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Park et al. Soft Sci 2024;4:28 Soft Science
DOI: 10.20517/ss.2024.22

Perspective Open Access

Towards the optimal design of optically clear

adhesives for flexible display

Youngjoo Park, Junkyu Kim, Daewhan Kim, Seokju Lee, Daihyun Hwang, Min Sang Kwon *
Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul
08826, Republic of Korea.

* Correspondence to: Prof. Min Sang Kwon, Department of Materials Science and Engineering, Research Institute of Advanced
Materials, Seoul National University, Gwanakro 1, Gwanakgu, Seoul 08826, Republic of Korea. E-mail: minsang@snu.ac.kr

How to cite this article: Park Y, Kim J, Kim D, Lee S, Hwang D, Kwon MS. Towards the optimal design of optically clear adhesives
for flexible display. Soft Sci 2024;4:28. https://dx.doi.org/10.20517/ss.2024.22

Received: 31 May 2024 First Decision: 17 Jun 2024 Revised: 2 Jul 2024 Accepted: 23 Jul 2024 Published: 31 Jul 2024

Academic Editor: YongAn Huang Copy Editor: Dong-Li Li Production Editor: Dong-Li Li

Abstract
As device form factors evolve towards increased complexity and flexibility, the role of adhesives within the display
module stack becomes increasingly crucial. These adhesives are essential for bonding functional layers with
minimal thickness while mitigating stress during the dynamic behavior of flexible devices. This paper offers a
comprehensive overview of the essential properties of adhesives - such as adhesion, viscoelasticity, optical
characteristics, and environmental reliability - necessary for the stable operation of flexible display devices across
diverse form factors and environments. In particular, it provides an in-depth look at ongoing research in simulation,
material selection, polymer network control, and the integration of new functionalities to achieve optimal
performance. Furthermore, this paper discusses extensive research outcomes addressing the growing demand for
sustainable solutions. Building on this knowledge, we highlight the future direction of adhesives for flexible displays.

Keywords: Flexible display, flexible adhesives, low modulus, viscoelastic property

INTRODUCTION
The advancement of information technology has transformed information exchange, enabling seamless
[1,2]
communication with realistic content, unrestricted by time or space . This shift has led users to favor
visual content, such as videos and images, for more accurate information transmission compared to text. As
a result, there is a rising demand for portable yet large displays, which has spurred the development of

© The Author(s) 2024. Open Access This article is licensed under a Creative Commons Attribution 4.0
International License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, sharing,
adaptation, distribution and reproduction in any medium or format, for any purpose, even commercially, as
long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and
indicate if changes were made.

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