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Review of Organic/Inorganic Thin Film Encapsulation by Atomic Layer Deposition for a Flexible OLED Display

  • Application of Atomic Layer Deposition for Functional Nanomaterials
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Abstract

Recent trends in thin film encapsulations (TFEs), fabricating organic/inorganic encapsulation films are reviewed. Atomic layer deposited inorganic films have superior barrier performance and have advantages of excellent uniformity over large scales at relatively low deposition temperatures. However, organic film should be combined with a hybrid structure for improved flexibility and longer lag time. We introduce various organic deposition methods and mechanisms for enhancing barrier performance. However, stress engineering is required to achieve high performance TFEs for flexible devices, new materials and deposition methods. First, modulating the internal stress in TFEs should be considered to increase flexibility by adopting other layers that can reduce internal stress. Second, controlling the configuration of the hybrid structure can prevent degradation due to cracks. Third, the introduction of a neutral plane as the middle layer decreases the strain. The results summarize how the device can improve barrier performance under external stress. This paper can guide the improvements in barrier performance.

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Acknowledgements

This research was supported by the MOTIE (Ministry of Trade, Industry & Energy (#10080633) and KSRC (Korea Semiconductor Research Consortium) support program for the development of the future semiconductor device. And this work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (NRF-2017R1D1A1B03034035).

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  1. Seunghwan Lee and Ju-Hwan Han have contributed equally to this paper.

Authors and Affiliations

  1. Division of Materials Science and Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763, Republic of Korea

    Seunghwan Lee, Ju-Hwan Han, Seong-Hyeon Lee & Jin-Seong Park

  2. Division of Nano-Scale Semiconductor Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763, Republic of Korea

    Geon-Ho Baek & Jin-Seong Park

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  1. Seunghwan Lee
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Lee, S., Han, JH., Lee, SH. et al. Review of Organic/Inorganic Thin Film Encapsulation by Atomic Layer Deposition for a Flexible OLED Display. JOM 71, 197–211 (2019). https://doi.org/10.1007/s11837-018-3150-3

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