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Articles 26041 - 26070 of 26915
Full-Text Articles in Entire DC Network
Effect Of Low-Temperature Oxidation On The Properties Of Tivn/Vn Multilayer Coatings, Merve Ertaş Uslu, Özge Doğan, Leyla Çolakerol Arslan
Effect Of Low-Temperature Oxidation On The Properties Of Tivn/Vn Multilayer Coatings, Merve Ertaş Uslu, Özge Doğan, Leyla Çolakerol Arslan
Turkish Journal of Physics
An extensive study of the surface oxidation process on the properties of TiVN/VN multilayer coatings deposited by RF magnetron sputtering on Mg alloys was performed. TiVN/VN multilayer coatings with a total thickness of 660 nm and different layer numbers of 5, 11, and 33 were oxidized by annealing at 450K under partial oxygen pressure. Electronic, mechanical, and tribological properties of these coatings were characterized by X-ray photoelectron spectroscopy (XPS), scanning electron microscope, nanoindentation measurements, and scratch tester. The experimental results showed that the oxidation of TiVN/VN multilayer coatings leads to better performance in terms of surface roughness, hardness, and wear. …
The Influence Of Crosslinking Temperature On The Spectroscopic, Thermal, And Mechanical Properties Of Poly(Vinyl Alcohol)/Zeolite Composites, Cenk Denktaş
Turkish Journal of Physics
The aim of this study was to understand the effect of crosslinking temperature on the spectroscopic, thermal, and mechanical properties of poly(vinyl alcohol) (PVA)/zeolite composites. The PVA nanocomposite films were prepared using the solvent casting method with tartaric acid as the crosslinker. The changes in the structures of pure PVA film and powder clinoptilolite (CL) and nanocomposite films were analyzed by means of ATR-FTIR spectroscopy. The effect of both crosslinking temperature and CL on the composite films prepared by the addition of constant CL to the polymer matrix at different crosslinking temperatures (series II) and pure PVA films prepared with …
The Effect Of Phenylboronic Acid-Based Self-Assembled Monolayers On Theperformance Of Organic Field-Effect Transistors (Ofets), Tuğbahan Yilmaz Aliç
The Effect Of Phenylboronic Acid-Based Self-Assembled Monolayers On Theperformance Of Organic Field-Effect Transistors (Ofets), Tuğbahan Yilmaz Aliç
Turkish Journal of Physics
The dielectric/semiconductor interface is one of the most important components strongly affecting the performance of organic field-effect transistors (OFETs). To improve OFET parameters, we applied a series of phenylboronic acid derivatives as self-assembly molecules between dielectric and organic semiconductor layers. Device performance parameters, especially threshold voltage, current on/off ratio, and subthreshold slope, were improved. To elucidate the mechanism, dielectric/semiconductor interfaces were analyzed using atomic force microscope and contact angle techniques.
Nonlinear Frequency Conversion Of Light Inside A Microcavity, Emre Yüce
Nonlinear Frequency Conversion Of Light Inside A Microcavity, Emre Yüce
Turkish Journal of Physics
Changing the color of light in a small mode volume is essential for applications that require on-chip operation. Microcavities are profound structures given their property to confine light in a small mode volume. Here, I numerically investigate the frequency conversion of light in a microcavity and show that the frequency converted light intensity is distinguished from an open medium such as an optical fiber or a nonlinear crystal. I observe that the frequency converted light intensity increases with increased rate of change of the refractive index of the microcavity. Notably, this study shows that the intensity of the frequency converted …
Thin-Shell Wormholes From Kiselev Black Holes, Peter Kuhfittig
Thin-Shell Wormholes From Kiselev Black Holes, Peter Kuhfittig
Turkish Journal of Physics
This paper discusses the theoretical construction of thin-shell wormholes from Kiselev black holes. We assume a barotropic equation of state for the exotic matter on the shell. While most of these wormholes are unstable to linearized radial perturbations, a limit argument is used to show that under certain conditions, stable solutions can be found.
