Results 11 to 20 of about 584,233 (340)

Defect-related versus excitonic visible light emission from ion beam synthesized Si nanocrystals in SiO2 [PDF]

open access: yes, 1996
Two sources of room temperature visible luminescence are identified from SiO2 films containing ion beam synthesized Si nanocrystals. From a comparison of luminescence spectra and photoluminescence decay lifetime measurements between Xe + -implanted SiO2 ...
Atwater, Harry A.   +5 more
core   +1 more source

Comment on "Delayed luminescence of biological systems in terms of coherent states" [Phys. Lett. A 293 (2002) 93] [PDF]

open access: yes, 2010
Popp and Yan [F. A. Popp, Y. Yan, Phys. Lett. A 293 (2002) 93] proposed a model for delayed luminescence based on a single time-dependent coherent state.
Brouder, Christian, Salari, Vahid
core   +4 more sources

Super-quadratic behavior of luminescence decay excited by energy-transfer upconversion [PDF]

open access: yes, 2003
For several decades, energy-transfer upconversion (ETU) in rare-earth-ion doped systems [1,2] has attracted much attention, firstly, because of the fundamental interest in the physical nature of this process and, secondly, because of very practical ...
Bigotta, S.   +4 more
core   +7 more sources

Aggregation and luminescence in carbonized polymer dots

open access: yesAggregate, 2022
The aggregate luminescence behavior of organic luminescent materials has been studied extensively. As a new kind of luminescent nanomaterials, carbonized polymer dots (CPDs) not only inherit the stability and biocompatibility of carbon materials, but ...
Chunyuan Kang   +3 more
semanticscholar   +1 more source

Thermally boosted upconversion and downshifting luminescence in Sc2(MoO4)3:Yb/Er with two-dimensional negative thermal expansion

open access: yesNature Communications, 2021
Rare earth (RE3+)-doped phosphors generally suffer from thermal quenching, in which their photoluminescence (PL) intensities decrease at high temperatures.
J. Liao   +8 more
semanticscholar   +1 more source

Micro Vibration Measurement with Microscopic Speckle Interferometry Based on Orthogonal Phase

open access: yesApplied Sciences, 2021
A micro-device vibration measurement method based on microscopic speckle interferometry combined with orthogonal phase is presented. This method utilizes the approximate linear distribution characteristics of orthogonal points (points satisfying the ...
Chenjia Gao   +5 more
doaj   +1 more source

Trends in luminescence thermometry

open access: yes, 2020
Following astonishing growth in the last decade, the field of luminescence thermometry has reached the stage of becoming a mature technology. To achieve that goal, further developments should resolve inherent problems and methodological faults to ...
M. Dramićanin
semanticscholar   +1 more source

High temperature annealing of micrometric Zn2SiO4:Mn phosphor powders in fluidized bed [PDF]

open access: yes, 2008
Micrometric Zn1.8Mn0.2SiO4 phosphor powders prepared by spray pyrolysis have been annealed between 900 and 1200°C under ambient air atmosphere to exalt their luminescence properties. Two original gas-solid fluidization processes have been tested in order
Alavi, Shila   +2 more
core   +2 more sources

Color-Tunable Organic Light Emitting Diodes for Deep Blue Emission by Regulating the Optical Micro-Cavity

open access: yesMolecules, 2020
Nowadays, most blue organic light emitting diodes (OLEDs) are fabricated by using sky-blue emitters which are more easily synthesized when compared with other deep blue emitters. Herein, we put forward a new idea of using an optical micro-cavity based on
Jixin Jiang   +6 more
doaj   +1 more source

Scanning Tunneling Microscopy and Tunneling Luminescence of the Surface of GaN Films Grown by Vapor Phase Epitaxy [PDF]

open access: yes, 1995
We report scanning tunneling microscopy (STM) images of surfaces of GaN films and the observation of luminescence from those films induced by highly spatially localized injection of electrons or holes using STM.
Abraham,   +18 more
core   +1 more source

Home - About - Disclaimer - Privacy