation. Deconvolution of the EL intensities is performed to clarify the contribution of Amp-MSs to the device EQE enhancement (optical scattering by Amp-MSs: 17.0%, PL by radiative energy transfer: 9.1%, and EL by J-aggregated excitons: 4.6%). The proposed TEOLED outperforms the existing frameworks in terms of device efficiency.

Original language	English
Article number	2202866
Journal	Advanced Materials
Volume	34
Issue number	32
DOIs	https://doi.org/10.1002/adma.202202866
State	Published - 11 Aug 2022

Keywords

J-/H-aggregated excitons
micro-photoluminescence
microcavity ampicillin-microstructure
multiple scattering
top-emission organic light-emitting diodes
wave-guided mode

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10.1002/adma.202202866

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Kim, D. H., Lee, C. M., Islam, A., Choi, D. H., Jeong, G. W., Kim, T. W., Cho, H. W., Kim, Y. B., Shah, S. H. U., Park, M. J., Kim, C. H., Lee, H. J., Lee, J. W., Bang, S., Bae, T. S., Park, J. B., Yu, S. M., Kang, Y. C., Park, J., ... Ryu, S. Y. (2022). Efficient Photon Extraction in Top-Emission Organic Light-Emitting Devices Based on Ampicillin Microstructures. Advanced Materials, 34(32), Article 2202866. https://doi.org/10.1002/adma.202202866

@article{efaf1e5220784ad987ad5fcf05713440,

title = "Efficient Photon Extraction in Top-Emission Organic Light-Emitting Devices Based on Ampicillin Microstructures",

abstract = "The desire to enhance the efficiency of organic light-emitting devices (OLEDs) has driven to the investigation of advanced materials with fascinating properties. In this work, the efficiency of top-emission OLEDs (TEOLEDs) is enhanced by introducing ampicillin microstructures (Amp-MSs) with dual phases (α-/β-phase) that induce photoluminescence (PL) and electroluminescence (EL). Moreover, Amp-MSs can adjust the charge balance by Fermi level (EF) alignment, thereby decreasing the leakage current. The decrease in the wave-guided modes can enhance the light outcoupling through optical scattering. The resulting TEOLED demonstrates a record-high external quantum efficiency (EQE) (maximum: 68.7% and average: 63.4% at spectroradiometer; maximum: 44.8% and average: 42.6% at integrating sphere) with a wider color gamut (118%) owing to the redshift of the spectrum by J-aggregation. Deconvolution of the EL intensities is performed to clarify the contribution of Amp-MSs to the device EQE enhancement (optical scattering by Amp-MSs: 17.0%, PL by radiative energy transfer: 9.1%, and EL by J-aggregated excitons: 4.6%). The proposed TEOLED outperforms the existing frameworks in terms of device efficiency.",

keywords = "J-/H-aggregated excitons, micro-photoluminescence, microcavity ampicillin-microstructure, multiple scattering, top-emission organic light-emitting diodes, wave-guided mode",

author = "Kim, {Dong Hyun} and Lee, {Chang Min} and Amjad Islam and Choi, {Dong Hyun} and Jeong, {Geon Woo} and Kim, {Tae Wook} and Cho, {Hyun Woo} and Kim, {Yeong Beom} and Shah, {Syed Hamad Ullah} and Park, {Min Jae} and Kim, {Chul Hoon} and Lee, {Hyun Jae} and Lee, {Jae Woo} and Seain Bang and Bae, {Tae Sung} and Park, {Jong Bae} and Yu, {Seung Min} and Kang, {Yong Cheol} and Juyun Park and Myeongkee Park and Yeonsu Jeong and Lee, {Sang Geul} and Jin, {Jong Sung} and Kim, {Kyoung Ho} and Muhammad Sujak and Moon, {Surk Suik} and Sanghyuk Park and Song, {Myung kwan} and Kim, {Chang Su} and Ryu, {Seung Yoon}",

note = "Publisher Copyright: {\textcopyright} 2022 Wiley-VCH GmbH.",

year = "2022",

month = aug,

day = "11",

doi = "10.1002/adma.202202866",

language = "English",

volume = "34",

journal = "Advanced Materials",

issn = "0935-9648",

publisher = "Wiley-Blackwell",

number = "32",

}

Kim, DH, Lee, CM, Islam, A, Choi, DH, Jeong, GW, Kim, TW, Cho, HW, Kim, YB, Shah, SHU, Park, MJ, Kim, CH, Lee, HJ, Lee, JW, Bang, S, Bae, TS, Park, JB, Yu, SM, Kang, YC, Park, J, Park, M, Jeong, Y, Lee, SG, Jin, JS, Kim, KH, Sujak, M, Moon, SS, Park, S, Song, MK, Kim, CS & Ryu, SY 2022, 'Efficient Photon Extraction in Top-Emission Organic Light-Emitting Devices Based on Ampicillin Microstructures', Advanced Materials, vol. 34, no. 32, 2202866. https://doi.org/10.1002/adma.202202866