Synthesis, Characterization, And Magnetic Properties Of Nanosizedzn0.5co0.5erxfe2-Xo4 Prepared By Coprecipitation Method, Zouheir Bitar, Doaa El-Said Bakeer, Ramadan Awad
Synthesis, Characterization, And Magnetic Properties Of Nanosizedzn0.5co0.5erxfe2-Xo4 Prepared By Coprecipitation Method, Zouheir Bitar, Doaa El-Said Bakeer, Ramadan Awad
Turkish Journal of Physics
In the present work, the effect of doping zinc cobalt ferrite by different concentrations of Er3+ on structural, optical, and magnetic properties was studied. Nanosized Zn0.5Co0.5ErxFe2-xO4 (0 ≤ x ≤ 0.2) was synthesized by the coprecipitation method. XRD analysis confirmed the formation of one phase face FCC spinel structure belonging to the Fd3m space group. TEM exhibited that the particle size decreased with the increase of Er3+ content, which is in agreement with XRD results. Two significant absorption bands from FTIR spectra were observed between 400 and 600 cm-1. The band gap energy value obtained from UV-Vis increased with the …
Method For Determination Of Water Hammer Conditions And Consequences Inpressurizers Of Nuclear Reactors, Vladimir Skalozubov, Oleg Chulkin, Denis Pirkovskiy, Igor Kozlov, Yuriy Komarov
Method For Determination Of Water Hammer Conditions And Consequences Inpressurizers Of Nuclear Reactors, Vladimir Skalozubov, Oleg Chulkin, Denis Pirkovskiy, Igor Kozlov, Yuriy Komarov
Turkish Journal of Physics
Results of known experimental and computed studies of conditions for water hammers (WHs) in reactor pressurizers are analyzed. It is found that when emergency opening of pilot-operated safety valves of the pressurizers of nuclear reactors happens, WHs can be generated on pressurizer elements, and amplitudes of hydrodynamic load pulses significantly override the limiting values. An original method for determination of the WH conditions and consequences in the case of emergency filling of the pressurizers of nuclear reactors is proposed. Unlike the traditional Joukowski formula, the presented method considers the key features and effects of the WH conditions and consequences in …
Application Of The Fractional Oscillator Model To Describe Damped Vibrations, Sergo Rekhviashvili, Arsen Pskhu, Praveen Agarwal, Shilpi Jain
Application Of The Fractional Oscillator Model To Describe Damped Vibrations, Sergo Rekhviashvili, Arsen Pskhu, Praveen Agarwal, Shilpi Jain
Turkish Journal of Physics
We consider a model of damped vibrations based on fractional differentiation. The model given is completely consistent with the classical model of vibration with viscous damping. We find the relation between the order of fractional differentiation in the equation of motion and Q-factor of an oscillator. The proposed approach seems more appropriate for the physical nature of the described system. The experiment with a vibrating piezoelectric plate, performed as part of the study, showed good agreement with the model and confirmed that the fractional oscillator model can be used to describe strongly damped vibrations.
Comparison Of Geometric And Drive-Induced Nonlinearities In Doubly Clamped,Thermoelastic Nanoelectromechanical Systems, Mehmet Seli̇m Hanay
Comparison Of Geometric And Drive-Induced Nonlinearities In Doubly Clamped,Thermoelastic Nanoelectromechanical Systems, Mehmet Seli̇m Hanay
Turkish Journal of Physics
The performance of resonant sensors based on nanoelectromechanical systems depends critically on the maximum amplitude of oscillation reached in the linear regime. The maximum linear amplitude is determined by nonlinear mechanisms that can originate from the material, geometric and transduction mechanism related factors. Here we compare the two competing effects, the geometric and drive-induced nonlinearities, for a commonly used device family, the thermoelastically driven, doubly clamped beams. We find that the geometric nonlinearity dominates for most of the device designs used in the literature, however the drive-induced nonlinearity becomes the determining factor for thicker beams with small electrode lengths.
