Highly Efficient and Reliable Organic Light-Emitting Diodes Enabled by a Multifunctional Hazy Substrate for Extreme Environments
- Authors
- Jeon, Yongmin; Lee, Tae-Yun; Nam, Minwoo; Lee, Hyeongjun; Kim, Hyeunwoo; Lee, Sun-Woo; Oh, Seung Jin; Choi, Seungyeop; Yang, Jun-Yeong; Jung, Sunghoon; Lee, Seunghun; Byeon, Eun-Yeon; Kim, Taek-Soo; Jeon, Heonsu; Kwon, Jeong Hyun
- Issue Date
- May-2024
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- ALD nanolaminate; ion-beam; light extration effect; organic light-emitting diodes (OLED); polyethylene terephthalate (PET); wearable encapsulation
- Citation
- ADVANCED FUNCTIONAL MATERIALS, v.34, no.18
- Journal Title
- ADVANCED FUNCTIONAL MATERIALS
- Volume
- 34
- Number
- 18
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/92164
- DOI
- 10.1002/adfm.202310268
- ISSN
- 1616-301X
1616-3028
- Abstract
- As 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 degrees). 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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