Fabrication and Characterization of Amorphous Polyethylene Terephthalate Optical Waveguides

Iiyama, Koichi; Ishida, Toshimasa; Ono, Yuta; Minamikawa, Takeo; Yamagishi, Tada Aki

doi:10.1109/lpt.2010.2101058

Cited by 10 publications

(9 citation statements)

References 10 publications

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“…The diffraction peaks can be slightly shifted compared to the references or widened because of the defects. The average transmission of PET substrate is high (~90%) at wavelengths over 400 nm (Figure 4a), because the regular reflectance (R reg ) [58] at the interface PET/air is low, R reg = 0.049, considering the refractive index of PET, n PET = 1.57 [59]. The interference fringes situated in the NIR region are correlated with the interference phenomenon which appears inside the substrate.…”

Section: Resultsmentioning

confidence: 99%

Arylenevinylene Oligomer-Based Heterostructures on Flexible AZO Electrodes

et al. 2021

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We investigated the optical and electrical properties of flexible single and bi-layer organic heterostructures prepared by vacuum evaporation with a p-type layer of arylenevinylene oligomers, based on carbazole, 3,3′ bis(N hexylcarbazole)vinylbenzene = L13, or triphenylamine, 1,4 bis [4 (N,N’ diphenylamino)phenylvinyl] benzene = L78, and an n-type layer of 5,10,15,20-tetra(4-pyrydil)21H,23H-porphyne = TPyP. Transparent conductor films of Al-doped ZnO (AZO) with high transparency, >90% for wavelengths >400 nm, and low resistivity, between 6.9 × 10−4 Ω·cm and 23 × 10−4 Ω·cm, were deposited by pulsed laser deposition on flexible substrates of polyethylene terephthalate (PET). The properties of the heterostructures based on oligomers and zinc phthalocyanine (ZnPc) were compared, emphasizing the effect of the surface morphology. The measurements revealed a good absorption in the visible range of the PET/AZO/arylenevinylene oligomer/TPyP heterostructures and a typical injection contact behavior with linear (ZnPc, L78) or non-linear (L13) J-V characteristics in the dark, at voltages <0.4 V. The heterostructure PET/AZO/L78/TPyP/Al showed a current density of ~1 mA/cm2 at a voltage of 0.3 V. The correlation between the roughness exponent, evaluated from the height-height correlation function, grain shape, and electrical behavior was analyzed. Consequently, the oligomer based on triphenylamine could be a promising replacement of donor ZnPc in flexible electronic applications.

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Section: Resultsmentioning

confidence: 99%

Arylenevinylene Oligomer-Based Heterostructures on Flexible AZO Electrodes

et al. 2021

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“…[1][2][3][4] Organic polymers, including poly(methyl methacrylate), polyethylene terephthalate, and poly(carbonate), possess excellent optical transparency in the visible wavelength, and thus, are used as materials for a variety of optical components. 5,6 However, these polymers do not have sufficient thermal stability for the device fabrication at high temperature. It is known that polyimides (PIs) exhibit a number of outstanding properties such as excellent thermal stability in air, solvent resistance, and mechanical and electrical properties, and PIs have been investigated as optical materials for a long time.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and properties of (A₂+B₄)-type hyperbranched polyimides with different terminal groups

Liu

Zhu

Wang

et al. 2016

High Performance Polymers

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To investigate the effect of terminal groups on the properties of hyperbranched polyimides (HBPIs) for potential optical applications, a series of HBPIs bearing different terminal groups have been synthesized through a novel aromatic CF 3 -containing tetra-amine, 4,4 0 -di[3,5-di(2-trifluoromethyl-4-aminophenoxy)phenoxy] sulfone, and a long chain dianhydride, 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]hexafluoropropane, via a two-step polycondensation procedure. The synthesized HBPIs could form flexible and tough polyimide (PI) films, which exhibit good thermal stability with the glass transition temperatures of 191-234 C for differential scanning calorimetry measurement, the 5% weight loss temperatures of 533-610 C, and residual weights of 45.8-58.6% at 800 C under nitrogen atmosphere. The PI films have favorable mechanical properties with tensile strengths of 77-92 MPa, elongation at break of 3.55-7.99%, and initial modulus of 2.05-2.86 GPa. The films also exhibit the good transmittance of higher than 80% at 800 nm. The average refractive indices (n av ) and in-plane/outof-plane birefringence (Án) measured at 632.8 nm are in the range of 1.5539-1.6022 and 0.0065-0.0077, respectively. The good transmittance in the visible region, tunable n av , and low Án are very suitable for optical applications.

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“…In particular, they provide a simple and relatively cheap technology applicable for production of big size units. For example, thin polymers films are well suited for formation of the plane waveguides of micrometer thickness [1]- [5]. In most cases, the polymer waveguides are formed by trivial methods extrusion, or by spin-coating process [4].…”

Section: Introductionmentioning

confidence: 99%

“…For example, thin polymers films are well suited for formation of the plane waveguides of micrometer thickness [1]- [5]. In most cases, the polymer waveguides are formed by trivial methods extrusion, or by spin-coating process [4]. It is necessary in these cases to provide the lower value of a refractive index (RI) in the cladding part of a waveguide with the value of the RI in the central part (the core of a waveguide).…”

Section: Introductionmentioning

confidence: 99%