Localizable Entanglement Of Isotropic Antiferromagnetic Spin-1/2 Chain, İzzet Paruğ Duru, Şahi̇n Aktaş
Localizable Entanglement Of Isotropic Antiferromagnetic Spin-1/2 Chain, İzzet Paruğ Duru, Şahi̇n Aktaş
Turkish Journal of Physics
The bounds of entanglement on antiferromagnetic (AF) isotropic Heisenberg spin-1/2 chain including dipole- dipole interaction (D) were investigated. The Quantum Monte Carlo method based on loop algorithm was employed to calculate the two-spin and single-spin expectation values mediating the lower and upper bounds. It was revealed that D and Bz (the applied magnetic field) were pivotal parameters in controlling either entanglement creation/extinction or entanglement enhancement/weakening. Rival regions indicated a revival phenomenon depending on the temperature for various strengths of D which also showed a nonmonotonic behavior under certain Bz identifying critical points. Even if thermal agitations break the stability of …
Elaboration And Study Of Structural And Optical Properties Of Aubr Nanocrystalsdispersed In Kbr Single Crystals, Hanane Zaioune, Fouzia Zehani, Noureddine Boutaoui, Badis Khennaoui
Elaboration And Study Of Structural And Optical Properties Of Aubr Nanocrystalsdispersed In Kbr Single Crystals, Hanane Zaioune, Fouzia Zehani, Noureddine Boutaoui, Badis Khennaoui
Turkish Journal of Physics
The structural and optical properties of the AuBr nanocrystals embedded in the KBr single crystals grown by the Czochralski method were studied using several techniques. The X-ray diffraction reveals their formation and incorporation. The crystallite average radii calculated from XRD using the Scherrer's formula was found to vary between 19 and 39 nm. The photoluminescence spectra obtained on these same samples present an emission band located at 1.91 eV (650 nm), which can be attributed to the orange luminescence of AuBr nanocrystals. However, the photoluminescence excitation measurements of these nanocrystals exhibit an excitation band located at 3.44 eV (360 nm), …
Determination Of Fluence Rate Distribution In A Multilayered Skin Tissue Model Byusing Monte Carlo Simulations, Hali̇l Arslan, Bahar Pehli̇vanöz
Determination Of Fluence Rate Distribution In A Multilayered Skin Tissue Model Byusing Monte Carlo Simulations, Hali̇l Arslan, Bahar Pehli̇vanöz
Turkish Journal of Physics
Information on light-tissue interaction is important for clinical applications of lasers. The Monte Carlo technique is one of the commonly used methods to simulate photon propagation and to describe energy absorption in biological tissues. In this study, fluence rate distributions of 633 nm and 830 nm light inside a multilayered skin tissue model have been investigated by using two different simulation software programs: GAMOS tissue optics plug-in and MCML. Results of the plug-in for the fluence rate distributions are in very good agreement with the ones from MCML for both of the wavelengths. This shows that GAMOS tissue optics plug-in …
The Hirota-Satsuma Coupled Kdv Hierarchy On Noncommutative Phase-Space, Abdelali Saidi, Moulay Brahim Sedra
The Hirota-Satsuma Coupled Kdv Hierarchy On Noncommutative Phase-Space, Abdelali Saidi, Moulay Brahim Sedra
Turkish Journal of Physics
In the present contribution, the Hirota-Satsuma coupled KdV hierarchy on noncommutative phase-space is investigated using the noncommutative extension of Lax pair generating technique. In particular, the explicit representation of its associated Lax pair operators is constructed. It is shown that the obtained results for phase-space noncommutativity case reduce back to the standard commutative case when θ goes to ½.
