Modeling of organic thin film field-effect transistors based on pentacene in saturation regime: Effect of light illumination

Mansouri, S.; Bourguiga, R.; Yakuphanoğlu, F.

doi:10.1016/j.microrel.2012.04.023

Cited by 13 publications

(3 citation statements)

References 38 publications

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“…There is conclusive evidence that optical band gaps are diminished by the distribution of states localised within the energy gap due to trapping the charge carriers [63]. The wide absorption edge shifting to lower photon energy (Figure 8) is close enough to those reported for inorganic and organic semiconductors.…”

Section: Resultssupporting

confidence: 70%

From Green Remediation to Polymer Hybrid Fabrication with Improved Optical Band Gaps

Brza

Aziz

Anuar

et al. 2019

IJMS

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The present work proposed a novel approach for transferring high-risk heavy metals tometal complexes via green chemistry remediation. The method of remediation of heavy metals developed in the present work is a great challenge for global environmental sciences and engineering because it is a totally environmentally friendly procedure in which black tea extract solution is used. The FTIR study indicates that black tea contains enough functional groups (OH and NH), polyphenols and conjugated double bonds. The synthesis of copper complex was confirmed by the UV-vis, XRD and FTIR spectroscopic studies. The XRD and FTIR analysis reveals the formation of complexation between Cu metal complexes and Poly (Vinyl Alcohol) (PVA) host matrix. The study of optical parameters indicates that PVA-based hybrids exhibit a small optical band gap, which is close to inorganic-based materials. It was noted that the absorption edge shifted to lower photon energy. When Cu metal complexes were added to PVA polymer, the refractive index was significantly tuned. The band gap shifts from 6.2 eV to 1.4 eV for PVA incorporated with 45 mL of Cu metal complexes. The nature of the electronic transition in hybrid materials was examined based on the Taucs model, while a close inspection of the optical dielectric loss was also performed in order to estimate the optical band gap. The obtained band gaps of the present work reveal that polymer hybrids with sufficient film-forming capability could be useful to overcome the drawbacks associated with conjugated polymers. Based on the XRD results and band gap values, the structure-property relationships were discussed in detail.

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Section: Resultssupporting

confidence: 70%

From Green Remediation to Polymer Hybrid Fabrication with Improved Optical Band Gaps

Brza

Aziz

Anuar

et al. 2019

IJMS

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“…For instance organic TFTs are sensitive to environment factors such as moisture, oxygen and other contaminants [7][8][9][10] and to light or UV exposure [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Effects of thermal and electrical stress on DH4T-based organic thin-film-transistors with PMMA gate dielectrics

Wrachien

Lago

Rizzo

et al. 2015

Microelectronics Reliability

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“…Throughout the literature, it has been confirmed that narrowed optical band gaps can be obtained by introducing localized levels inside the energy gap as a consequence of trapping charged species [ 64 ]. There is a similarity between this shifting and broadening of the absorption edge to a lower energy range, as in the current results, and those documented for organic and inorganic semiconductors.…”

Section: Resultsmentioning

confidence: 99%

Polymer Composites with 0.98 Transparencies and Small Optical Energy Band Gap Using a Promising Green Methodology: Structural and Optical Properties

et al. 2021

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In this work, a green approach was implemented to prepare polymer composites using polyvinyl alcohol polymer and the extract of black tea leaves (polyphenols) in a complex form with Co2+ ions. A range of techniques was used to characterize the Co2+ complex and polymer composite, such as Ultraviolet–visible (UV-Visible) spectroscopy, Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). The optical parameters of absorption edge, refractive index (n), dielectric properties including real and imaginary parts (εr, and εi) were also investigated. The FRIR and XRD spectra were used to examine the compatibility between the PVA polymer and Co2+-polyphenol complex. The extent of interaction was evidenced from the shifts and change in the intensity of the peaks. The relatively wide amorphous phase in PVA polymer increased upon insertion of the Co2+-polyphenol complex. The amorphous character of the Co2+ complex was emphasized with the appearance of a hump in the XRD pattern. From UV-Visible spectroscopy, the optical properties, such as absorption edge, refractive index (n), (εr), (εi), and bandgap energy (Eg) of parent PVA and composite films were specified. The Eg of PVA was lowered from 5.8 to 1.82 eV upon addition of 45 mL of Co2+-polyphenol complex. The N/m* was calculated from the optical dielectric function. Ultimately, various types of electronic transitions within the polymer composites were specified using Tauc’s method. The direct bandgap (DBG) treatment of polymer composites with a developed amorphous phase is fundamental for commercialization in optoelectronic devices.

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Modeling of organic thin film field-effect transistors based on pentacene in saturation regime: Effect of light illumination

Cited by 13 publications

References 38 publications

From Green Remediation to Polymer Hybrid Fabrication with Improved Optical Band Gaps

From Green Remediation to Polymer Hybrid Fabrication with Improved Optical Band Gaps

Effects of thermal and electrical stress on DH4T-based organic thin-film-transistors with PMMA gate dielectrics

Polymer Composites with 0.98 Transparencies and Small Optical Energy Band Gap Using a Promising Green Methodology: Structural and Optical Properties

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