標題: Investigations into thermoluminescence and afterglow characterization of strontium aluminates with boron-modification and reductions via sol-gel route
作者: Chen, I-Cherng
Chen, Ker-Kong
Chen, Hong-Sen
Du, Je-kang
Lin, Tsao-Jen
Lin, Shiu-Shiung
Chen, Teng-Ming
Shieh, Tien-Yu
應用化學系
Department of Applied Chemistry
關鍵字: SrAl2O4:Eu2+,Dy3+;boron addition;long afterglow;thermoluminescence;decay constant;trap depth;rare earths
公開日期: 1-十月-2012
摘要: The effects of strontium aluminates of SrAl2O4:Eu2+,Dy3+ (SAED) and boron-modified SAED (BSAED) phases synthesized from a sol-gel process on thermoluminescence (TL) along with their afterglow properties were systematically investigated with thermal activation in the different atmospheres. The result showed that the addition of boron and the reduction routes of Eu3+ to Eu2+ in SrAl2O4:Dy3+ were related to phosphorescent decay properties. The aid of Dy3+ to induce the hole-trapping effect required both SAED and BSAED to be heated at 1300 degrees C under the H-2/N-2 (5%: 95%) atmosphere. However, the trapping behavior of the reductions of SAED in nitrogen was similar to the compound without Dy3+ co-doping SrAl2O4:Eu2+ (SAE) in H-2/N-2 (5%: 95%). BSAED showed deeper traps in situ compared to SAED which contained no boron, and this led to the better afterglow properties of BSAED than those of SAED. The afterglow spectrum of BSAED showed two peaks at 400+/-1 nm and 485+/-1 nm, which were two individuals composed and contributed from different depths of traps at 0.57 and 0.76 eV, accordingly. The depth of the traps was calculated from the Hoogenstraaten's plot of glow curves. The calculations for SAED and SAE were at around 0.43 and 0.18 eV, respectively.
URI: http://dx.doi.org/10.1016/S1002-0721(12)60163-X
http://hdl.handle.net/11536/20690
ISSN: 1002-0721
DOI: 10.1016/S1002-0721(12)60163-X
期刊: JOURNAL OF RARE EARTHS
Volume: 30
Issue: 10
起始頁: 972
結束頁: 978
顯示於類別:期刊論文


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  1. 000310756200002.pdf