One-photon absorption enhanced nonlinear absorption and optical limiting of the electrospun polyvinylpyrrolidone via excitation energy and incorporation of polypyrrole particles

Pepe, Yasemin; Akkoyun, Şerife; Bozkurt, Bedirhan; Karatay, Ahmet; Ateş, Aytunç; Elmalı, Ayhan

doi:10.1007/s10853-022-07948-5

Cited by 9 publications

(6 citation statements)

References 37 publications

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“…On the other hand, the more defective structure of PVP/MnO 2 -15 as compared to PVP/MnO 2 -12 composite nanofibers led to stronger NA behavior for PVP/MnO 2 -15 nanofibers. The effect of the defect states on the NA has been reported in our previous studies. − The NA coefficient values of reported studies are listed in Table to compare with the present report. The obtained NA coefficients of the PVP/MnO 2 composite nanofibers were higher than the values of reported studies in Table excited under similar experimental conditions.…”

Section: Resultssupporting

confidence: 60%

“…The effect of the defect states on the NA has been reported in our previous studies. 68 − 71 The NA coefficient values of reported studies are listed in Table 3 to compare with the present report. The obtained NA coefficients of the PVP/MnO 2 composite nanofibers were higher than the values of reported studies in Table 3 excited under similar experimental conditions.…”

Section: Resultsmentioning

confidence: 82%

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Investigation of the Defect and Intensity-Dependent Optical Limiting Performance of MnO₂ Nanoparticle-Filled Polyvinylpyrrolidone Composite Nanofibers

Pepe,

Akkoyun,

Asci

et al. 2023

ACS Omega

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To enhance the optical limiting behavior triggered by nonlinear absorption (NA), wide-band gap MnO 2 nanoparticles were incorporated into polyvinylpyrrolidone (PVP) polymer nanofibers at various concentrations. SEM images of the composite nanofibers showed that MnO 2 nanoparticles are well entrapped in the nanofibers. With an increase in MnO 2 nanofiller concentration, a widened optical band gap energy and an increased Urbach energy were observed. As the concentration of MnO 2 nanofiller in PVP increased, the NA behavior became more pronounced but weakened with higher input intensity. This behavior was attributed to the filling of the localized defect states by one photon absorption (OPA). The NA mechanisms of the composite nanofibers were examined, considering their band gap energies and localized defect states. Although all of the composite nanofibers had OPA, sequential/simultaneous two photon absorption (TPA), and excited state absorption mechanisms, the higher concentration of the MnO 2 nanofiller led to stronger NA behavior due to its more defective structure. The highest optical limiting behavior was observed for composite nanofibers with the highest concentration of MnO 2 nanofiller. The results obtained show that these composite nanofibers with a high linear transmittance and an extended band gap energy can be used in optoelectronic applications that can operate in a wide spectral range. Furthermore, their robust NA behavior, coupled with their promising optical limiting characteristics, positions them as strong contenders for effective optical limiting applications.

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Section: Resultssupporting

confidence: 60%

Section: Resultsmentioning

confidence: 82%

Investigation of the Defect and Intensity-Dependent Optical Limiting Performance of MnO₂ Nanoparticle-Filled Polyvinylpyrrolidone Composite Nanofibers

Pepe,

Akkoyun,

Asci

et al. 2023

ACS Omega

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“…This caused more NA mechanisms and enhanced the NA behavior. For comparison, the NA parameters from the reported studies ,,,, are tabulated in Table S4. The present composite nanofibers have NA coefficients higher than those of the listed studies except for PPy6-filled PVP (PVP/PPy6) nanofibers.…”

Section: Resultsmentioning

confidence: 99%

“…To maintain a specific level of lattice distortion, Fe and Co were chosen as dopants due to their ionic radii being compatible with Ni. In recent studies, it has been found that defect states related one photon absorption significantly strengthens nonlinear absorption. ,, A laser excitation wavelength of 532 nm was chosen to excite defect states with the OPA and TPA (sequential/genuine) mechanisms under various input intensities in open aperture (OA) Z-scan experiments. The NA mechanisms and optical limiting behaviors of the composite nanofibers were investigated.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Nonlinear Optical Limiter in the Visible Spectral Region Based on Fe- and Co-Doped NiO Nanoparticles within PVP Nanofibers

Pepe,

Tutel,

Akkoyun

et al. 2024

ACS Appl. Nano Mater.

