Highly Foldable, Super-Sensitive, and Transparent Nanocellulose/Ceramic/Polymer Cover Windows for Flexible OLED Displays

Xie，Jingyi1; Jia，Dongmei1; Dirican，Mahmut2; Xia，Yi4; Li，Chunxing1; Liu，Yi1; Cui，Meng1; Yan，Chaoyi2; Wan，Jiayu3; Liu，Hao1,5; Chen，Gang1; Zhang，Xiangwu2; Tao，Jinsong1,5

2022

10.1021/acsami.2c01353

ACS Applied Materials & Interfaces   影响因子和分区

1944-8244

1944-8252

Polymer cover windows are important components of flexible OLED displays but they easily generate wrinkles because of their weak folding resistance. Increasing the polymer thickness can improve the folding resistance but it decreases the touch sensitivity. Thus, fabricating highly foldable and supersensitive polymer cover windows is still challenging. Here, by incorporating cellulose nanocrystals (CNCs) and zirconia (ZrO2) into colorless polyimide (CPI), we developed a highly foldable and supersensitive hybrid cover window. Inspired by the theory of elasticity, we added rigid CNCs into CPI to improve the elastic modulus and hence the foldability. ZrO2 was introduced to improve dielectric properties, which leads to improved touch sensitivity. After these modifications, the elastic modulus of the cover windows was increased from 1432 to 2221 MPa, whereas its dielectric constant was increased from 2.95 to 3.46 (@1 × 106 Hz), resulting in significantly enhanced foldability and sensitivity. Meanwhile, because of the nano size of CNCs and ZrO2, the hybrid cover windows exhibit excellent optical properties with the transmittance of 88.1%@550 nm and haze of 2.39%. With improved and balanced mechanical, dielectric, and optical properties, these hybrid cover windows overcome current cover windows' defects and could be widely used in next-generation flexible displays.

cellulose nanocrystals colorless polyimide cover window flexible OLED displays zirconia

SCI ; EI

英语

其他

fund for the construction of Bengbu-SCUT Research Center for Advanced Manufacturing of Biomaterials[20210190] ; Project of Guangxi Innovation Drive Development Fund[AA18118013-9] ; Program of Climbing 100-Step Ladder of SCUT[j2tw2021020008] ; National Key Research and Development Program of China[2018YFC1902102]

Science & Technology - Other Topics ; Materials Science

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000800533100075

AMER CHEMICAL SOC

20221511961780

Cellulose ; Cellulose derivatives ; Dielectric properties ; Elastic moduli ; Flexible displays ; Nanocrystals ; Optical properties ; Organic light emitting diodes (OLED) ; Zirconia

Semiconductor Devices and Integrated Circuits:714.2 ; Computer Peripheral Equipment:722.2 ; Light/Optics:741.1 ; Nanotechnology:761 ; Inorganic Compounds:804.2 ; Cellulose, Lignin and Derivatives:811.3 ; Organic Polymers:815.1.1 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Crystalline Solids:933.1 ; Materials Science:951

2-s2.0-85127850344

Scopus

1.State Key Lab of Pulp and Paper Engineering,South China University of Technology,Guangzhou,510640,China
2.Fiber and Polymer Science Program,Department of Textile Engineering,Chemistry and Science,Wilson College of Textiles,North Carolina State University,Raleigh,27695-8301,United States
3.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China
4.The Key Laboratory of Advanced Functional Materials,Ministry of Education of China,Faculty of Materials and Manufacturing,Beijing University of Technology,Beijing,100124,China
5.Bengbu-SCUT Research Center for Advanced Manufacturing of Biomaterials,Bengbu,Anhui,233010,China

Xie，Jingyi,Jia，Dongmei,Dirican，Mahmut,et al. Highly Foldable, Super-Sensitive, and Transparent Nanocellulose/Ceramic/Polymer Cover Windows for Flexible OLED Displays[J]. ACS Applied Materials & Interfaces,2022,14(14):16658-16668.

Xie，Jingyi.,Jia，Dongmei.,Dirican，Mahmut.,Xia，Yi.,Li，Chunxing.,...&Tao，Jinsong.(2022).Highly Foldable, Super-Sensitive, and Transparent Nanocellulose/Ceramic/Polymer Cover Windows for Flexible OLED Displays.ACS Applied Materials & Interfaces,14(14),16658-16668.

Xie，Jingyi,et al."Highly Foldable, Super-Sensitive, and Transparent Nanocellulose/Ceramic/Polymer Cover Windows for Flexible OLED Displays".ACS Applied Materials & Interfaces 14.14(2022):16658-16668.