TY - JOUR

T1 - Efficient Photon Extraction in Top-Emission Organic Light-Emitting Devices Based on Ampicillin Microstructures

AU - Kim, Dong Hyun

AU - Lee, Chang Min

AU - Islam, Amjad

AU - Choi, Dong Hyun

AU - Jeong, Geon Woo

AU - Kim, Tae Wook

AU - Cho, Hyun Woo

AU - Kim, Yeong Beom

AU - Shah, Syed Hamad Ullah

AU - Park, Min Jae

AU - Kim, Chul Hoon

AU - Lee, Hyun Jae

AU - Lee, Jae Woo

AU - Bang, Seain

AU - Bae, Tae Sung

AU - Park, Jong Bae

AU - Yu, Seung Min

AU - Kang, Yong Cheol

AU - Park, Juyun

AU - Park, Myeongkee

AU - Jeong, Yeonsu

AU - Lee, Sang Geul

AU - Jin, Jong Sung

AU - Kim, Kyoung Ho

AU - Sujak, Muhammad

AU - Moon, Surk Suik

AU - Park, Sanghyuk

AU - Song, Myung kwan

AU - Kim, Chang Su

AU - Ryu, Seung Yoon

PY - 2022/8/11

Y1 - 2022/8/11

N2 - The desire to enhance the efficiency of organic light-emitting devices (OLEDs) has driven to the investigation of advanced materials with fascinating properties. In this work, the efficiency of top-emission OLEDs (TEOLEDs) is enhanced by introducing ampicillin microstructures (Amp-MSs) with dual phases (α-/β-phase) that induce photoluminescence (PL) and electroluminescence (EL). Moreover, Amp-MSs can adjust the charge balance by Fermi level (EF) alignment, thereby decreasing the leakage current. The decrease in the wave-guided modes can enhance the light outcoupling through optical scattering. The resulting TEOLED demonstrates a record-high external quantum efficiency (EQE) (maximum: 68.7% and average: 63.4% at spectroradiometer; maximum: 44.8% and average: 42.6% at integrating sphere) with a wider color gamut (118%) owing to the redshift of the spectrum by J-aggregation. Deconvolution of the EL intensities is performed to clarify the contribution of Amp-MSs to the device EQE enhancement (optical scattering by Amp-MSs: 17.0%, PL by radiative energy transfer: 9.1%, and EL by J-aggregated excitons: 4.6%). The proposed TEOLED outperforms the existing frameworks in terms of device efficiency.

AB - The desire to enhance the efficiency of organic light-emitting devices (OLEDs) has driven to the investigation of advanced materials with fascinating properties. In this work, the efficiency of top-emission OLEDs (TEOLEDs) is enhanced by introducing ampicillin microstructures (Amp-MSs) with dual phases (α-/β-phase) that induce photoluminescence (PL) and electroluminescence (EL). Moreover, Amp-MSs can adjust the charge balance by Fermi level (EF) alignment, thereby decreasing the leakage current. The decrease in the wave-guided modes can enhance the light outcoupling through optical scattering. The resulting TEOLED demonstrates a record-high external quantum efficiency (EQE) (maximum: 68.7% and average: 63.4% at spectroradiometer; maximum: 44.8% and average: 42.6% at integrating sphere) with a wider color gamut (118%) owing to the redshift of the spectrum by J-aggregation. Deconvolution of the EL intensities is performed to clarify the contribution of Amp-MSs to the device EQE enhancement (optical scattering by Amp-MSs: 17.0%, PL by radiative energy transfer: 9.1%, and EL by J-aggregated excitons: 4.6%). The proposed TEOLED outperforms the existing frameworks in terms of device efficiency.

KW - J-/H-aggregated excitons

KW - micro-photoluminescence

KW - microcavity ampicillin-microstructure

KW - multiple scattering

KW - top-emission organic light-emitting diodes

KW - wave-guided mode

UR - http://www.scopus.com/inward/record.url?scp=85133660896&partnerID=8YFLogxK

U2 - 10.1002/adma.202202866

DO - 10.1002/adma.202202866

M3 - Article

C2 - 35700272

AN - SCOPUS:85133660896

SN - 0935-9648

VL - 34

JO - Advanced Materials

JF - Advanced Materials

IS - 32

M1 - 2202866

ER -

Efficient Photon Extraction in Top-Emission Organic Light-Emitting Devices Based on Ampicillin Microstructures

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