Preparation and Characterization of Ito-Coated Colorless Polyimide Substrates

Lim, Hojun; Bae, Chulsung; Kim, Y.K.; Park, C.H.; Cho, W.J.; Ha, Cong-Tu

doi:10.1016/s0379-6779(02)00593-3

Cited by 11 publications

(4 citation statements)

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“…Table 1 shows the comparison of the optical transmission as well as the sheet resistance of the fluorinated polyimide substrate with those of our previous alicyclic PI substrate [4,10]. The optical transmission of the fluorinated polyimide (at the deposition temperature of 150˚C) was about 76% at the wavelength of 550 nm, which was higher that that of the alicyclic PI substrate (63 %).…”

Section: Discussionmentioning

confidence: 89%

“…It was mentioned that the synthesized aromatic PI substrate is optically colorless, transparent, and inactive, overcoming a major disadvantage of typical aromatic PI's as well as extending application fields [4,6]. These results are attributed to the minimization of the formation of the intra-and/or intermolecular charge transfer complex (CTC) in the PI molecules.…”

Section: Discussionmentioning

confidence: 99%

“…However, most aromatic PI's are highly colored polymers with colors ranging from yellow to brown, as well as poor processability and low solubility. Structural modification of PI's, therefore, has been attempted including the incorporation of flexible bridging units [2], bulky substituent groups [3], and aliphatic moieties [4] into the PI backbone.…”

Section: Introductionmentioning

confidence: 99%

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Polyimide as a Plastic Substrate for the Flexible Organic Electroluminescent Device

et al. 2004

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In this work, transparent flexible substrates based on polyimides(PI) with indium tin oxide (ITO) thin films for organic electroluminescent devices have been prepared. 2,2'-bis-(3,4-dicarboxyphenyl) hexafluoropropanedianhydride (6FDA) and 2,2'-bis-(trifluoromethyl)-4,4'-diaminobiphenyl (TFDB) PI films were used for transparent flexible substrates. ITO thin films were prepared at two substrate deposition temperatures of 25˚C and 150˚C with a typical radiofrequency (r.f.) planar magnetron sputtering system. The sheet resistance and the optical transmission properties of the fluorinated PI substrate were comparable with those for the slide glass substrate. The substrate properties are better when the deposition temperature is higher. SiO 2 coating onto the fluorinated PI substrate by sol-gel reaction was also attempted to improve the optical transmission of the ITO/PI substrate. It was found that the coating of SiO 2 affected on the morphology of the PI substrates.

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Section: Discussionmentioning

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Polyimide as a Plastic Substrate for the Flexible Organic Electroluminescent Device

et al. 2004

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“…However, to our knowledge, very few attempts have been carried out to deposit ITO on PI substrates. Lim et al . deposited ITO layers on the aliphatic cyclic PI substrate at different deposition temperatures with an RF magnetron sputtering system.…”

Section: Introductionmentioning

confidence: 99%

Transparent and conductive indium tin oxide/polyimide films prepared by high‐temperature radio‐frequency magnetron sputtering

Wen

Liu

Shen

et al. 2015

J of Applied Polymer Sci

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A highly transparent and thermally stable polyimide (PI) substrate was prepared and used for the fabrication of indium tin oxide (ITO)/PI films via radio-frequency magnetron sputtering at an elevated substrate temperature. The effect of the deposition conditions, that is, the oxygen flow rate, substrate temperature, sputtering power, and working pressure, on the optical and electrical properties of the ITO/PI films were investigated from the microstructural aspects. The results indicate that the optical and electrical properties of ITO were sensitive to the oxygen. Moreover, it was beneficial to the improvement of the ITO conductivity through the adoption of a high substrate temperature and sputtering power and a low working pressure in the deposition process. A two-step deposition method was developed in which a thick bulk ITO layer was overlapped by deposition on a thin seed ITO layer with a dense surface to prepare the highly transparent and conductive ITO/PI films. The ITO/PI film after annealing at 2408C gave a transmittance of 83% and a sheet resistance of 19.7 X/square.

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