The Ground State Of Pentaquarks With Cluster Structure In The Few-Body Systemapproach, Zari Binesh, Mohammad Reza Shojaei, Behnam Azadegan
The Ground State Of Pentaquarks With Cluster Structure In The Few-Body Systemapproach, Zari Binesh, Mohammad Reza Shojaei, Behnam Azadegan
Turkish Journal of Physics
In this study, an analytical model is presented based on the Nikiforov-Uvarov method for the Θ+ exotic KN resonance as a kind of pentaquark. The radial Schrödinger equation for the central Yukawa and modified Yukawa potentials was solved for Θ+ by use of the Nikiforov-Uvarov method. The energy eigenvalues and corresponding wave functions of Θ+ were obtained in terms of potential coefficients and n,l quantum numbers. Finally, the potential coefficients were determined according to the binding energy of Θ+ exotic KN resonance. The potentials and wave functions of Θ+ exotic KN resonance for different sets of potential coefficients are also …
The Novel Synthesis And Luminescence Studies Of Cuo And Fe2 O3 Embedded(8-Hydroxyquinoline)Zinc Nanocomposites, Abraham Kutticheril Eapen, Paulose Thomas
The Novel Synthesis And Luminescence Studies Of Cuo And Fe2 O3 Embedded(8-Hydroxyquinoline)Zinc Nanocomposites, Abraham Kutticheril Eapen, Paulose Thomas
Turkish Journal of Physics
The present study investigates the synthesis of novel luminescent polymer nanocomposite through the incorporation of CuO and Fe2 O3 into a C18 H12 N2 O2 Zn host polymer matrix. The observed green electroluminescence behavior originates mainly from the shift in the HOMO-LUMO energy gap of the polymer matrix caused by the inclusion of oxidized metal/oxygen ions from the incorporated metal oxides into the pyridyl and phenyl groups of the host polymer. The existence of oxidized metal/oxygen ionic states in the polymer matrix is successfully confirmed through X-ray photoelectron spectroscopic analysis. The FTIR analysis is utilized to verify the presence of …
Dispersive Parameters Of Oxidized Pva-Pvp Blend Films, Goputta Veena, Blaise Lobo
Dispersive Parameters Of Oxidized Pva-Pvp Blend Films, Goputta Veena, Blaise Lobo
Turkish Journal of Physics
Oxidized (ox) polyvinyl alcohol (PVA)-polyvinyl pyrrolidone (PVP) blend films were prepared by solution casting technique, with doping levels of the oxidizer, potassium permanganate (KMnO4) , varying from 0.01 up to 4.70 weight percent (wt.%). Optical (UV-Vis) spectral measurements in the wavelength range varying from 190 nm to 1000 nm were used to extract the band gap information and to calculate various optical parameters of the ox-PVA-PVP blend films. The electronic transitions on absorption of photons of suitable energy are of indirect allowed type. The corresponding optical band gap (Eg) has been determined. Optical dispersion parameters for ox-PVA-PVP films were determined …
Ab Initio Study Of Li2 Cata2 O7 Compound: Electronic And Optical Properties Forthree Phases, Murat Ayci̇bi̇n
Ab Initio Study Of Li2 Cata2 O7 Compound: Electronic And Optical Properties Forthree Phases, Murat Ayci̇bi̇n
Turkish Journal of Physics
The Li2 CaTa2 O7 compound belongs to the Ruddlesden-Popper family of layered perovskites. First principle approximation was used to investigate the electronic band structure and optical properties of the compound for three phases. Independent of the studied compound's structural type, Li2 CaTa2 O7 has semiconductor behavior and direct transition. In addition, the forbidden energy band gap of the compound decreases with rising temperature, as expected. Furthermore, the 3d orbital of Ca contributes to the conduction band due to the crystal field effect. Moreover, the optical response of the chosen axes of the compound to incoming electromagnetic rays varies with phase …
Modified Atomic Number Dependence Of Total Bremsstrahlung Spectra Incompounds, Suhansar Jit Sharma, Tajinder Singh, Doordarshi Singh, Amrit Singh, Amarjit Singh Dhaliwal
Modified Atomic Number Dependence Of Total Bremsstrahlung Spectra Incompounds, Suhansar Jit Sharma, Tajinder Singh, Doordarshi Singh, Amrit Singh, Amarjit Singh Dhaliwal
Turkish Journal of Physics
