The influence of the conduction band of BaCl2 on the thermal quenching of the Tm2+ 4f125d1→4f13 and 4f13→4f13 luminescence in orthorhombic BaCl2:Tm2+/3+ by M.P. Plokker, H.T. Hintzen

“…In addition, the energy for exciton creation in the orthorhombic BaCl2 host lattice was established, from which the bandgap energy was determined. This value was found to correspond quite well to known literature values. …”
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Ultra‐Low Threshold Resonance Switching by Terahertz Field Enhancement‐Induced Nanobridge by Sang‐Hun Lee, Moohyuk Kim, Yeeun Roh, Myung‐Ki Kim, Minah Seo

“…In this study, ultra‐low threshold resonance mode switching by strong nonlinear carrier transport beyond the semi‐classical Boltzmann transport regime using terahertz (THz) electromagnetic waves are demonstrated, whose energy is thousands of times smaller than the bandgap. This is achieved by employing elaborately fabricated 3D tip structures at the nanoscale, and nonlinear effects are directly observed with the THz resonance mode switching. …”
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Bi2O3–BiOCl/poly-m-methyl aniline nanocomposite thin film for broad-spectrum light-sensing by Ben Gouider Trabelsi Amira, Alkallas Fatemah H., Kusmartsev Fedor V., Rabia Mohamed

“…X-ray diffraction (XRD) analysis confirms the composite’s high crystallinity and compact size of 41 nm, indicative of excellent optical properties and a narrow bandgap of 2.35 eV. The optical analysis of the synthesized core–shell composite is performed using Fourier transform infrared spectroscopy (FTIR). …”
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ATO/Polyaniline/PbS Nanocomposite as Highly Efficient Photoelectrode for Hydrogen Production from Wastewater with Theoretical Study for the Water Splitting by Mohammed A. H. Khalafalla, N. M. A. Hadia, Asmaa M. Elsayed, Mansoor Alruqi, Wassim El Malti, Mohamed Shaban, Mohamed Rabia

“…The optical analyses were massively enhanced after the composite formation with more broadening in the Vis region at 630 nm, in which there was more enhancement in the bandgap that reached 1.5 eV. The electrode application in the H2 generation process was carried out from wastewater (sewage water, third treatment) without any additional sacrificing agent. …”
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Facile Controlling of the Physical Properties of Zinc Oxide and Its Application to Enhanced Photocatalysis by Tuan Vu Anh, Thi Anh Tuyet Pham, Van Hung Mac, Thanh Hung Nguyen

“…R-ZnO was composed of many hexagonal rods and few spherical particles, while N-ZnO microstructures were made up of nanoparticles with approximately 20–30 nm, exhibiting the largest surface area, pore volume, and pore width among as-prepared samples, and their crystal size and bandgap energy were 17.8 nm and 3.207 eV, respectively. …”
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Enhancing visible luminescence in sprayed-ZnO nanostructure through Cu doping by Fatima Zohra Bedia, Asma Bedia, Sidi Mohammed Bedia, Nabila Maloufi, Michel Aillerie, Khadidja Rahmoun

“…An increase in defects in the ZnO crystal leads to bandgap narrowing, from 3.273 to 3.202 eV. This study demonstrates that CZO films, synthesized through a cost-effective and straightforward method, are well-suited for optoelectronic applications.…”
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Hydrothermal Synthesis of CuO Nanoparticles: Tailoring Morphology and Particle Size Variations for Enhanced Properties by Tijen Ennil Bektaş, Uğur Cengiz, Gürkan Akarken

“…Among these, CuO stands out as a p-type semiconductor having narrow bandgap energy ranges from 1.2 to 2 eV, finding versatile applications such as gas sensing, magnetic storage, solar energy conversion, photocatalysis, supercapacitors, field-emission emitters, and optical switches. …”
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Green Synthesis of Silver Nanoparticles Using Catharanthus roseus Flower Extracts and the Determination of Their Antioxidant, Antimicrobial, and Photocatalytic Activity by Mathivathani Kandiah, Kavishadhi N. Chandrasekaran

“…The SEM image of purple flower AgNPs and the calculated bandgap energies of the synthesized AgNPs showed that the synthesized AgNPs were in the range of 0–30 nm. …”
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Synthesis, Characterization, Optical and Dielectric Properties of NiO and Zn-Doped NiO Nanostructures: Toward Advanced Applications by Atizaz Ali, Sohail Ahmad, Muhammad Usman, Nangyaley Khan, Muhammad Hashim, Yasir Ali, Rasool Shah, Naveed Ur Rahman

“…Ultraviolet–visible (UV-Vis) spectroscopy demonstrated heightened absorption in doped and nanocomposite samples. The bandgap energy calculated using Tauc’s plot reduced from 2.95 to 2.55 eV with increase in zinc (Zn) content. …”
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Lepidium sativum Seed Extract-Mediated Synthesis of Zinc Oxide Nanoparticles: Structural, Morphological, Optical, Hemolysis, and Antibacterial Studies by Adnan Alnehia, Annas Al-Sharabi, Abdel-Basit Al-Odayni, A. H. Al-Hammadi, Fares H. AL-Ostoot, Waseem Sharaf Saeed, Naaser A. Y. Abduh, Ali Alrahlah

