Article
Chemistry, Physical
W. Hizi, H. Rahmouni, K. Khirouni, E. Dhahri
Summary: La0.9Sr0.1MnO3 nanoparticles were synthesized using the citrate-gel route, and the prepared sample exhibited rhombohedral symmetry. The electrical conductivity measurements revealed that transport properties are governed by hopping processes at different temperature ranges, and the thermal activation of charge-carriers was confirmed. The frequency dependence of the AC-conductivity obeyed the Double Jonscher Power Law in the temperature range [80-300 K], and a high frequency plateau was observed in the conductivity spectrum.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Zhiming Liang, Hyun Ho Choi, Xuyi Luo, Tuo Liu, Ashkan Abtahi, Uma Shantini Ramasamy, J. Andrew Hitron, Kyle N. Baustert, Jacob L. Hempel, Alex M. Boehm, Armin Ansary, Douglas R. Strachan, Jianguo Mei, Chad Risko, Vitaly Podzorov, Kenneth R. Graham
Summary: It has been shown through Seebeck coefficient and Hall effect measurements that mobile electrons play a significant role in charge-carrier transport in p-conjugated polymers heavily p-doped with strong electron acceptors. Doping with oxidizing agents eliminates the transport gap at high doping concentrations, indicating a promising route to high-performance n-type organic thermoelectric materials.
Article
Materials Science, Ceramics
Yiqian Jin, Xingyu Xiong, Guozheng Hao, Mengyuan Guo, Wangshu Hao, Jiaqi Sheng, Zhibin Yang, Suping Peng
Summary: A series of Ce-doped coatings (Mn1.5-xCo1.5-xCe2xO4+delta, x = 0, 0.025, 0.05, and 0.1) were prepared to improve the electrical conductivity of solid oxide fuel cell (SOFC) interconnect coatings. Experimental results showed that Ce doping effectively reduced the area-specific resistance of the coatings. However, excessive Ce doping led to more structural defects and weakened the oxidation resistance of the coatings.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Hajer Saadi, Othmen Khaldi, Tarek Larbi, Zohra Benzarti
Summary: This study investigates the impact of incorporating cobalt on various characteristics of ZnO nanoparticles. The results show that cobalt doping affects the crystallite size, optical properties, and dielectric properties, providing a comprehensive experimental and theoretical description of Co-doped ZnO nanoparticles.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Chemistry, Physical
Noubeil Guermat, Warda Daranfed, Idris Bouchama, Nadir Bouarissa
Summary: This study reports the preparation and characterization of zinc oxide thin films on glass substrates using spray pyrolysis technique. The effects of cobalt and nickel doping, as well as nickel/cobalt co-doping, on the properties of the films were investigated. The co-doped ZnO film with 3%Ni:3%Co showed potential for optoelectronic applications such as solar cell manufacturing with transparent electrodes.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Materials Science, Ceramics
H. Y. Hong, D. H. Kim, K. Park
Summary: In this study, the thermoelectric properties of Bi0.97Na0.03CuSeO were systematically investigated by doping Mg2+ ions. The Mg2+ doping significantly enhanced the electrical conductivity by increasing hole concentration and reducing phonon thermal conductivity. By improving the thermoelectric power factor and reducing the thermal conductivity, the thermoelectric performance of Bi0.97Na0.03CuSeO was significantly improved.
CERAMICS INTERNATIONAL
(2022)
Article
Physics, Multidisciplinary
Santosh Kumar, Deepika, Raju Kumar, Ritesh Kumar, Pratyush Vaibhav, Rajnish Kumar Singh, Nishant Kumar, Rakesh Kumar Singh, Seema Sharma
Summary: The study synthesized Zn0.90Co0.10O using the two-electrode electrodeposition method and investigated its structural, optical, and magnetic properties. The results confirmed the evolution of a single-phase polycrystalline hcp Wurtzite structure, with Co present in mixed 2+ and 3+ states, and good optical properties indicating potential for UV sensor applications. Intrinsic ferromagnetism at room temperature was also confirmed by VSM measurement.
CHINESE JOURNAL OF PHYSICS
(2021)
Article
Chemistry, Physical
Liwei Che, Jianmin Song, Jinzheng Yang, Xiaoyang Chen, Junjie Li, Nan Zhang, Shaopeng Yang, Yanfeng Wang
Summary: In this study, F, Cl, and Ga co-doped ZnO films were deposited on a glass substrate using the sol-gel spin-coating method. The effects of F-doping content on the structural, morphological, electrical, and optical properties of the films were investigated. The F, Cl, and Ga co-doped ZnO film with a doping ratio of 2% showed the best photoelectric performance, with high transmittance and a wide optical band gap.
