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Recent Submissions

Interfacial modification by 2-fluoroisonicotinic acid enabling high-efficiency and stable n-i-p perovskite solar cells Sun, Lei; Zhang, Chu; Bektaş, Gence; Li, Xiaowei; Ma, Chunying; Ma, Tingli (2024-12-01) The power conversion efficiency (PCE) of organic-inorganic halide perovskite solar cells (PSCs) developed rapidly in recent years. However, the defects at the bulk grain boundaries and heterojunction interfaces acting as n...
Unveiling the application potential of PbMo0.75W0.25O4 crystal: Linear and nonlinear optical properties through ellipsometry Isik, M.; Hasanlı, Nızamı (2024-12-01) PbMo0.75W0.25O4 compound is formed by replacing one quarter of the Mo atoms in the PbMoO4 with W atoms and has significant potential for optoelectronic applications. Optical properties of PbMo0.75W0.25O4 single crystal hav...
Single-beam low-frequency loss modulation technique for two-photon absorption measurement Kadan, Viktor; Pavlov, Ihor; Dmytruk, Andriy; Blonskyi, Ivan; Pavlova, Tetiana; Serozhkin, Yuriy; Goodarzi, Arian; Bondar, Mykhailo (2024-10-15) We present a straightforward and reliable single-beam configuration designed for the assessment of two-photon absorption (2PA) through the utilization of the loss modulation technique. Mechanical rotation of a half-wave pl...
Exploring Temperature-Dependent bandgap and Urbach energies in CdTe thin films for optoelectronic applications Surucu, O.; SÜRÜCÜ, GÖKHAN; Hasanlı, Nızamı; Parlak, Mehmet; Isik, M. (2024-10-15) This study examines CdTe thin films deposited via RF magnetron sputtering, focusing on structural and optical properties. X-ray diffraction, Raman spectroscopy, and SEM assessed structural characteristics. Optical properti...
Constraints and time evolution in generic f(Riemann) gravity Altas, Emel; Tekin, Bayram (2024-10-11) We give a detailed canonical analysis of the n-dimensional f(Riemann) gravity, correcting the earlier results in the literature. We also write the field equations in the Fischer-Marsden form which is amenable to identifyin...
A quantal diffusion approach for multinucleon transfer in heavy-ion collisions Kayaalp, A.; Arık, Mert; Ocal, S.E.; Yılmaz, Osman; Umar, A.S. (2024-10-01) The stochastic mean-field (SMF) approach beyond the time-dependent-Hartree-Fock theory is used to explore the primary production cross sections in Ni64+130Te at the bombarding energy Ec.m.=184.3 MeV and Pb206+118Sn at Ec.m...
A statistical analysis of atmospheric parameters for cataloged astronomical observatory sites Kurt, Zühal; Yerli, Sinan Kaan; AKSAKER, NAZIM; AKTAY, ALİŞAN; ERDOĞAN, MEHMET AKİF (2024-10-01) Astronomical sites have to be selected according to many factors whereas the geographic location of the site and the quality of the atmosphere above the site play an important role in the decision process. The following fa...
Astronomical site selection for Antarctica with astro-meteorological parameters Aksaker, Nazim; Bayazit, M.; Kurt, Z.; Yerli, Sinan Kaan; Aktay, Alişan; Erdoğan, Mehmet Akif (2024-10-01) The primary objective of this study is to employ Multi-Criteria Decision Analysis (MCDA) and Geographical Information System (GIS) techniques to identify and assess potential sites for astronomical observations in Antarcti...
Identification of shallow trap centers in InSe single crystals and investigation of their distribution: A thermally stimulated current spectroscopy Isik, M.; Hasanlı, Nızamı (2024-10-01) Identification of trap centers in semiconductors takes great importance for improving the performance of electronic and optoelectronic devices. In the present study, we employed the thermally stimulated current (TSC) metho...
Hydrogen thermal activation of defects enabling firing stable Poly-Si based passivating contacts for TOPCon solar cells Uygun, Berkay; Altiner, Gokhan; Hande Ciftpinar, E.; Mert Kaplan, Y.; Huseyin Canar, H.; Turan, Raşit; Nasser, Hisham (2024-09-01) Passivating contacts based on poly-Si/SiOx also referred to as TOPCon (tunnel oxide passivated contacts) have substantially improved the performance of crystalline silicon (c-Si) solar cells. Hydrogenation in TOPCon has th...