The total bremsstrahlung (BS) generated in compounds of BaCl2.2H2 O, CuCl2: 2H2O, Pb(CH3 COO)2.3H2O, PbCl2, Pb(NO3)2, and CuSO4.5H2 O by 90Sr was investigated using a Si(Li) detector to determine the dependence of the BS spectra on the modified atomic number (Zmod) of compounds in the photon energy range of 1-100 keV. A continuous decrease in the Zmod dependence of the bremsstrahlung spectra in the energy range of 1-30 keV was observed, followed by a slow increase thereafter, i.e. in the range of 30-100 keV. The stronger Zmod dependence of the spectra at low photon energy was expected to be the …
An Investigation Of Structural Properties And Surface Morphologies Ofelectrochemically Fabricated Nanocrystalline Ni-Co-Cu/Ito Deposits Withdifferent Compositions, Umut Saraç, Mevlana Celaletti̇n Baykul
An Investigation Of Structural Properties And Surface Morphologies Ofelectrochemically Fabricated Nanocrystalline Ni-Co-Cu/Ito Deposits Withdifferent Compositions, Umut Saraç, Mevlana Celaletti̇n Baykul
Turkish Journal of Physics
In this study, nanocrystalline ternary Ni-Co-Cu/ITO deposits with different compositions were produced by using the electrochemical deposition technique from a sulfate-based bath solution with different Co ion concentrations. It was revealed that an increment in the Co ion concentration gives rise to an enhancement in the Co content but leads to a decrement in the Ni and Cu contents of the deposit structure. The Co-Cu and Ni-Cu exhibited normal codeposition behavior, while the Co-Ni showed anomalous codeposition behavior irrespective of the bath concentration. The change in the degree of the anomalous codeposition was also investigated according to the Co ion …
Analytical Solution Of D-Dimensional Radial Schrödinger Equation For Sexticpotential By The Extended Nikiforov-Uvarov Method And Biconfluent Heunpolynomials, Hasi̇be Hale Karayer
Analytical Solution Of D-Dimensional Radial Schrödinger Equation For Sexticpotential By The Extended Nikiforov-Uvarov Method And Biconfluent Heunpolynomials, Hasi̇be Hale Karayer
Turkish Journal of Physics
D-dimensional radial Schrödinger equation (SE) for sextic potential is solved using the extended Nikiforov-Uvarov method analytically. Energy eigenvalue and eigenfunction solutions are achieved systematically. It is also presented that the D-dimensional radial SE is transformed to biconfluent Heun equation (BHE). Therefore the eigenfunction solutions for the potential are attained in terms of biconfluent Heun polynomials when the condition of existence of polynomial solution of BHE is provided simultaneously.
Pseudoscalar Higgs Boson Pair Production At A Photon-Photon Collision In Thetwo Higgs Doublet Model, Mehmet Demi̇rci̇
Pseudoscalar Higgs Boson Pair Production At A Photon-Photon Collision In Thetwo Higgs Doublet Model, Mehmet Demi̇rci̇
Turkish Journal of Physics
In this study, the direct pair production of the pseudoscalar Higgs boson at a γγ collision is analyzed in the context of the two Higgs doublet model (THDM), taking into account the complete one-loop contributions. In order to illustrate the effect of the new physics, four benchmark point scenarios, which are consistent with theoretical and current experimental constraints, are chosen in the type-I THDM with an exact alignment limit. The effect of individual contributions from each type of one-loop diagram on the total cross-section is examined in detail. The dependence of the cross-section on the center-of-mass energy is also presented …
First Photometric Investigation Of Some Asas Binary Systems, Burak Ulaş
First Photometric Investigation Of Some Asas Binary Systems, Burak Ulaş
Turkish Journal of Physics
We present the first light curve solutions of the four binary systems observed and catalogued by the All Sky Automated Survey (ASAS) program. The light curves are analyzed by using PHOEBE software, which is based on the Wilson?Devinney method. The light curve parameters are derived and the estimated physical parameters are calculated from the result of the analyses. We compare our targets to well-known binaries of similar type on the Hertzsprung-Russell diagram and mass-radius plane. The evolutionary states of the components are also discussed.
