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Titolo:
EFFECT OF CURING TEMPERATURE ON GREEN LIGHT-EMISSION FROM ER3-DOPED SOL-GEL SILICA GLASS()
Autore:
XU W; DAI S; TOTH LM; DELCUL GD; PETERSON JR;
Indirizzi:
UNIV TENNESSEE,DEPT CHEM KNOXVILLE TN 37996 UNIV TENNESSEE,DEPT CHEM KNOXVILLE TN 37996 OAK RIDGE NATL LAB,DIV CHEM TECHNOL OAK RIDGE TN 37831 OAK RIDGE NATL LAB,TRANSURANIUM RES LAB,DIV CHEM & ANALYT SCI OAK RIDGE TN 37831
Titolo Testata:
Journal of non-crystalline solids
fascicolo: 3, volume: 194, anno: 1996,
pagine: 235 - 240
SICI:
0022-3093(1996)194:3<235:EOCTOG>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
MULTIPHONON RELAXATION; IONS; ER-3+;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
27
Recensione:
Indirizzi per estratti:
Citazione:
W. Xu et al., "EFFECT OF CURING TEMPERATURE ON GREEN LIGHT-EMISSION FROM ER3-DOPED SOL-GEL SILICA GLASS()", Journal of non-crystalline solids, 194(3), 1996, pp. 235-240

Abstract

Green and less intense red emissions from Er3+ (4f(11))-doped sol-gelsilica samples (prepared from tetraethylorthosilicate at room temperature and dried at 70 degrees C) under 488 nm excitation were monitoredas a function of sample curing temperature. These green and red emission bands, centered at 550 and 660 nm, are the S-4(3/2) --> I-4(15/2) and F-4(9/2) --> I-4(15/2) transitions in Er3+ ions, respectively. Theemission intensities were found to increase with increasing sample curing temperature ranging from 200 to 1000 degrees C. Green upconversion emission from Er3+ ions in the same samples was also recorded under 647.1 nm light excitation. Its efficiency was enhanced with increased sample curing temperature. This enhancement is attributed to the Er3+-coordination environment produced by different sample curing temperatures. Increasing curing temperatures produces increasing degrees of dehydration and de-alcoholation around the Er3+ ions, thus resulting in adecrease in the non-radiative emission rate.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/09/18 alle ore 08:16:25