Highly Efficient and Reliable Organic Light–Emitting Diodes Enabled by a Multifunctional Hazy Substrate for Extreme Environments

Yongmin Jeon; Takhee Lee; Minwoo Nam; Hyeongjun Lee; Hyeunwoo Kim; Sun‐Woo Lee; Seung Jin Oh; Seungyeop Choi; Jun‐Yeong Yang; Sunghoon Jung; Seunghun Lee; Eun‐Yeon Byeon; Heonsu Jeon; Jeong Hyun Kwon

doi:10.1002/adfm.202310268

journal article Dec 29, 2023

Highly Efficient and Reliable Organic Light–Emitting Diodes Enabled by a Multifunctional Hazy Substrate for Extreme Environments

Yongmin Jeon Takhee Lee Minwoo Nam Hyeongjun Lee Hyeunwoo Kim Sun‐Woo Lee Seung Jin Oh Seungyeop Choi

Jun‐Yeong Yang Sunghoon Jung

Seunghun Lee

Eun‐Yeon Byeon Heonsu Jeon

Jeong Hyun Kwon

Advanced Functional Materials Vol. 34 No. 18 · Wiley

View at Publisher Save 10.1002/adfm.202310268

Abstract

AbstractAs transparent, flexible, and wearable organic electronics degrade under normal outdoor environmental conditions (e.g., water vapor, oxygen, and UV light) and extreme environments, including washing or rain, a customized encapsulation technology is required to improve device reliability. Herein, a simple process is presented for fabricating multifunctional hazy substrates (MFHSs) with excellent gas diffusion barrier (GDB), flexibility, UV reflectance, light scattering, and waterproof properties. First, a spiky polyethylene terephthalate (PET) surface is produced with 76.0% optical haze through ion‐beam treatment followed by the formation of a hydrophobic layer to achieve a waterproof effect (contact angle: 153.3°). Then, a multifunctional multibarrier film is fabricated based on a nano‐laminated distributed Bragg reflector and functional polymer on the functional PET substrate to serve as a GDB and UV filter. This multibarrier film has excellent mechanical and chemical stabilities, in addition to having a water vapor transmission rate of 10−6 g m−2 day−1 and UV transmittance of <3%. The so‐fabricated MFHS not only increases the device efficiency by 73% but also enables a highly flexible and environmentally stable organic light–emitting diode. The surface treatment and encapsulation technologies developed in this study are expected to increase the lifetime of organic devices and facilitate high outdoor usability.

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Details

Published: Dec 29, 2023
Vol/Issue: 34(18)
License: View

Authors

Y

Yongmin Jeon

Department of Biomedical Engineering Gachon University Seongnam 13120 Republic of Korea

T

Takhee Lee

Department of Physics and Astronomy Seoul National University Seoul 08826 Republic of Korea

M

Minwoo Nam

School of Electrical Engineering Korea Advanced Institute of Science and Technology (KAIST) 291 Daehak‐ro Yuseong‐gu Daejeon 34141 Republic of Korea

H

Hyeongjun Lee

Department of Display and Semiconductor Engineering Sun Moon University Choongcheongnam‐do Asan 31460 Republic of Korea

H

Hyeunwoo Kim

Department of Display and Semiconductor Engineering Sun Moon University Choongcheongnam‐do Asan 31460 Republic of Korea

S

Sun‐Woo Lee

Department of Mechanical Engineering Korea Advanced Institute of Science and Technology (KAIST) 291 Daehak‐ro Yuseong‐gu Daejeon 34141 Republic of Korea

S

Seung Jin Oh

Department of Mechanical Engineering Korea Advanced Institute of Science and Technology (KAIST) 291 Daehak‐ro Yuseong‐gu Daejeon 34141 Republic of Korea

S

Seungyeop Choi

School of Electrical Engineering Korea Advanced Institute of Science and Technology (KAIST) 291 Daehak‐ro Yuseong‐gu Daejeon 34141 Republic of Korea

J

Jun‐Yeong Yang

Department of Nano‐Bio Convergence Korea Institute of Materials Science 797 Changwondae‐ro Changwon 51508 Republic of Korea

S

Sunghoon Jung

Department of Nano‐Bio Convergence Korea Institute of Materials Science 797 Changwondae‐ro Changwon 51508 Republic of Korea

S

Seunghun Lee

Department of Nano‐Bio Convergence Korea Institute of Materials Science 797 Changwondae‐ro Changwon 51508 Republic of Korea

E

Eun‐Yeon Byeon

Department of Nano‐Bio Convergence Korea Institute of Materials Science 797 Changwondae‐ro Changwon 51508 Republic of Korea

H

Heonsu Jeon

Department of Physics and Astronomy Seoul National University Seoul 08826 Republic of Korea

J

Jeong Hyun Kwon

Department of Display and Semiconductor Engineering Sun Moon University Choongcheongnam‐do Asan 31460 Republic of Korea; School of Electronics Engineering Chungbuk National University Cheongju 28644 Chungcheongbuhk‐do South Korea

Funding

National Research Foundation of Korea Award: 2022R1F1A1075914

Korea Technology and Information Promotion Agency for SMEs Award: 2022‐00164748

Korea Evaluation Institute of Industrial Technology Award: 20018379

Cite This Article

Yongmin Jeon, Takhee Lee, Minwoo Nam, et al. (2023). Highly Efficient and Reliable Organic Light–Emitting Diodes Enabled by a Multifunctional Hazy Substrate for Extreme Environments. Advanced Functional Materials, 34(18). https://doi.org/10.1002/adfm.202310268

Highly Efficient and Reliable Organic Light–Emitting Diodes Enabled by a Multifunctional Hazy Substrate for Extreme Environments

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