Topography Of Electrospun Nanofibers And Its Influence On (Pot/Ps)/Si Hybridsolar Cell Parameters, Tariq Jaffar Alwan
Topography Of Electrospun Nanofibers And Its Influence On (Pot/Ps)/Si Hybridsolar Cell Parameters, Tariq Jaffar Alwan
Turkish Journal of Physics
Alignment nanofibers of poly(o-toluidine)/polystyrene (POT/PS) were prepared by using an electrospinning method at different applied voltages (Vappl.) of 10, 15, and 20 kV. The effect of the applied voltage on the morphology and electrical properties of POT/PS nanofibers was studied. Morphology and diameters of the nanofibers were investigated via atomic force microscopy. (POT/PS)/Si hybrid solar cells were fabricated through the deposition of POT/PS nanofibers on Si wafers using the electrospinning technique. The current-voltage measurements of the device under dark conditions exhibited asymmetrical and rectifying behavior for the Al/(POT/PS)/Si/Al junction, thereby confirming the formation of diodes. Diode parameters, such as ideality …
The Behaviour Of The Diamagnetic Current Modified Mri In Different Rotationprofiles, Suzan Doğan
The Behaviour Of The Diamagnetic Current Modified Mri In Different Rotationprofiles, Suzan Doğan
Turkish Journal of Physics
Magnetohydrodynamic turbulence driven by magnetorotational instability (MRI) has been widely accepted as an efficient mechanism for transporting angular momentum radially outward in the discs. Previously, we have shown the triggering effect of the magnetization currents and the gradients produced by these currents on MRI for Keplerian discs. In this work, we examine the properties of the diamagnetic current modified MRI for the discs where the epicyclic frequencies deviate from Keplerian behaviour. We show that the diamagnetic effect modifies the instability both for an increasing and for a decreasing angular momentum with radius. The novel unstable region produced by magnetization effects …
Ab Initio Atomistic Thermodynamics Modeling Of Adsorption Of Oxygen On Goldand Gold-Silver Surfaces, Mehmet Gökhan Şensoy
Ab Initio Atomistic Thermodynamics Modeling Of Adsorption Of Oxygen On Goldand Gold-Silver Surfaces, Mehmet Gökhan Şensoy
Turkish Journal of Physics
A theoretical study of oxygen adsorption on gold and gold-silver surfaces by means of density functional theory (DFT) calculations with an atomistic thermodynamic model is performed. The (111) and (211) facets of gold and gold-silver alloy surfaces are considered, and their stabilization is discussed upon adsorption of oxygen depending on O and Ag coverage. The details of how the DFT-based atomistic thermodynamic model can apply to the transition metal surface are also presented in this work.
Two-Dimensional Ti2c Monolayer (Mxene): Surface Functionalization, Inducedmetal, Semiconductor Transition, Berna Akgenc
Two-Dimensional Ti2c Monolayer (Mxene): Surface Functionalization, Inducedmetal, Semiconductor Transition, Berna Akgenc
Turkish Journal of Physics
Recently, two-dimensional (2D) transition metal carbides and nitrides known as MXenes, have gained a lot of attention because of their tunable electronic and magnetic properties depending on surface functionalization. In the present work, the structural, electronic, and magnetic properties of both T and H phases of bare Ti2C and fully surface terminated Ti2 CT2 (T = -F, = O, -OH) are calculated using a set of first principles calculations. The ground state structures of Ti2 CT2 are computed in two and four different configurations for both H and T phases, respectively. We demonstrate that while H phase of Ti2C exhibits …
Quality Control Of Silicon Pixel Wafers For The Cms Phase-1 Pixel Upgrade, Kamuran Di̇lsi̇z, Süleyman Durgut, Kai Yi, Leonard Spiegel
Quality Control Of Silicon Pixel Wafers For The Cms Phase-1 Pixel Upgrade, Kamuran Di̇lsi̇z, Süleyman Durgut, Kai Yi, Leonard Spiegel
Turkish Journal of Physics
