Transparent conductive film by large area roll-to-roll processing
Sputtered indium tin oxide (ITO) coating on polyethylene terephthalate film has been used as the substrate for roll-to-roll fabrication of large area printed electronics devices, but it is expensive and could be cracked when bending, limiting its applications. Transparent conductive (TC) electrode m...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2013
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| Online Access: | https://hdl.handle.net/10356/107201 http://hdl.handle.net/10220/17909 |
| _version_ | 1811689188759699456 |
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| author | Wu, Linda Y. L. Kerk, W. T. Wong, C. C. |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Wu, Linda Y. L. Kerk, W. T. Wong, C. C. |
| author_sort | Wu, Linda Y. L. |
| collection | NTU |
| description | Sputtered indium tin oxide (ITO) coating on polyethylene terephthalate film has been used as the substrate for roll-to-roll fabrication of large area printed electronics devices, but it is expensive and could be cracked when bending, limiting its applications. Transparent conductive (TC) electrode made by roll-to-roll coating of transparent conductive ink on flexible substrate is an alternative, but both the ink material and the control of the coating quality are very crucial. The major challenges are the coating performance, coating uniformity and defect control during roll-to-roll processing. In this paper, we report the chemical synthesis of silver nanowires in preferred shape and size, the surface modification of the Ag nanowires for better dispersion into the commercial Poly(3,4-ethylenedioxythiophene) Poly(styrenesulfonate) (PEDOT:PSS) conductive polymer ink, and the controlled roll-to-roll coating process on flexible polyethylene terephthalate substrate by a one meter web-width roll-to-roll slot die coating system. We obtained high uniformity PEDOT:PSS coating with optical transmission higher than 80% and sheet resistance lower than 100 Ω/square, and silver containing coating with sheet resistance below 40 Ω/square and maintained optical transmittance. The slot die coating mechanism is investigated and the influencing factors for coating uniformity and defect are defined. The coated transparent conductive film has the same properties as the sputtered ITO and has been used as the TC electrode for printed lighting, whose performance has been proven by standard weathering test for 1000 h. |
| first_indexed | 2024-10-01T05:44:08Z |
| format | Journal Article |
| id | ntu-10356/107201 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:44:08Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/1072012020-06-01T10:26:43Z Transparent conductive film by large area roll-to-roll processing Wu, Linda Y. L. Kerk, W. T. Wong, C. C. School of Materials Science & Engineering A*STAR SIMTech DRNTU::Engineering::Materials Sputtered indium tin oxide (ITO) coating on polyethylene terephthalate film has been used as the substrate for roll-to-roll fabrication of large area printed electronics devices, but it is expensive and could be cracked when bending, limiting its applications. Transparent conductive (TC) electrode made by roll-to-roll coating of transparent conductive ink on flexible substrate is an alternative, but both the ink material and the control of the coating quality are very crucial. The major challenges are the coating performance, coating uniformity and defect control during roll-to-roll processing. In this paper, we report the chemical synthesis of silver nanowires in preferred shape and size, the surface modification of the Ag nanowires for better dispersion into the commercial Poly(3,4-ethylenedioxythiophene) Poly(styrenesulfonate) (PEDOT:PSS) conductive polymer ink, and the controlled roll-to-roll coating process on flexible polyethylene terephthalate substrate by a one meter web-width roll-to-roll slot die coating system. We obtained high uniformity PEDOT:PSS coating with optical transmission higher than 80% and sheet resistance lower than 100 Ω/square, and silver containing coating with sheet resistance below 40 Ω/square and maintained optical transmittance. The slot die coating mechanism is investigated and the influencing factors for coating uniformity and defect are defined. The coated transparent conductive film has the same properties as the sputtered ITO and has been used as the TC electrode for printed lighting, whose performance has been proven by standard weathering test for 1000 h. 2013-11-29T04:29:02Z 2019-12-06T22:26:35Z 2013-11-29T04:29:02Z 2019-12-06T22:26:35Z 2013 2013 Journal Article Wu, L. Y.L., Kerk, W.T., & Wong, C.C. (2013). Transparent conductive film by large area roll-to-roll processing. Thin solid films, 544, 427-432. 0040-6090 https://hdl.handle.net/10356/107201 http://hdl.handle.net/10220/17909 10.1016/j.tsf.2013.02.087 en Thin solid films |
| spellingShingle | DRNTU::Engineering::Materials Wu, Linda Y. L. Kerk, W. T. Wong, C. C. Transparent conductive film by large area roll-to-roll processing |
| title | Transparent conductive film by large area roll-to-roll processing |
| title_full | Transparent conductive film by large area roll-to-roll processing |
| title_fullStr | Transparent conductive film by large area roll-to-roll processing |
| title_full_unstemmed | Transparent conductive film by large area roll-to-roll processing |
| title_short | Transparent conductive film by large area roll-to-roll processing |
| title_sort | transparent conductive film by large area roll to roll processing |
| topic | DRNTU::Engineering::Materials |
| url | https://hdl.handle.net/10356/107201 http://hdl.handle.net/10220/17909 |
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