JOURNAL OF MATERIOMICS
(2023)
Article
Chemistry, Inorganic & Nuclear
Faycal Bourguiba, Hend Kacem, Samia Nasr, M. Abassi, E. K. Hlil, J. Dhahri, K. Taibi, H. Belmabrouk
Summary: In this study, BaTiO3 ceramics doped with double cation couple (Fe3+, Mo6+) or (Fe3+, W6+) were fabricated, and the effects of dopants on the electrical and magnetic properties were systematically studied. The materials exhibited high dielectric constant and magnetism, with the contributions of microstructures and defects playing a critical role.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Engineering, Chemical
Zhipeng Sun, Zilu Liu, Changkun Cai, Hong Deng, Fan Yang, Yao Lu, Xiwen Song, Shengli An, Hailei Zhao
Summary: Novel cobalt-free perovskite-type oxides have been successfully prepared and characterized for their structural stability and oxygen permeability. The cubic perovskite-type structure can be stabilized at ambient temperature, but the oxygen permeation flux is slightly decreased. The substitution of titanium for partial iron enhances the stability of the membrane against different atmospheres, but reduces oxygen permeability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Aradhana Tiwari, P. P. Sahay
Summary: This paper presents the results of studying the microstructural, optical, and electrical characteristics of (Mg, Sn) co-doped ZnO films as a function of Mg and Sn dopant concentrations. It is found that doping and codoping can alter the crystallite size, surface roughness, transmittance, and electrical conductivity of the films. The Mg:Sn (1:1 at%) co-doped ZnO film shows the highest transmittance and electrical conductivity, making it a potential candidate for optoelectronic applications.
Article
Materials Science, Ceramics
B. J. Western, M. S. Harcrow, V. C. Lopes, A. J. Syllaios, U. Philipose, C. L. Littler, Sean Andrews, Tallis Chang, John Hong
Summary: Temperature dependent conductivity measurements on phosphine doped hydrogenated amorphous silicon revealed anomalous hopping conduction, with ln sigma proportional to T-p with p approximate to 0.75. Argon dilution affects dopant incorporation and defect formation, leading to anomalous conduction observed in this study. Raman spectroscopy provided additional evidence of structural changes in the silicon network.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Physics, Multidisciplinary
T. Garmim, E. Bouabdalli, L. Soussi, Z. El Jouad, R. Mghaiouini, A. Louardi, B. Hartiti, M. El Jouad, M. Monkade
Summary: In this study, (Ni, Mg) co-doped CdS thin films were synthesized using the spin coating method. The Mg incorporation caused an increase in grain size and changes in optical properties with increasing Mg concentration in Cd0.98Ni0.02S. The research also investigated optical parameters and changes in electrical resistivity and conductivity with varying Mg concentrations.
Article
Materials Science, Ceramics
S. S. Soumya, R. Vinodkumar, N. Unnikrishnan
Summary: This study discusses the structural, optical, and electrical properties of aluminum-doped tin oxide thin films prepared by sol-gel spin coating technique. Various analyses show that the films exhibit good characteristics in terms of structure, optical properties, and electrical conductivity. The conductivity type changes from n-type to p-type at higher aluminum doping concentrations.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
E. Asikuzun Tokeser, O. Ozturk
Summary: This study produced Zn1-xCu0.05MnxO polycrystalline nanoparticles with various compositions using sol-gel techniques. X-ray diffraction peak expansion analysis and magnetic analysis were used to study the crystal size and magnetic properties.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
E. Kutlu-Narin, P. Narin, A. Yildiz, S. B. Lisesivdin
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2020)
Article
Chemistry, Physical
Kenan Ozel, Abdullah Atilgan, Nur Efsan Koksal, Abdullah Yildiz
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Article
Physics, Condensed Matter
Nur Efsan Koksal, Mohamed Sbeta, Abdullah Atilgan, Abdullah Yildiz
Summary: The study presents a facile method to produce heterojunction diodes by depositing AGZO thin films on Si substrates and examines the impact of AGZO layer thickness on diode performances. While the thickness of AGZO has insignificant effects on structural, morphological, and optical properties, it can effectively enhance device characteristics. Diodes with 125 nm AGZO exhibit improved performance with remarkable rectification properties.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Energy & Fuels
Aycan Atli, Irem Sutcu, Z. Kerem Yildiz, Abdullah Yildiz
Summary: A simple deposition process was developed to fabricate dye-sensitized solar cells (DSSCs) with significantly improved power conversion efficiency by soaking the compact layer in a solution and preheating it. These results highlight the critical importance of deposition conditions for enhancing the performance of DSSCs.