The CMS detector at the CERN Large Hadron Collider features as its innermost component a silicon pixel detector. The original pixel detector was completely replaced during the 2016-2017 winter technical stop. One of the goals of this Phase-1 Upgrade of the pixel detector was to replace the sensors in the original CMS forward pixel detector with new, unirradiated sensors. The new CMS forward pixel detector must survive an integrated luminosity of 300 fb$^{-1}$ before being replaced again prior to the High-Luminosity LHC era. Just as in the original construction, the Phase-1 forward pixel sensors were made of n$^{+}$-in-n Diffusion Oxygenated …
A Hard X-Ray Self-Amplified Spontaneous Emission Free-Electron Laser Optimization Using Evolutionary Algorithms For Dedicated User Applications, Di̇dem Ketenoğlu, Gazi̇ Erkan Bostanci, Ayhan Aydin, Bora Ketenoğlu
A Hard X-Ray Self-Amplified Spontaneous Emission Free-Electron Laser Optimization Using Evolutionary Algorithms For Dedicated User Applications, Di̇dem Ketenoğlu, Gazi̇ Erkan Bostanci, Ayhan Aydin, Bora Ketenoğlu
Turkish Journal of Physics
Accelerator-based fourth-generation light sources are utilized in a wide range of interdisciplinary applications such as nanotechnology, materials science, biosciences, and medicine. A hard X-ray free-electron laser (FEL), as a state-of-the-art light source, was optimized using evolutionary algorithms for dedicated user applications such as X-ray Raman scattering (XRS), resonant inelastic X-ray scattering (RIXS), and X-ray emission spectroscopies (XES). Optimal parameter sets were obtained for an in-vacuum planar undulator driven by an 8 GeV electron beam. Performance parameters of self-amplified spontaneous emission (SASE) operation (i.e. optimized SASE performance parameters through evolutionary algorithms) were found to be consistent with operating X-ray FEL facilities …
Fabrication And Characterization Of Si-Pin Photodiodes, Emre Doğanci, Şenol Kaya, Ali̇ekber Aktağ, Eli̇f Sarigül Duman, Raşi̇t Turan, Huseyi̇n Karacali̇, Ercan Yilmaz
Fabrication And Characterization Of Si-Pin Photodiodes, Emre Doğanci, Şenol Kaya, Ali̇ekber Aktağ, Eli̇f Sarigül Duman, Raşi̇t Turan, Huseyi̇n Karacali̇, Ercan Yilmaz
Turkish Journal of Physics
In this work, characteristics of silicon-based p$^{+\, }$type, intrinsic (I), n$^{-}$ type (Si-PIN) photodiodes with active area of 3.5 $\times $ 3.5 mm$^{2}$, 5.0 $\times $ 5.0 mm$^{2}$, or 7.0 $\times $ 7.0 mm$^{2}$ and their possible usage in optoelectronics were studied. The devices were fabricated in the Radiation Detector Application and Research Center (NÜRDAM) of Bolu Abant İzzet Baysal University, Turkey. To acquire the device specifications, the current-voltage (I-V) and the capacitance-voltage (C-V) measurements were carried out in the photoconductive mode. Quantum efficiency and spectral responsivity measurements were performed in the photovoltaic mode. Both measurements were carried out in …
Tuning The Electrical And Morphological Characteristics Of Pedot:Pss Films Through Mixed Cosolvent Addition And Performance Of Their Polymer Solar Cells, Çi̇sem Kirbiyik
Tuning The Electrical And Morphological Characteristics Of Pedot:Pss Films Through Mixed Cosolvent Addition And Performance Of Their Polymer Solar Cells, Çi̇sem Kirbiyik
Turkish Journal of Physics
This work aimed to reveal the influence of premixed cosolvent addition to low conductive PEDOT:PSS solution and how the optimized thin film conductivity develops. PEDOT:PSS thin films were obtained by addition of EG and MeOH cosolvent mixture (8, 10, and 15 v/v.%) and the morphological, electrical, optical, and bandgap properties of the films obtained were characterized by different techniques. The addition of mixed cosolvent can effectively control the grain size distribution and thus the conductivity. The optical characterization results revealed that the bandgap decreased with increasing volume of mixed cosolvent. The conductivity characteristics showed that the addition of 10% v/v.% …