HANDBOOK ON THE PHYSICS AND CHEMISTRY OF RARE EARTHS

PDF Publication Title:

HANDBOOK ON THE PHYSICS AND CHEMISTRY OF RARE EARTHS ( handbook-onphysics-and-chemistry-rare-earths )

Previous Page View | Next Page View | Return to Search List

Text from PDF Page: 101

c a b Rare Earth-Doped Phosphors for White LEDs Chapter 278 65 FIG. 61 Crystal structure of Sr8Al12O24S2. The unit of bond distance is nm. Pictures were drawn based on the structure data obtained from the database (ICSD #67590). S SiO4 Sr 0.3077(5) 0.2472(3) 0.3077(4) S 0.29567(9) 0.2472(3) Sr 0.3077(4) 0.2472(6) 1 0.5 0 ex. em 400 500 600 Wavelength (nm) 700 Excitation and emission spectra of Sr8Al12O24S2:Eu2+. Redrawn from Dong, K., Li, Z., Xiao, S., Xiang, Z., Zhang, X., Yang, X., Jin, X., 2012. Yellowish-orange luminescence in Sr8Al12O24S2:Eu2+ phosphor. J. Alloys Compd. 543, 105–108. different from those of CaGa2S4 and SrGa2S4: it crystallizes in the cubic space group Pa3. The detail crystallographic data of AEGa2S4 are summarized in Table 9. The crystal structure of SrGa2S4 is shown in Fig. 63. The Sr2+ ions occupy square antiprismatic sites formed by eight S2 ions, forming a SrS8 dodecahedron (Eisenmann et al., 1983). The Sr2+ ions are located in three different sites; 8a, 8b, and 16c. The Ga3+ ions form GaS4 tetrahedra. The excitation spectra of CSGa2S4:Eu2+ (CS1⁄4Ca and Sr) show a broad band extending from 300 to 500 nm (Fig. 64). The broad excitation bands are well matched with the emission spectra of blue-LED chips. BaGa2S4:Eu2+ FIG. 62 Normalize intensity (a.u.)

PDF Image | HANDBOOK ON THE PHYSICS AND CHEMISTRY OF RARE EARTHS

PDF Search Title:

HANDBOOK ON THE PHYSICS AND CHEMISTRY OF RARE EARTHS

Original File Name Searched:

Chemistry-Rare-Earths-49.pdf

DIY PDF Search: Google It | Yahoo | Bing

Sulfur Deposition on Carbon Nanofibers using Supercritical CO2 Sulfur Deposition on Carbon Nanofibers using Supercritical CO2. Gamma sulfur also known as mother of pearl sulfur and nacreous sulfur... More Info

CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info

CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com (Standard Web Page)