IEEE JOURNAL OF PHOTOVOLTAICS
(2021)
Review
Chemistry, Multidisciplinary
Cesur Altinkaya, Erkan Aydin, Esma Ugur, Furkan H. Isikgor, Anand S. Subbiah, Michele De Bastiani, Jiang Liu, Aslihan Babayigit, Thomas G. Allen, Frederic Laquai, Abdullah Yildiz, Stefaan De Wolf
Summary: Tin oxide (SnO2) has emerged as a promising alternative to electron-selective layers (ESLs) in perovskite solar cells (PSCs), offering advantages such as high optical transmission, high carrier mobility, and low-temperature processability. It has the potential to play a key role in large-scale deployment and manufacturing.
ADVANCED MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
O. F. Goktas, N. E. Koksal, O. Kaplan, A. Yildiz
Summary: The sol-gel method was used to fabricate Al-doped ZnO (AZO) thin films on p-Si substrates with smooth surfaces and highly oriented crystal structures. The analysis revealed that the AZO/Si heterojunctions exhibited nonideal diode behavior, with the 80 nm thick AZO layer demonstrating good rectifying properties.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
E. Kutlu-Narin, P. Narin, A. Yildiz, S. B. Lisesivdin
Summary: The study looked at the effects of magnesium content and growth temperature on the optical and structural properties of magnesium zinc oxide films, finding a linear correlation between magnesium mole fraction and magnesium content in the liquid solution. The peak of the (0002) diffraction for the grown samples shifted to higher angles and became stronger with increasing magnesium content in the liquid solution. Both growth temperature and magnesium content in the liquid solution are crucial parameters in controlling the magnesium mole fraction of the samples.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Energy & Fuels
Yavuz Kocak, Abdullah Yildiz
Summary: Utilizing carminic acid as a photosensitizer in dye-sensitized solar cells showed promising results in terms of light absorption and surface anchoring, but the suppression of electron recombination was found to be inadequate. Quantum chemical calculations confirmed the compatibility of carminic acid with the conduction band edge of TiO2, leading to improved photo-conversion efficiency compared to natural dye-based DSSCs under simulated solar light.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Kenan Ozel, Abdullah Yildiz
Summary: The author proposed a novel design scheme by integrating a nanostructured SnO2 layer into the n-SnO2/p-Si heterojunction, resulting in devices with high photoresponsivity, quantum efficiency, and detectivity. These PDs possess self-powered characteristics and exhibit high performance for 311 nm wavelength without any power supply.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Abdullah Atilgan, Ahmet Yigit Kurtulus, Mehmet Fatih Oktem, Abdullah Yildiz
Summary: A simple method was employed to synthesize undoped and W-doped ZnO nanostructures, with temperature strongly affecting the structural, optical, and electrical properties of the films. Undoped NSs showed better performance based on transparency and sheet resistance values, and W-doped ZnO was found to be a promising transparent conducting oxide for various applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Kenan Ozel, Abdullah Yildiz
Summary: This study introduces a p-n heterojunction photodetector based on metal oxide materials, demonstrating efficient detection of UV-B light with high detectivity, responsivity, and UV/visible rejection ratio.
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Physical
Abdullah Yildiz, Takwa Chouki, Aycan Atli, Moussab Harb, Sammy W. Verbruggen, Rajeshreddy Ninakanti, Saim Emin
Summary: Transition metal phosphides, particularly the Fe2P phase, show comparable solar-to-current conversion efficiency with platinum (Pt) as a counter electrode in dye-sensitized solar cells (DSSCs) while exhibiting improved stability, making them a promising Pt-free alternative for efficient DSSCs.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Betul Sekertekin, Kenan Ozel, Abdullah Atilgan, Abdullah Yildiz
Summary: In this paper, a UV photodiode based on TiO2 nanorods has been successfully fabricated, showing superior UV detection capability. The presented fabrication approach can also be applied to other metal-oxide semiconductor optoelectronic devices.
Article
Chemistry, Physical
Veaceslav Sprincean, Liviu Leontie, Iuliana Caraman, Dumitru Untila, Mihaela Girtan, Silviu Gurlui, Petru Lisnic, Corneliu Doroftei, Aurelian Carlescu, Felicia Iacomi, Mihail Caraman
Summary: This study investigates the optical characteristics of micrometer-sized flexible InSe/In2O3 heterojunctions and suggests their potential for optoelectronic applications.
Article
Chemistry, Multidisciplinary
Luciana Punga, Abderrahman Abbassi, Mihaela Toma, Teodor Alupului, Corneliu Doroftei, Marius Dobromir, Daniel Timpu, Florica Doroftei, Laura Hrostea, George G. Rusu, Abdelati Razouk, Felicia Iacomi
Summary: Highly transparent BaSrMgWO6 thin films were deposited using spin coating, and their structure and optical properties were investigated after annealing at different temperatures. The films exhibited a nanocrystalline structure with impurity phases, and their optical band gap values were determined from transmittance measurements.
