Fluorescence and Energy Transfer in Y2O3:Eu3+

Abstract

Experimental evidence for nonradiative resonant energy transfer between Eu3+ and other trivalent rare-earth ions in Y2O3 is presented and possible interaction mechanisms are examined. It is concluded that coupling via overlap of near zone quadrupolar fields is important. Measurements on the transient behavior of the Eu3+ fluorescence are also discussed.

Multiplets in Polymer Gels. Rare Earth Metal Ions Luminescence Study

“…In this pair the energy transfer is much more effective. Previously the energy transfer Eu 3+ → Nd 3+ was studied for other systems, for example, in refs −24.…”

Luminescence of Europium in the Ternary System: La[sub 2]O[sub 3]-Gd[sub 2]O[sub 3]-Y[sub 2]O[sub 3]

“…The ternary system forms only four compounds: LaYO3 is monoclinic (9), and presumably LaGdO3 has the same structure; La3YO6 is hexagonal, and likewise its conjugate, La~GdO6. Since these steps are essentially quantitative, no serious error is believed to have resulted (7). Figure 3 shows a phase diagram found for the ternary system fired at 1000~ Three separate single-phase regions were found: cubic, monoclinic, and hexagonal.…”

“…Recently, however, there has been a renaissance of interest in the fluorescence of rare earths, chiefly because of their applicability to the field of lasers. Wickersheim and Lefever (6) gave general properties of luminescence of phosphors based on Y203 and La203, while in the most recent work, Axe and Weller (7) studied the effect of other rare-earth impurities on the luminescence of Eu +3 in Y208. Subsequent investigations included description of the ultraviolet properties of La203:Pr (2), as well as Lu203, Sc203, or Y208, all activated by Sm (3).…”

Процессы передачи энергии в эвлитите Sr-=SUB=-3-=/SUB=-Y(PO-=SUB=-4-=/SUB=-)-=SUB=-3-=/SUB=-, по отдельности и одновременно легированном ионами Tb-=SUP=-3+-=/SUP=- и Tm-=SUP=-3+-=/SUP=-

“…Безызлучательный перенос возбуждения с участием трехвалентных ионов лантаноидов интенсивно изучался, начиная с начала 1960-х годов [1][2][3], но все еще привлекает большое внимание в связи с нерешенными вопросами, касающимися механизмов передачи энергии [4] и технологических применений этого типа процессов [5,6]. Передача энергии Tb 3+ ↔ Tm 3+ была зарегистрирована и исследована в прошлом, однако особое внимание было уделено применению данных ионов в кристаллических и некристаллических материалах с целью получения белого света (при солегировании другим подходящим ионом или несколькими ионами) [7][8][9] или усиленного излучения в ближней ИК области [10].…”