PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE

Zahra El Hafidi, Naima Outaleb, Hassan Mabrak, Wadiae El Bahrami et al.

Lead‐free perovskite solar cells (PSCs) offer a sustainable alternative to lead‐based devices while maintaining high photovoltaic performance. In this study, CH ₃ NH ₃ SnI ₃ is used as the perovskite absorber, with zinc oxide (ZnO) as the electron transport layer (ETL) and copper oxide (CuO) as the hole transport layer (HTL). Simulations using SCAPS‐1D (Solar Cell Capa…

Masahira Onoue, Yoshifuru Mitsui, Ryota Kobayashi, Keiichi Koyama

The decomposition behavior of Sm ₂ Fe ₁₇ N ₃ was investigated under flowing and static high‐purity oxygen with and without an applied magnetic field of 5 T. Under flowing oxygen at 100 Pa, the Sm ₂ Fe ₁₇ N _x (0 < x ≦ 3) phase progressively decomposed with increasing heat‐treatment temperature, accompanied by the formation of α ‐Fe and iron oxides. Under stat…

Magnus Andreassen, Andreas Rosnes, Clemens Petersen, Richard J. Schenk et al.

Gallium sesquioxide is a wide‐bandgap semiconductor of high interest for power electronics and deep UV‐sensing applications. The α‐phase ( E _g = 5.6 eV) can be synthesized with excellent crystal quality on isostructural Al ₂ O ₃ substrates, removing the need for expensive homoepitaxial growth that is required for the thermodynamically stable β‐phase ( E _g = 4.9 eV).…

Alfred Moore, Ciaran Llewelyn, Dan Lamb, Yaonan Hou et al.

Amorphous gallium oxide (a‐Ga ₂ O ₃ ) has emerged as a promising material for ultraviolet (UV) optoelectronic applications, particularly solar‐blind photodetection, due to its wide bandgap, high transparency, and compatibility with low‐temperature, large‐area deposition. This review summarises key aspects of a‐Ga ₂ O ₃ , including material properties, deposition tec…

Mutsuhiro Shima, Kazuya Sugio, Tanawat Imboon, Keisuke Yamada et al.

We have investigated the effects of Mn doping and lattice vacancies on the structure and magnetic properties of chemically synthesized ZnO nanorods for d ⁰ ferromagnetism. Energy‐dispersive X‐ray spectroscopy analysis confirms that Mn composition X in ZnO nanorods with 80–198 nm in diameter and 0.477–2.10 μm in length increases from 0.29% to 4.1% with increasing the initial …

Ryushi Nakamura, Atsushi Suzuki, Takeo Oku, Tomoharu Tachikawa et al.

In the development of perovskite solar cells (PSCs), ion migration–induced hysteresis, long‐term stability degradation, and reduced fill factor caused by bulk and grain‐boundary defects remain critical challenges. In this study, lanthanoid (Yb/Er, Gd/Nd, Ce/Nd, Gd/Ce, and Yb/Nd) codoped PSCs were fabricated to address these limitations. Lanthanoid elements possess highly locali…

Ilise Feitshans

Science fiction from the last decades is rapidly becoming science in daily life. For example, nanotechnology does cool things like creating driverless cars for people who are blind and storing solar energy to drive electric cars. Nanotechnology makes possible 3D printing of housing, clothing, and food and miraculous treatments for previously incurable disease. In the larger soc…

Mohammad Ghaffar Faraj

This study systematically investigates the impact of depositional thermal budgets on the structural, optical, and electrical properties of zinc‐doped lead sulfide (Zn‐doped PbS) thin coatings (300 nm) synthesized over flexible polyimide substrates via cost‐effective chemical spray pyrolysis. The films were fabricated under substrate temperatures regulated at 300, 325, and 350 °…

Joonhyung Park, Kannan Udaya Mohanan, Chia‐Yun Chen, Sungyeop Jung et al.

The extraction and reporting of reliable device parameters are of paramount importance in semiconductor research. However, the interplay between specific physical and material properties often complicates the analysis of experimental data. This study examines the fundamental relationship between charge‐carrier mobility and contact resistance in field‐effect transistors. Through…

Moo‐Jae Han, Yohan Shin, Sang‐Won Kang, Sung‐Kwang Park et al.

In this study, we developed a flexible digital bolus dosimeter based on a polycrystalline HgI ₂ photoconductor embedded in a tissue‐equivalent polydimethylsiloxane (PDMS) matrix, incorporating a 70 μm protective layer for skin‐dose evaluation. The dosimeter exhibited excellent linearity ( R ² = 0.9996) within 2–400 MU and superior repeatability (standard deviation of 1.59…

Tanachat Eknapakul, Sirinee Thasitha, Komsilp Kotmool, Thanit Saisopa et al.