“…The results indicated a 24.2 nm crystallite size, a hexagonal structure phase, and a 3.48 eV optical bandgap. Antibacterial studies revealed a dose-dependent response with comparable activity to the standard drug (gentamicin) and higher activity against S. aureus than E. coli, e.g., the zone of inhibition at 120 mg/mL was 23 ± 1.25 and 16 ± 1.00 mm, respectively. …”
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Understanding the impact of plasma functionalized MWCNTs on the structure, physicochemical and mechanical properties of PEMA by Omar F. Farag, N. A. M. Eid, Essam M. Abdel‑Fattah

“…Optical studies showed a reduction in the bandgap energy as the f-MWCNTs content increased, accompanied by significant improvements in optical properties such as refractive index (n), extinction coefficient (k), dielectric constants (ε′ and ε″), and optical conductivity (σopt). …”
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Extreme Electron‐Photon Interaction in Disordered Perovskites by Sergey S. Kharintsev, Elina I. Battalova, Ivan A. Matchenya, Albert G. Nasibulin, Alexander A. Marunchenko, Anatoly P. Pushkarev

“…In this paper, a new strategy based on both cases for the light‐matter‐interaction enhancement in a direct bandgap semiconductor – lead halide perovskite CsPbBr3 – by using electric pulse‐driven structural disorder, is addressed. …”
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THE EFFECT OF CRITICAL ELECTRIC FIELDS ON THE ELECTRONIC DISTRIBUTION OF BILAYER ARMCHAIR GRAPHENE NANORIBBONS by Lam Thuy Duong Nguyen, Thi Kim Quyen Nguyen, Nguyen Huu Hanh Pham, Dang Khoa Le, Van Chinh Ngo, Thi Kim Loan Phan, Anh Huy Huynh, Thanh Tra Vu

“…The results show that the perpendicular electric field has a strong impact on modifying and controlling the bandgap of BL-AGNRs. At the critical values of this electric field, distortions of energy dispersion in subbands and the formation of new electronic excitation channels occur strongly. …”
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Solution processable perovskite-hybrid heterojunction silicon 4T tandem solar cells by Mohammad Adil Afroz, Bhavna Sharma, Ruchi K. Sharma, Ritesh Kumar Gupta, Ankita Sengupta, Sanjay K. Srivastava, Soumitra Satapathi

“…The proposed 4-terminal tandem architecture exploits light management through the bandgap matching of the perovskite cell with silicon to minimize thermalization and absorption losses. …”
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An experimental study on photocatalytic degradation to free river water from toxic dye pollutant using Zn doped TiO2 nanoparticles by Sarathi R, Sheeba N. L., Selva Esakki E, Renuga Devi L, Meenakshi Sundar S

“…From the XRD Spectra average crystallite size, lattice parameters, volume of unit cell are studied. The bandgap of the material was found by using UV-Vis absorbance Spectroscopy. …”
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Supercontinuum generation in scintillator crystals by Vaida Marčiulionytė, Gintaras Tamošauskas, Matas Šutovas, Audrius Dubietis

“…The measured cut-off wavelengths at the short-wavelength side are in line with the general trend of blue-shifted spectral broadening on the bandgap of nonlinear material. All the nonlinear materials produced reasonable red-shifted spectral broadenings under conditions of optimal pump pulse energies, with the largest red-shift exceeding 2000 nm measured in GGG crystal. …”
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Characteristics of Nanocrystallite-CdS Produced by Low-Cost Electrochemical Technique for Thin Film Photovoltaic Application: The Influence of Deposition Voltage by Obi Kingsley Echendu, Francis Birhanu Dejene, Imyhamy Mudiy Dharmadasa, Francis Chukwuemeka Eze

“…All the annealed films show energy bandgap of 2.42 eV. Scanning electron microscopy and energy dispersive X-ray analyses show that grains on the surface of the films tend to get cemented together after annealing with prior CdCl2 treatment while all the films are S-rich.…”
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GaN Nanopowder synthesis via nitridation: Fabrication and characterization of GaN thin Films for UV detection applications by Mahdi Hajimazdarani, Peyman Yaghoubizadeh, Ali Jafari, Ali Kenarsari Moghadam, Mojtaba Hajimazdarani, Mohammad Javad Eshraghi

“…Additionally, ultraviolet diffuse reflectance spectroscopy measurements revealed a bandgap of 3.37 eV for the deposited thin film. Additionally, gold electrodes were deposited on the gallium nitride thin film, and the optical sensor's detection properties were evaluated, demonstrating a sensitivity of 133.6 along with rise and fall times of 18 ms and 15 ms, respectively. …”
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Intervalence plasmons in boron-doped diamond by Souvik Bhattacharya, Jonathan Boyd, Sven Reichardt, Valentin Allard, Amir Hossein Talebi, Nicolò Maccaferri, Olga Shenderova, Aude L. Lereu, Ludger Wirtz, Giuseppe Strangi, R. Mohan Sankaran

“…Abstract Doped semiconductors can exhibit metallic-like properties ranging from superconductivity to tunable localized surface plasmon resonances. Diamond is a wide-bandgap semiconductor that is rendered electronically active by incorporating a hole dopant, boron. …”
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A thin film optoelectronic photodetector of spherical and linear resonators via one-pot synthesis of Bi(III) oxide/polypyrrole nanocomposite by Fatemah H. Alkallas, Mohamed Rabia, Fedor V. Kusmartsev, Amira Ben Gouider Trabelsi

“…The XRD analysis reveals that the Bi2O3 nanoparticles have a poly-crystalline nature with a crystal size of 40 nm and an optical bandgap of 2.86 eV. The SEM images show that the nanoparticles are agglomerated into clusters of about 100 nm in diameter, with pores of about 200 nm in width. …”
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