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Recent Submissions

EFFECT OF DIFFERENT MODELLING APPROACHES FOR SIMULATION OF ATMOSPHERIC PRESSURE GLOW DISCHARGES IN HELIUM
EYLENCEOĞLU, ENDER; Rafatov, İsmail; Islamov, Gubad; YEŞİL, CİHAN (2023-08-31)
EFFECT OF THE CATHODE SURFACE TEMPERATURE ON THE CATHODE FALL LAYER PARAMETERS
EYLENCEOĞLU, ENDER; Islamov, Gubad; Rafatov, İsmail (2023-08-31)
The effect of SiNx:H stoichiometry on electrical and chemical passivation of Al2O3/SiNx:H stack layer on p-type silicon wafers
Canar, Hasan Hüseyin; Bektaş, Gence; Keçeci, Ahmet Emin; Asav, Hasan; Bütüner, Sümeyye Koçak; Arlkan, Bülent; Turan, Raşit (2023-06-27)
In this paper, we report on the influence of SiNx:H stoichiometry on Al2O3/SiNx:H passivation stacks. We analyze the fabricated dielectric layers with four methods: FTIR, C-V, PCD and EQE. SiNx:H with a lower refractive in...
Silicon heterojunction solar cell efficiency improvement with wide optical band gap amorphous silicon carbide emitter
Salimi, Arghavan; Dönerçark, Ergi; Koç, Mehmet; Turan, Raşit (2023-06-27)
Boron doped hydrogenated amorphous silicon carbide (a-SiC:H) thin films are deposited by using 13.56 MHz plasma enhanced chemical vapor deposition as an emitter layer for SHJ solar cells. By changing different deposition p...
Optimization of front and rear surface dielectric passivation layers for ion implanted PERC solar cells
Bektaş, Gence; Canar, Hasan Hüseyin; Keçeci, Ahmet Emin; Asav, Hasan; Seyrek, Selin; Bütüner, Sümeyye Koçak; Turan, Raşit (2023-06-27)
Ion implantation is an alternative doping method providing a controlled emitter profile and manufacturing simplicity for PERC solar cells. SiNx:H and SiOxNy:H layers deposited by the PECVD system are common dielectric laye...
VULNERABILITY OF ECONOMIC SECTORS TO GEOMAGNETIC STORMS AND MITIGATION STRATEGIES
Demirköz, Melahat Bilge; Karagöz, G.; Kadloǧlu, Y.K.; Sözeri, H. (2023-04-21)
Solar storms and CMEs increase the amount of radiation that reaches the Earth and can perturb the magnetic shielding of the Earth. K and Kp indices quantify this perturbation by using magnetometers calibrated accordingly t...
Nanosecond Laser-Induced Micro-Modifications in Bulk of Crystal Silicon
Kadan, Viktor; Pavlova, Svitlana; Bek, Alpan; Aydin, Yavuz; Blonskyi, Ivan; Pavlov, Ihor (2023-01-01)
3D modifications of crystalline Si (c-Si) by nano-, pico-, or femtosecond lasers at 1550 nm-wavelength are under intensive studies nowadays due to the wide range of potential applications in photonics and optoelectronics [...
Propagation of Laguerre-Gaussian Modes at Millimeter-wave through Scattering Media
Dogru, Sebnem; Altan, Hakan; ŞAHİN, ASAF BEHZAT (2023-01-01)
This work consists of the generation of free-space Laguerre-Gaussian (LG) modes at millimeter-wave frequencies by use of a 3D-printed spiral phase plate and measuring the transmission capability of LG beams with respect to...
Fast and sensitive MMW imaging system with up-conversion readout working in the NIR Zone
Kurup, Arun Ramachandra; Rozban, Daniel; Kopeika, Natan S.; Yitzhaky, Yitzhak; Altan, Hakan; Abramovich, Amir (2023-01-01)
Focal plane arrays (FPA) constructed using glow discharge detectors (GDD) as the pixel elements proved to be an inexpensive methodology for generating MMW (millimeter wave)/THz (terahertz) images. In the abnormal glow mode...
Evaluation of performance of an active terahertz imaging system for concealed face recognition
Yıldırım, İhsan Ozan; Doğru, Şebnem; ŞAHİN, ASAF BEHZAT; Altan, Hakan (2023-01-01)
One of the most important problems encountered by face recognition systems is occlusions. Especially with the COVID-19 pandemic, recognition of masked faces has been attracting interest. There are proposed visible spectrum...
Zirconium Oxide As Electron-Selective Contacts For N-type Crystalline Silicon Solar Cells
Madbouly, Loay; Nasser, Hisham; Borra, Mona Zolfaghari; Çiftpınar, Emine Hande; Aliefendioğlu, Ateşcan; Canar, Hasan Hüseyin; Turan, Raşit; Ünalan, Hüsnü Emrah (2022-12-03)
Trends in AgriPV: Device physics and photonics perspectives
Yerci, Selçuk (2022-11-30)
Chaos in Matrix Gauge Theories with Massive Deformations
Başkan, K.; Kürkcüoğlu, Seçkin; Oktay, O.; Taşcı, Cankut (2022-11-23)
Starting from an SU(N) matrix quantum mechanics model with massive deformation terms and by introducing an ansatz configuration involving fuzzy four- and two-spheres with collective time dependence, we obtain a family of e...
Uses of Killing and Killing-Yano Tensors
Lindström, Ulf; Sarıoğlu, Bahtiyar Özgür (2022-11-23)
In this contribution we have collected some facts about Killing and Killing-Yano tensors that we feel are of general interest for researchers working on problems that rely on differential geometry. We also include some of ...
Jeomanyetik Fırtınalar, Gözlemevleri ve Ülkemizde Jeomanyetik KP İndisinin Hesaplanması
Demirköz, Melahat Bilge; KARAGÖZ, GÜLCE; KADIOĞLU, YUSUF KAĞAN; SÖZERİ, HÜSEYİN; ÖCAL, SULTAN EYLÜL (2022-11-18)
Empowering Photovoltaics via Smart Light Management Technologies
Yerci, Selçuk (2022-11-17)
Detection and recognition of concealed faces using a 340 GHz imaging system
YILDIRIM, İHSAN OZAN; ŞAHİN, ASAF BEHZAT; Altan, Hakan (2022-10-28)
Biometric recognition and surveillance systems based on visible band imaging cameras encounter a number of limitations such as the effects of lighting conditions and occlusions. As a result, there is an interest in beyond ...
Picometer-Resolution Single-Pixel Spectrometer Across Scattering Media
Kürekci, Şahin; Kahraman, S. Süleyman; Yüce, Emre (2022-09-09)
When light passes through a multimode fiber, two-dimensional random intensity patterns are formed due to the complex interference within the fiber. The extreme sensitivity of the speckle patterns to the frequency of lig...
Single-Pixel, Picometer Scale Spectral Characterization of Light Through Scattering Media
Kürekci, Şahin; Yüce, Emre (2022-09-07)
Nanoscale (sub-wavelength) imaging has various applications in nanostructures such as cells and biomolecules. Controlling the wavefront of light traveling through a scattering medium having sub-wavelength spatial modes may...
Passive Reconstruction of Sound through a Multi-Mode Fiber
Yüce, Emre (2022-09-05)
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