This first‐principles DFT study examines the structural, mechanical, magnetic, and optical properties of cubic Mn X ( X = Al, Co, Hg, Sb, Sn, Zn) compounds. MnCo, MnHg, MnSb, and MnZn are dynamically stable, with MnZn mechanically metastable; MnAl and MnSn are dynamically unstable. MnCo exhibits the highest elastic constant C ₁₁ (275.24 GPa), bulk modulus (~180 GPa), hardnes…

Bibhatsu Kuiri, K. Lavanya, Soumya Kanti Hazra

Lithium‐ion battery packs develop spatial temperature gradients that accelerate nonuniform aging and can trigger localized hotspots, motivating electrically isolated and EMI‐immune thermal monitoring. We present a numerical design and analysis of a short‐wave infrared (SWIR) wavelength‐encoded temperature sensor based on a 1D dielectric Bragg microcavity formed by symmetric SiO…

Mohamed M. Elnaggar, Pavel A. Troshin

Top electrodes play a vital role in perovskite solar cells (PSCs) by enabling efficient electron extraction and transport, which significantly influences the device efficiency and operational stability under harsh environmental conditions. This work presents a systematic investigation of different electrodes, such as aluminum (Al), silver (Ag), cobalt (Co), chromium (Cr), nicke…

Kenichi Nanbu, Fujio Hinode, Shigeru Kashiwagi, Hiroyuki Hama et al.

In this article, we study classical radiation from relativistic electrons at a facility, a test accelerator as a coherent terahertz source (t‐ACTS), at the Research Center for Accelerator and Radioisotope Science (RARiS), Tohoku University. We have previously studied coherent Smith–Purcell radiation from a metallic grating. In the previous setup, a Z‐cut quartz crystal window w…

Brendan Ubochi, Khaled Ahmeda, Brahim Benbakhti, Karol Kalna

An improved p‐channel metal oxide semiconductor (MOS) heterostructure field effect transistor (HFET) is proposed for a normally off operation with its counterpart n‐channel MOS‐HEMT in a CMOS GaN HFET power logic technology. The performance of the p‐channel MOS‐HFET is simulated using Silvaco device TCAD based on a transport model calibrated against experimental data. The impro…

Iaroslav A. Mogunov, Andrey Yu. Klokov, Nikolay Yu. Frolov, Andrey I. Sharkov et al.

Magnetoacoustic devices that harness the strong coupling between acoustic waves and magnons have emerged as a promising platform for energy‐efficient spintronics. Laser‐generated pulsed surface acoustic waves (SAWs) are particularly attractive for such applications, offering broadband frequency content up to the gigahertz range, remote excitation without lithographic patterning…

P. Salman Kurshid, K. A. Naseer, S. Arul Raja Sekaran, N. K. Sulfikarali et al.

An innovative series of glass networks with various oxide and fluoride modifiers has been synthesized employing the melt‐quench process. The UV–vis–NIR absorption, photoluminescence, and lifetime results are investigated for recognizing the impact of fluoride and oxide modifiers in the radiative properties of the studied glasses. Electronic 4f−4f transitions of the Eu ³⁺ ion…

Anita, Ashok Kumar

Hafnia oxide‐based resistive switching (RS) devices encounter key challenges as they scale, as variations in oxide layer thickness and the associated electric field can significantly impact both SET and RESET switching and conduction behaviors. This study aims at the thickness‐dependent RS properties of Al/Hf _0.75 Zr _0.25 O ₂ (HZO)/Pt memory structures. The forming, SE…

Po‐Hsun Chen, Jui‐Ching Wu, Hung‐Wei Kuo, Ting‐Ya Wang

This study investigates structural engineering to suppress humidity‐induced drain‐induced barrier lowering (DIBL) degradation in back‐channel‐etched (BCE) amorphous silicon (a‐Si:H) thin‐film transistors (TFTs). At 80% RH, polar H ₂ O infiltration significantly exacerbates DIBL instability. We comparatively analyzed standard (STD), thin‐channel (Thin‐CH), and thickened i‐lay…

Nguyen Duy Thien, Nguyen Ngoc Tu, Doan Thi Huyen, Le Quang Thao et al.

In this report, we present an advanced approach for the fabrication of active surface‐enhanced Raman scattering (SERS) substrates based on gold nanoparticles (AuNPs) and silicon nanowires (SiNWs) using a combination of photolithography, metal‐assisted chemical etching (MACE) methods and sputtering. In the first step, the photolithography technique is used to create ordered stru…