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In this study, electrospun cobalt (Co)-and iron (Fe)doped nickel oxide (NiO) nanofilled polyvinylpyrrolidone (PVP) composite nanofibers were produced, and their linear and nonlinear optical and optical limiting properties were investigated. Three distinct average particle sizes (61, 110, and 150 nm) of Co-and Fe-doped NiO nanoparticles were produced using the coprecipitation method. Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD) techniques were used to analyze the morphology and structure of particles. Composite nanofibers were found to be homogeneous and continuous, with average diameters ranging from 177 to 314 nm. It was found that different particle sizes of Co-and Fedoped NiO nanoparticles and aggregations in nanofibers did not have a significant effect on the results. The Fe-doped structure mostly contained defect states and showed the weakest fluorescence emission among the other composite nanofibers. These behaviors indicate a further charge transfer mechanism via defect states, with multiphoton absorption favoring nonlinear absorption. Open aperture Z-scan experiments were carried out at 532 nm with a 4-ns pulsed laser to observe the nonlinear optical features of nanocomposite fibers. It was observed that all of the composite nanofibers exhibited a nonlinear absorption (NA) feature, which weakened with an increase in input intensity. The Fe-doped structure, characterized by more defect states, demonstrated the strongest NA behavior. All of the composite nanofibers displayed a strong optical limiting behavior within the range of 1.35 × 10 −5 and 1.92 × 10 −5 J/cm 2 . Given the strong NA and robust optical confinement behavior of Fe-doped NiO nanoparticles, composite nanofibers have emerged as promising candidates for optoelectronic applications in the visible spectral region.

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“…The tuning characteristics of the bandgap energy of NaBi(MoxW1-xO4)2 compounds provide a remarkable advantage for optoelectronic applications. Nonlinear optical behavior and nonlinear absorption mechanisms are strongly associated with the defects in the structure as well as bandgap energy of the materials [24][25][26][27][28]. The tail width of absorption band edge, known as the Urbach tail, is used to reveal the defects just below the conduction band using the following expression [29]…”

Section: Linear Absorption Analysismentioning

confidence: 99%

Tunable nonlinear absorption and optical limiting behavior of NaBi(Mo_xW_1−xO₄)₂ single crystals with ratio of Molybdenum/Tungsten

et al. 2023

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The compositional effect of Mo/W ratio on linear, nonlinear absorption and optical limiting behavior of the NaBi(MoxW1-xO4)2 single crystals grown by Czochralski technique was investigated. X-ray diffraction patterns of the studied crystals presented well-defined peaks associated with the tetragonal crystalline structure. The nonlinear absorption performance and optical limiting threshold were determined using an open-aperture Z-scan technique. A theoretical model including one photon absorption (OPA), two photon absorption (TPA) and free carrier absorption was used to determine the nonlinear absorption parameters. All of the results showed that defect states, which strongly affect nonlinear absorption (NA) and optical limiting behaviors, can be tuned with the Mo/W ratio, enabling NaBi(MoxW1-xO4)2 single crystals to be used in desired optoelectronic applications. Linear optical absorption analysis revealed that bandgap energy and defect states can be tuned by changing the Mo/W ratio in the crystal structure. The obtained results showed that all the studied crystals had NA behavior and the nonlinear absorption coefficient decreased with increasing Mo/W ratio. Sequential TPA is the main NA mechanism for these crystals due to the fact that the incident light energy is lower than the bandgap energies and the existence of the real intermediate state around 2.32 eV.

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One-photon absorption enhanced nonlinear absorption and optical limiting of the electrospun polyvinylpyrrolidone via excitation energy and incorporation of polypyrrole particles

Cited by 9 publications

References 37 publications

Investigation of the Defect and Intensity-Dependent Optical Limiting Performance of MnO₂ Nanoparticle-Filled Polyvinylpyrrolidone Composite Nanofibers

Investigation of the Defect and Intensity-Dependent Optical Limiting Performance of MnO₂ Nanoparticle-Filled Polyvinylpyrrolidone Composite Nanofibers

Enhanced Nonlinear Optical Limiter in the Visible Spectral Region Based on Fe- and Co-Doped NiO Nanoparticles within PVP Nanofibers

Tunable nonlinear absorption and optical limiting behavior of NaBi(Mo_xW_1−xO₄)₂ single crystals with ratio of Molybdenum/Tungsten

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One-photon absorption enhanced nonlinear absorption and optical limiting of the electrospun polyvinylpyrrolidone via excitation energy and incorporation of polypyrrole particles

Cited by 9 publications

References 37 publications

Investigation of the Defect and Intensity-Dependent Optical Limiting Performance of MnO2 Nanoparticle-Filled Polyvinylpyrrolidone Composite Nanofibers

Investigation of the Defect and Intensity-Dependent Optical Limiting Performance of MnO2 Nanoparticle-Filled Polyvinylpyrrolidone Composite Nanofibers

Enhanced Nonlinear Optical Limiter in the Visible Spectral Region Based on Fe- and Co-Doped NiO Nanoparticles within PVP Nanofibers

Tunable nonlinear absorption and optical limiting behavior of NaBi(MoxW1−xO4)2 single crystals with ratio of Molybdenum/Tungsten

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Investigation of the Defect and Intensity-Dependent Optical Limiting Performance of MnO₂ Nanoparticle-Filled Polyvinylpyrrolidone Composite Nanofibers

Investigation of the Defect and Intensity-Dependent Optical Limiting Performance of MnO₂ Nanoparticle-Filled Polyvinylpyrrolidone Composite Nanofibers

Tunable nonlinear absorption and optical limiting behavior of NaBi(Mo_xW_1−xO₄)₂ single crystals with ratio of Molybdenum/Tungsten