The fracture of brittle thin films on compliant substrates in flexible displays
One mechanical issue in flexible organic light emitting displays (OLED) is the fracture of extremely thin brittle conducting transparent oxide films deposited on thin flexible substrates. Understanding the behaviour of these films under flexed condition is essential for designer of flexible OLED. Co...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2012
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| Online Access: | https://hdl.handle.net/10356/94812 http://hdl.handle.net/10220/8160 |
| _version_ | 1826116670133895168 |
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| author | Chen, Zhong Cotterell, Brian Wang, Wei |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Chen, Zhong Cotterell, Brian Wang, Wei |
| author_sort | Chen, Zhong |
| collection | NTU |
| description | One mechanical issue in flexible organic light emitting displays (OLED) is the fracture of extremely thin brittle conducting transparent oxide films deposited on thin flexible substrates. Understanding the behaviour of these films under flexed condition is essential for designer of flexible OLED. Controlled buckling experiments on the film and substrate have been designed to study the fracture of the films under both tension and compression. Fracture of the film is superficially similar in both tension and compression. However, under tension a channelling crack is formed, while under compression, the film delaminates, buckles and cracks in a tunnelling motion. The fracture toughness of the film and the delamination toughness have been estimated from these experiments. Design to maximise the flexibility of the device is discussed. |
| first_indexed | 2024-10-01T04:15:30Z |
| format | Journal Article |
| id | ntu-10356/94812 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:15:30Z |
| publishDate | 2012 |
| record_format | dspace |
| spelling | ntu-10356/948122023-07-14T15:53:20Z The fracture of brittle thin films on compliant substrates in flexible displays Chen, Zhong Cotterell, Brian Wang, Wei School of Materials Science & Engineering DRNTU::Engineering::Materials One mechanical issue in flexible organic light emitting displays (OLED) is the fracture of extremely thin brittle conducting transparent oxide films deposited on thin flexible substrates. Understanding the behaviour of these films under flexed condition is essential for designer of flexible OLED. Controlled buckling experiments on the film and substrate have been designed to study the fracture of the films under both tension and compression. Fracture of the film is superficially similar in both tension and compression. However, under tension a channelling crack is formed, while under compression, the film delaminates, buckles and cracks in a tunnelling motion. The fracture toughness of the film and the delamination toughness have been estimated from these experiments. Design to maximise the flexibility of the device is discussed. Accepted version 2012-05-28T09:08:02Z 2019-12-06T19:02:45Z 2012-05-28T09:08:02Z 2019-12-06T19:02:45Z 2002 2002 Journal Article Chen, Z., Cotterell, B., & Wang, W. (2002). The Fracture of Brittle Thin Films on Compliant Substrates in Flexible Displays. Engineering Fracture Mechanics, 69(5), 597-603. https://hdl.handle.net/10356/94812 http://hdl.handle.net/10220/8160 10.1016/S0013-7944(01)00104-7 en Engineering fracture mechanics © 2002 Elsevier Science Ltd. This is the author created version of a work that has been peer reviewed and accepted for publication by Engineering Fracture Mechanics, Elsevier Science Ltd. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: DOI: [http://dx.doi.org/10.1016/S0013-7944(01)00104-7]. 17 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Materials Chen, Zhong Cotterell, Brian Wang, Wei The fracture of brittle thin films on compliant substrates in flexible displays |
| title | The fracture of brittle thin films on compliant substrates in flexible displays |
| title_full | The fracture of brittle thin films on compliant substrates in flexible displays |
| title_fullStr | The fracture of brittle thin films on compliant substrates in flexible displays |
| title_full_unstemmed | The fracture of brittle thin films on compliant substrates in flexible displays |
| title_short | The fracture of brittle thin films on compliant substrates in flexible displays |
| title_sort | fracture of brittle thin films on compliant substrates in flexible displays |
| topic | DRNTU::Engineering::Materials |
| url | https://hdl.handle.net/10356/94812 http://hdl.handle.net/10220/8160 |
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