Journal
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
Volume 49, Issue 9, Pages 638-648Publisher
WILEY
DOI: 10.1002/polb.22227
Keywords
flexible films; indium tin oxide (ITO); polyethylene naphthalate (PEN); polyethylene teraphthalate (PET); substrates
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Funding
- Regione Lazio Polo Solare Organico Regione Lazio
- MIUR
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Designing and developing flexible electronics requires a thorough investigation of the substrates available for the fabrication of devices. Here, we present a practical study on a variety of significant substrates: polyethylene terephthalate (PET), its heat-stabilized (HS) derivative, HS-PET, and polyethylene naphthalate (PEN) plastic insulating films; indium tin oxide (ITO)-coated ITO/PEN and ITO/PET transparent conducting films; rigid ITO/glass and FTO/glass substrates; stainless steel and titanium foils. We put the substrates through a range of tests these actually undergo during device fabrication to determine their optical, mechanical flexibility (under different types of tensile and compressive stress bending with and without a PEDOT:PSS conducting polymer layer), solvent resistance, stability to temperature treatment (conductivity and deformation), and to UV irradiation. We highlight issues and propose solutions to improve substrate response. The results and thresholds extracted reveal limitations and windows of opportunity useful for the designer of flexible optoelectronics in determining manufacturing processes and the final applications under everyday operation. (C) 2011 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 49: 638-648, 2011
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