Results 81 to 90 of about 240,081 (351)

Change energy photons of radiation, stimulating a photoluminescence in glasses and optical fiber, activated by bismuth [PDF]

Physics-Uspekhi, vol. 49, No. 4, 401 (2006).; Semiconductors, vol.39, 884 (2005), 2011
In the offered review ordering received and published by domestic and foreign researchers of the experimental results showing the phenomenon of a photoluminescence in glasses and optical fiber, activated by bismuth is executed, and from uniform positions representations about the process responsible for a photoluminescence in case of use for excitation
arxiv  

Photoluminescence in amorphous MgSiO_3 silicate [PDF]

, 2013
Samples of amorphous MgSiO_3 annealed at temperature steps leading up to their crystallisation temperature show a rise in photoluminescence activity, peaking at ~450C. The photoluminescence band has a main peak at 595nm and a weaker peak at 624nm.
arxiv   +1 more source

Near‐Infrared Circularly Polarized Electroluminescence with Switchable Handedness in Organic LEDs

Advanced Functional Materials, EarlyView.
The first fully‐organic circularly polarized near‐infrared OLED, using a co‐assembled active layer of ITIC and a chiral inducer, exhibits dissymmetry values up to 0.074 and 1.65 Wsr−1m−2 radiance. The circular polarization sign can be switched by manipulating the position of the recombination zone, resulting in enhanced device performance and stability.
Francesco Zinna, Chiara Botta, Silvia Luzzati, Lorenzo Di Bari, Umberto Giovanella   +4 more
wiley   +1 more source

Photoluminescence of ortho-bromobenzophenone [PDF]

Low Temperature Physics, 2006
Phosphorescence spectra of crystalline ortho-bromobenzophenone (2-bromobenzophenone, 2BrBP) were measured from 1.6K to room temperature. A cardinal emission mechanism crossover occurs within this temperature range. At low temperature the phosphorescence spectrum is a superposition of two similar sets of equidistant bands spaced by the CO stretch ...
Avdeenko, A.A., Pyshkin, O.S., Eremenko, V.V., Strzhemechny, M.A., Buravtseva, L.M., Romashkin, R.V.   +5 more
openaire   +3 more sources

The Role of Fluorine‐Functionalized Organic Spacers for Defect Passivation and Low‐Dimensional Phase Formation in 3D MAPI Perovskite Solar Cells

Advanced Functional Materials, EarlyView.
Fluorine‐functionalized organic spacers (2F, 3F, 5F) are investigated to identify as optimal passivation agents for 3D MAPI perovskite solar cells (PSCs). The study highlights how altering fluorine positioning affects defect passivation, low‐dimensional phase (LDP) formation, and stability, emphasizing its role in molecular interactions and offering ...
Ali Semerci, Javier Urieta‐Mora, Sander Driessen, Ali Buyruk, Rik Hooijer, Agustín Molina‐Ontoria, Bülent Alkan, Seckin Akin, Mattia Fanetti, Harishankar Balakrishnan, Achim Hartschuh, Shuxia Tao, Nazario Martín, Peter Müller‐Buschbaum, Saim Emin, Tayebeh Ameri   +15 more
wiley   +1 more source

An $\mathrm{\textit{ab-initio}}$ effective solid state photoluminescence by frequency constraint of cluster calculation [PDF]

, 2019
Measuring the photoluminescence of defects in crystals is a common experimental technique for analysis and identification. However, current theoretical simulations typically require the simulation of a large number of atoms to eliminate finite size effects, which discourages computationally expensive excited state methods.
arxiv   +1 more source

Photoluminescence of diamondoid crystals [PDF]

Journal of Applied Physics, 2011
The photoluminescence of diamondoids in the solid state is examined. All of the diamondoids are found to photoluminesce readily, with initial excitation wavelengths ranging from 233 nm to 240 nm (5.3 eV). These excitation energies are more than 1 eV lower than any previously studied saturated hydrocarbon material.
Clay, William, Sasagawa, Takao, Iwasa, Akio, Liu, Zhi, Dahl, Jeremy E., Carlson, Robert M. K., Kelly, Michael, Melos, Nicholas, Shen, Zhi-Xun   +8 more
openaire   +2 more sources

Over 18% Efficiency from Halogen‐Free Solvent‐Processed Polymer Solar Cells Enabled by Asymmetric Small Molecule Acceptors with Fluoro‐Thienyl Extended Terminal

Advanced Functional Materials, EarlyView.
An asymmetric non‐fullerene acceptor BTP‐FT is developed by extending the end group of Y6‐BO with thiophene. The conformation of the molecule is determined by the noncovalent F···S interaction as demonstrated by 2D NMR and simulations. An efficiency of 18.39% is achieved in the resulting ternary solar cells processed from toluene.
Jingnan Wu, Fengbo Sun, Xinxin Xia, Leandro R. Franco, Qiaonan Chen, Yúang Fu, Rafael B. Ribeiro, Xinhui Lu, C. Moyses Araujo, Xunchang Wang, Renqiang Yang, Xia Guo, Donghong Yu, Maojie Zhang, Ergang Wang   +14 more
wiley   +1 more source

Temperature effects on luminescent properties of Sr2CeO4:Eu3+ nanophosphor: A machine learning approach [PDF]

Tehnika, 2020
In this paper we analyze possibilities of application of Sr2CeO4:Eu3+ nanopowder for temperature sensing using machine learning. The material was prepared by simple solution combustion synthesis.
Šević Dragutin, Vlašić Ana, Rabasović Maja S., Savić-Šević Svetlana, Rabasović Mihailo D., Nikolić Marko G., Murić Branka D., Marinković Bratislav P., Križan Janez   +8 more
doaj  

Photoluminescence of Bi12SiO20 crystals [PDF]

Ukrainian Journal of Physical Optics, 2016
Spectra of photoluminescence (PL), luminescence excitation, stationary and photoactivated optical absorptions and photoconductivity are studied for Bi12SiO20 crystals.
O. V. Khmelenko, A. A. Dyachenko, T. V. Panchenko   +2 more
openaire   +2 more sources