Zobrazeno 1 - 10
of 114
pro vyhledávání: '"T.M. Searle"'
Publikováno v:
Journal of Non-Crystalline Solids. 353:2479-2494
Tetrahedral iron (III) environments in alkali–alkaline earth–silica glasses have been studied as functions of alkali and alkaline earth cation type and Fe2O3 content using photoluminescence and optical absorption spectroscopies. The luminescence
Publikováno v:
Comptes Rendus Chimie. 5:787-796
The combined effect of alkali and alkaline-earth ions on the redox, distribution, co-ordination and environment of Fe ions in alkali–alkaline-earth–silica glasses has been studied using a multi-technique approach. Wet chemical analysis and Mossba
Publikováno v:
Journal of Non-Crystalline Solids. 253:203-209
Soda–lime–silica glasses (70 mol% SiO2:15 mol% Na2O:15 mol% CaO) containing 0.1–5 mol% Fe2O3 have been investigated using optical absorption spectroscopy, Mossbauer spectroscopy, and wet chemical analysis. Iron redox ratios measured by these di
Publikováno v:
Supramolecular Science. 4:437-441
We report on the preparation and optical properties of Langmuir-Blodgett multilayers of a ytterbium-containing molecular complex. The complex consists of a D-π-A conjugated hemicyanine cation ionically coupled to a negatively charged molecular compl
Autor:
T.M. Searle, T.-H. Wang
Publikováno v:
Journal of Non-Crystalline Solids. :280-283
Two existing rigid band models of low temperature luminescence in a-Si:H are compared and their difficulties examined. A new model is proposed which includes the essential features of both, and which explains the width and Stokes shift of the spectra
Autor:
T.M. Searle
Publikováno v:
Journal of Non-Crystalline Solids. :611-614
A simple model for the growth of photoluminescence PL and carrier population N p in a system where the photogenerated carriers are localised and recombine by tunnelling is described. It does successfully qualitatively describes the difference in rise
Publikováno v:
Journal of Non-Crystalline Solids. 161:235-240
Room temperature upconversion in Nd doped fluoride glasses excited with a cw diode laser is reported for the first time. With 801 nm diodes, efficiencies are high enough for the protected eye to see white light with pump powers as low as 10 mW. In ad
Autor:
T.M. Searle
Publikováno v:
Journal of Non-Crystalline Solids. :571-574
The kinetics of recombination of an initially random distribution of electrons and holes is discussed for the cases where the carriers are completely or nearly immobile because of localisation due to disorder. A one dimensional Monte-Carlo method is
Publikováno v:
Philosophical Magazine B. 63:179-191
We present new results on the excitation intensity and temperature dependence of the photoluminescence efficiency below 100K in a range of materials, largely but not exclusively based on a-Si: H. The results indicate that radiative rates which increa
Autor:
H. Mellor, Tim H. Richardson, H. Lui, S.L. Thorpe, T.M. Searle, David G. Lidzey, M.S. Weaver, Donal D. C. Bradley, Chun-Hui Huang, Dejian Zhou, M.A. Pavier
Publikováno v:
Synthetic Metals. 76:91-93
In this paper we report the construction of an organic light-emitting diode (LED) containing a rare-earth molecular complex that was deposited as a Langmuir-Blodgett (LB) film. The complex is a donor-conjugated π-electron system acceptor (D-π-molec