Zobrazeno 1 - 10 of 14 pro vyhledávání: '"J. W. Brightwell"'
1
The effect of cadmium doping on the photoluminescence in CaS at 77 and 295K
Autor: J. C. Bickerton, B Ray, J. W. Brightwell, I. V. F. Viney
Publikováno v: Journal of Crystal Growth. :939-943
Ca 1− x Cd x S microcrystalline samples, prepared by sintering of the constituent compounds at 1325 K, yielded intense broad band fluorescent materials at 77 and 295 K. At room temperature, excitation at 298 nm gave peak emission wavelengths which
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::dc443831a6753bfb80bbd9273427ab1a
https://doi.org/10.1016/s0022-0248(00)00256-6
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2
Enhancement of fluorescence and related spectra in Ca1 − Sr S with cadmium incorporation
Autor: B. Ray, J. W. Brightwell, I. V. F. Viney, S. Clough, J. C. Bickerton
Publikováno v: Journal of Crystal Growth. 159:939-942
Calcium fluoride used as a fluxing agent in Ca 1-x Sr x S has resulted in high crystallinity, single phase mixtures prepared at l100°C. Incorporation of cadmium in the system has been achieved in a sulphur-rich ambient. The photoluminescence (PL) en
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fb0933bf87c976aecd00c10d213e4247
https://doi.org/10.1016/0022-0248(95)00598-6
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3
Formation and optical properties of homogeneous solid solutions of Ca1−xSrxS: Ce
Autor: B. Ray, J. W. Brightwell, I. V. F. Viney, B. W. Arterton
Publikováno v: Journal of Crystal Growth. 138:1051-1054
Samples of Ca1-xSrxS: 0.001 Ce were prepared by reduction of mixed sulphates with H2/H2S at elevated temperatures. In the absence of a flux, only at 1200°C for long reaction times did near complete solid solution occur. However, addition of LiF flux
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3315a65ffee3b7cf48097a929fc77a82
https://doi.org/10.1016/0022-0248(94)90954-7
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4
Optically stimulated fluorescent emission in Ca 1 −x Sr x S : Ce
Autor: D. Maneval, J. W. Brightwell, B. Ray, B. W. Arterton, I. V. F. Viney
Publikováno v: Journal of Luminescence. :32-35
Samples of Ca 1-x Sr x S:0.001Ce show excitation spectra of generally similar form; an exciting wavelength of 254 nm produces emissions showing a blue shift with increasing Sr content at both 77 and 295 K. At 77 K the emission intensity decreases lin
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5bbb944cd6a2ab82996eaefae9ffa589
https://doi.org/10.1016/0022-2313(94)90087-6
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5
Electrical and optical stimulation of luminescence in Ca1−xCdxS
Autor: B. Ray, I. V. F. Viney, B. W. Arterton, J. W. Brightwell
Publikováno v: Journal of Crystal Growth. 138:1055-1060
Mixtures of CaS and CdS treated at 1020 o C for 2 h in a nitrogen atmosphere with an excess sulphur pressure have resulted in solid solutions, Ca 1-x Cd x S up to x=0.41. Fluorescence emission studies have indicated massively enhanced broad band emis
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ad1648df522556f0fe247295313f6418
https://doi.org/10.1016/0022-0248(94)90955-5
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6
Phosphorescent spectral and decay studies of CaI −xSrxS:Ce solid solutions
Autor: U. Fritz, B. Ray, B. W. Arterton, I. V. F. Viney, J. W. Brightwell
Publikováno v: Advanced Materials for Optics and Electronics. 3:283-288
Ca1 − xSrxS Solid Solutions at 10 m/o intervals have been prepared by coprecipitation of sulphates from aqueous solution followed by reduction at 1000°C with hydrogen. Phosphorescence emission spectra have been determined for these solid solutions
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d566984fae0ec4e35b4c2213bcfa39b3
https://doi.org/10.1002/amo.860030140
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7
Preparation and electroluminescence of CaS: (Ce, Eu and Cu) phosphors
Autor: B. Ray, J. W. Brightwell, B. W. Arterton, I. V. F. Viney
Publikováno v: Advanced Materials for Optics and Electronics. 3:301-306
Doped CaS powder samples were prepared using two methods: (i) a metathesis reaction of carbonate with H2S at 1200°C; (ii) reaction with Na2Co3/S flux at 1000°C in nitrogen, followed by washing in an alkaline solution, drying and sieving to give 20
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9883bdb4e2a32ea19306af6fee121136
https://doi.org/10.1002/amo.860030143
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8
Structural characterization of luminescent Ca0.95Cd0.05S
Autor: B. Ray, I. V. F. Viney, J. W. Brightwell, A. C. Wright, B. W. Arterton
Publikováno v: Journal of Materials Science: Materials in Electronics. 7
Cadmium-doped calcium sulphide has great potential as a broadband light source in both powder and thin film electroluminescent devices. We now report the first structural investigation of polycrystalline cadmium-doped calcium sulphide using a combina
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::10b01deee372a112961ff38c36d6901d
https://doi.org/10.1007/bf00188959
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10
Structures of and Bonding in Electronic Materials
Autor: J. W. Brightwell
Publikováno v: Electronic Materials ISBN: 9781461367031
The group IV semiconductor materials Si and Ge are both of the cubic, diamond, structural type in which the coordination number is four (tetrahedral) and the bond type is covalent since all atoms are the same and hence have identical electronegativit
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::935bc2d8bf42f2296cd6f387d3bb525a
https://doi.org/10.1007/978-1-4615-3818-9_1
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