Results 81 to 90 of about 17,007 (304)

Unexpected luminescence of Cr5+ and Cr3+ ions in ZrSiO4 zircon crystals [PDF]

, 2000
Luminescence, decay-times and EPR spectroscopy of Cr-doped ZrSiO4 show the presence of both Cr3+ and Cr5+ active centers, which can be connected with Zr4+ and Si4+ adjacent two-cation replacement.
Reisfeld R., Panczer G., Gaft M., Bulka G., Guyot Y., Votyakov S., Boulon G.   +6 more
core  

Orbital Geometry‐Governed Response of Pressure‐Tunable Quantum Defects in hBN

Advanced Functional Materials, EarlyView.
Defects in hBN act as ultrasensitive quantum manometers when the energy of the intradefect optical transitions is modified by lattice compression. The orbital geometry of the electron wave functions governs how electron hopping and Coulomb interactions react uniquely to the reduction of the van der Waals gap and in‐plane compression, leading to robust ...
Magdalena Grzeszczyk, Danis I. Badrtdinov, Kenji Watanabe, Takashi Taniguchi, Cyrus E. Dreyer, Malte Rösner, Maciej Koperski   +6 more
wiley   +1 more source

Temperature and Fluence Dependence Investigation of the Defect Evolution Characteristics of GaN Single Crystals Under Radiation with Ion Beam-Induced Luminescence

Quantum Beam Science
To investigate the in situ irradiation effects of gallium nitride at varying temperatures, we combined ion beam-induced luminescence spectroscopy with variable-temperature irradiation using a home-built IBIL system and a GIC4117 2 × 1.7 MV tandem ...
Xue Peng, Wenli Jiang, Ruotong Chang, Hongtao Hu, Shasha Lv, Xiao Ouyang, Menglin Qiu   +6 more
doaj   +1 more source

Luminescence properties of SiV-centers in diamond diodes [PDF]

, 2022
The silicon-vacancy center (SiV-center) is a promising candidate for quantum-physical applications due to its physical properties. Besides its narrowband photon emission at 738 nm wavelength, it shows a high photo-stability already at ambient conditions.
Tegetmeyer, Björn
core  

Exciton Binding Energy of Phosphorescent Emitter Molecules in Organic Light‐Emitting Diodes

Advanced Functional Materials, EarlyView.
Energy level alignment is key to efficient OLED design, yet determining LUMO energies remains challenging. A methodology based on field‐induced dissociation and kinetic Monte Carlo simulations is presented to extract LUMO energies of iridium‐based phosphorescent emitters from their exciton binding energy.
Hiroki Tomita, Lucas R. L. Norg, Patrick Diederen, Clint van Hoesel, Christ H. L. Weijtens, Peter A. Bobbert, Reinder Coehoorn   +6 more
wiley   +1 more source

Thermoluminescence of zircon: a kinetic model [PDF]

, 2003
The mineral zircon, ZrSiO4, belongs to a class of promising materials for geochronometry by means of thermoluminescence (TL) dating. The development of a reliable and reproducible method for TL dating with zircon requires detailed knowledge of the ...
Hartog, H.W. den,, den Hartog, HW, Turkin, AA, Vainshtein, DI, D I Vainshtein, H J Van Es, Vainshtein, D.I.,, van Es, HJ, A A Turkin, Es, H.J. van,, H W Den Hartog, Turkin, A.A.,   +11 more
core   +1 more source

Ultrasensitive Anti‐Stokes Luminescence Thermometry in Transition Metal Dichalcogenide Monolayers

Advanced Functional Materials, EarlyView.
We demonstrate a highly sensitive nanothermometer using anti‐Stokes photoluminescence, also known as photoluminescence upconversion (UPL), in monolayer tungsten disulfide. A strong resonantly enhanced UPL is observed, confirming the central role of optical phonons in the PL upconversion mechanism.
Sharada Nagarkar, Fahrettin Sarcan, Elanur Hut, Emiliano R. Martins, Stuart A. Cavill, Thomas F. Krauss, Yue Wang   +6 more
wiley   +1 more source

Synthesis and Research of Alumina Ceramics Properties

Chimica Techno Acta, 2020
The article describes in detail alumina powder synthesis by different methods at varying parameters. The technique of obtaining ceramics and the research of the optical properties for determining the materials with the maximum luminescence efficiency is ...
Evgeniy I. Frolov, Polina V. Notina, Sergey V. Zvonarev, Evgeniya A. Il'ina, Vyacheslav Yu. Churkin   +4 more
doaj   +1 more source

Modification of Space Charge Pattern and Charge Mobility of Low Density Polyethylene (LDPE) in the presence of Crosslinking Byproducts [PDF]

, 2009
The formation of space charge in Crosslinked Polyethylene (XLPE) cable has always been related to the byproducts such as acetophenone, ?-methylstyrene and cumyl alcohol. In this paper, the argument is to be justified.
Nuriziani Hussin, Hussin, Nuriziani, George Chen, Chen, George   +3 more
core   +1 more source

Quantifying Subsurface Weak in‐Plane Magnetization of Mixed Phase BiFeO3 by Scanning Nitrogen Vacancy Magnetometry

Advanced Functional Materials, EarlyView.
We use scanning nitrogen vacancy magnetometry to directly image the weak in‐plane magnetic moments in mixed phase BiFeO3 at the nanoscale and quantify the local magnetic moments to be 18.8±2.0 μB/nm2 in the rhombohedral‐like phase and 1.5±0.6 μB/nm2 in the well‐known non‐magnetic tetragonal‐like phase.
Lei Wang, Zhewen Xu, Yuwen Xu, Björn Josteinsson, Simon Josephy, Dawei Zhang, Yunlong Sun, Heung‐Sik Park, Jihun Kim, Kanghyun Chu, Kyung Song, Danyang Wang, Chan‐Ho Yang, Andrea Morales, Jan Seidel   +14 more
wiley   +1 more source