Improved performance of the thermally activated delayed fluorescence-based cool-white OLEDs with an efficient blue exciplex structure

Bing Yi Lan; Cheng Yen Chuang; Chen Tung Tseng; Jhih Yu Ke; Sheng Yuan Chu; Po Ching Kao

doi:10.1016/j.optmat.2025.116745

Improved performance of the thermally activated delayed fluorescence-based cool-white OLEDs with an efficient blue exciplex structure

Bing Yi Lan, Cheng Yen Chuang, Chen Tung Tseng, Jhih Yu Ke, Sheng Yuan Chu, Po Ching Kao

Department of Electrical Engineering

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

Abstract

In this paper, a cool-white OLEDs is proposed with the structure as ITO/TAPC(30 nm)/mCP:Ir(piq)₃ (15 wt%,5 nm)/mCP(5 nm)/mCP:4CzIPN (3 wt%,5 nm)/PO-T2T(40 nm)/LiF(1 nm)/Al(100 nm). The blue emission from Exciplex, combined with red and green guest materials, serves as the basis for the three-primary-color WOLED. Subsequently, the optimization of the device was carried out through single-carrier balance, structural adjustments, tuning of guest doping concentrations, and modifications of the transport layer thickness. As a result, the final WOLEDs achieved a maximum current efficiency (CE_max) of 34.4 cd/A, a maximum power efficiency (PE_max) of 36.1 lm/W, a maximum external quantum efficiency (EQE_max) of 20.8 %, and a color rendering index (CRI) of 81.

Original language	English
Article number	116745
Journal	Optical Materials
Volume	160
DOIs	https://doi.org/10.1016/j.optmat.2025.116745
Publication status	Published - 2025 Mar

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Spectroscopy
Physical and Theoretical Chemistry
Organic Chemistry
Inorganic Chemistry
Electrical and Electronic Engineering

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10.1016/j.optmat.2025.116745

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@article{0572e7798c91495e90efbd120ab909ca,

title = "Improved performance of the thermally activated delayed fluorescence-based cool-white OLEDs with an efficient blue exciplex structure",

abstract = "In this paper, a cool-white OLEDs is proposed with the structure as ITO/TAPC(30 nm)/mCP:Ir(piq)3 (15 wt%,5 nm)/mCP(5 nm)/mCP:4CzIPN (3 wt%,5 nm)/PO-T2T(40 nm)/LiF(1 nm)/Al(100 nm). The blue emission from Exciplex, combined with red and green guest materials, serves as the basis for the three-primary-color WOLED. Subsequently, the optimization of the device was carried out through single-carrier balance, structural adjustments, tuning of guest doping concentrations, and modifications of the transport layer thickness. As a result, the final WOLEDs achieved a maximum current efficiency (CEmax) of 34.4 cd/A, a maximum power efficiency (PEmax) of 36.1 lm/W, a maximum external quantum efficiency (EQEmax) of 20.8 %, and a color rendering index (CRI) of 81.",

author = "Lan, {Bing Yi} and Chuang, {Cheng Yen} and Tseng, {Chen Tung} and Ke, {Jhih Yu} and Chu, {Sheng Yuan} and Kao, {Po Ching}",

note = "Publisher Copyright: {\textcopyright} 2025 Elsevier B.V.",

year = "2025",

month = mar,

doi = "10.1016/j.optmat.2025.116745",

language = "English",

volume = "160",

journal = "Optical Materials",

issn = "0925-3467",

publisher = "Elsevier",

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T1 - Improved performance of the thermally activated delayed fluorescence-based cool-white OLEDs with an efficient blue exciplex structure

AU - Lan, Bing Yi

AU - Chuang, Cheng Yen

AU - Tseng, Chen Tung

AU - Ke, Jhih Yu

AU - Chu, Sheng Yuan

AU - Kao, Po Ching

PY - 2025/3

Y1 - 2025/3

N2 - In this paper, a cool-white OLEDs is proposed with the structure as ITO/TAPC(30 nm)/mCP:Ir(piq)3 (15 wt%,5 nm)/mCP(5 nm)/mCP:4CzIPN (3 wt%,5 nm)/PO-T2T(40 nm)/LiF(1 nm)/Al(100 nm). The blue emission from Exciplex, combined with red and green guest materials, serves as the basis for the three-primary-color WOLED. Subsequently, the optimization of the device was carried out through single-carrier balance, structural adjustments, tuning of guest doping concentrations, and modifications of the transport layer thickness. As a result, the final WOLEDs achieved a maximum current efficiency (CEmax) of 34.4 cd/A, a maximum power efficiency (PEmax) of 36.1 lm/W, a maximum external quantum efficiency (EQEmax) of 20.8 %, and a color rendering index (CRI) of 81.

AB - In this paper, a cool-white OLEDs is proposed with the structure as ITO/TAPC(30 nm)/mCP:Ir(piq)3 (15 wt%,5 nm)/mCP(5 nm)/mCP:4CzIPN (3 wt%,5 nm)/PO-T2T(40 nm)/LiF(1 nm)/Al(100 nm). The blue emission from Exciplex, combined with red and green guest materials, serves as the basis for the three-primary-color WOLED. Subsequently, the optimization of the device was carried out through single-carrier balance, structural adjustments, tuning of guest doping concentrations, and modifications of the transport layer thickness. As a result, the final WOLEDs achieved a maximum current efficiency (CEmax) of 34.4 cd/A, a maximum power efficiency (PEmax) of 36.1 lm/W, a maximum external quantum efficiency (EQEmax) of 20.8 %, and a color rendering index (CRI) of 81.

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JO - Optical Materials

JF - Optical Materials

M1 - 116745

ER -

Improved performance of the thermally activated delayed fluorescence-based cool-white OLEDs with an efficient blue exciplex structure

Abstract

All Science Journal Classification (ASJC) codes

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