Development of a selective wet-chemical etchant for precise 3D sculpting of silicon enabled by infrared non-linear laser modification Zolfaghari Borra, Mona; Radfar, Behrad; Nasser, Hisham; Çolakoğlu, Tahir; Tokel, Onur; Turnalı, Ahmet; Işık Taşgın, Dilek; Toffoli, Hande; Toffoli, Daniele; İlday, Fatih Ömer; Turan, Raşit; Pavlov, Ihor; Bek, Alpan (2024-09-01) Recently-demonstrated high-quality three-dimensional (3D) subsurface laser processing inside crystalline silicon (c-Si) wafers opens a door to a wide range of novel applications in multidisciplinary research areas. Using t...
Optical characterization of NaBi(MoO4)2 crystal by spectroscopic ellipsometry Guler, I.; Isik, M.; Hasanlı, Nızamı (2024-09-01) The compound NaBi(MoO4)2 has garnered significant interest in optoelectronic fields. This study employs spectroscopic ellipsometry to thoroughly examine the linear and nonlinear optical characteristics of NaBi(MoO4)2 cryst...
Development of Polarization-Insensitive THz-to-IR Converters for Low-IR-Signature Target Detection and Imaging Aytaç, Berat; ŞAHİN, ASAF BEHZAT; Altan, Hakan (2024-09-01) A THz-to-IR converter can be an effective solution for the detection of low-IR-signature targets by combining the advantages of mature IR detection mechanisms with high atmospheric transmittance in the THz region. A metall...
Photovoltaic Response of Liquid Phase Exfoliated Graphene - MoS2 Heterostructures Javaid, Asad; Karamat, Shumaila; Khalique, Uzma; Naseer, Hisham; Sharif, Parisa; Oral, Ahmet; Akram, Rizwan (2024-08-15) This work reports the utilization of a simple liquid exfoliation technique to synthesize graphene and MoS2 layers and their subsequent integration in a multilayer heterostructure device with a photovoltaic response. XRD di...
Spin-spin interactions in general relativity versus linearized massive gravity: N -body simulations Gulmez, Eren; Tekin, Bayram (2024-08-15) We simulated spin-spin interactions of N-bodies in linearized general relativity (GR) and linearized massive gravity of the Fierz-Pauli type (mGR). It was noted earlier that there is a discrete difference between the spin-...
Influence of boron doping profile on emitter and metal contact recombination for n-PERT silicon solar cells Bektaş, Gence; Aslan, Sercan; Keçeci, Ahmet Emin; Özyahni, Vahdet; Canar, Hasan Hüseyin; Asav, Hasan; Seyrek, Selin; Verlinden, Pierre J.; Turan, Raşit (2024-08-01) Increasing interest in n-type silicon (Si) solar cells due to the high-quality material properties of the n-Si wafers, their relatively low sensitivity to donor-like impurities like iron and their resistance to light-induc...
Analysis of strong decays of SU(3) partners of Ω(2012) baryon Alıyev, Tahmasıb; Bilmiş, Selçuk; Savcı, Mustafa (2024-08-01) We estimate the coupling constants and decay widths of the SU(3) partners of the Omega(2012) hyperon, as discovered by the BELLE Collaboration, using the distribution amplitudes of the octet baryons within the light cone s...
Impact of COVID-19 on student performance in a physics laboratory course Güler, Ali Murat; Bilgin, Berrin (2024-08-01) This study examines the change in students' performance in a physics laboratory course between distance education and face-to-face education periods before, during, and after the pandemic. It fills a gap in the literature ...
Category-theoretic formulation of relational materialism Baytaş, Bekir; Derin, Ozan Ekin (2024-08-01) This brief brochure is intended to present a philosophical theory known as relational materialism. We introduce the postulates and principles of the theory, articulating its ontological and epistemological content using th...
Revealing the Effects of Defect States on the Nonlinear Absorption Properties of the TlInsse and Tl2In2S3Se Crystals in Near-Infrared Optical Limiting Applications Doğan, Anıl; KARATAY, AHMET; Isik, Mehmet; YILDIZ, ELİF; Hasanlı, Nızamı; ELMALI, AYHAN (2024-08-01) The present study represents the effect of defect states on the nonlinear absorption and optical limiting performances of TlInSSe and Tl2In2S3Se single crystals with near-infrared excitations. The band gap energies were 2....

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