Intense luminescence of amorphous Eu2O3 prepared by aqueous sol–gel method

Micro-structural investigations and paramagnetic susceptibilities of zinc oxide, europium oxide and their nanocomposite

“…Thus in nanoparticles of Eu 2 O 3 , the observed positions of these transitions were deviated from their theoretically allowed values. The second peak is mainly due to the 5 D 0 -7 F 2 transition, which is a forced electric dipole transition and it is the strongest emission peak [29,56]. But the transition 5 D 0 -7 F 3 also contributing towards the second peak as its observed value [56] also lies in the span of the observed peak.…”

“…The theoretical positions of these transitions are $579 ( 5 D 0 -7 F 0 ), $ 590 ( 5 D 0 -7 F 1 ), $ 611 ( 5 D 0 -7 F 2 ) and 649 nm ( 5 D 0 -7 F 3 ). The first peak observed at $ 590 nm is assigned to the 5 D 0 -7 F 1 transition, which is an allowed magnetic dipole transition [29]. But this peak spans from l=575 to 600 nm and this range of wavelength includes the theoretically allowed transition 5 D 0 -7 F 0 ( $ 579 nm) along with the position of the observed transition, 5 D 0 -7 F 1 .…”

“…An intensive research work on the compounds of Eu 3 + ion has been carried out for its potential applications as laser materials [23], phosphors [24,25], electroluminescent devices [26], oscillators [27], and high density optical storage [28]. Besides these, the interest behind Eu 3 + is due to its finite red emission (corresponding to inter term transition from 5 D 0 to 7 F 2 ), which constitutes one of the three primary colors red, blue and green [29]. The attention has also been paid to this material for its use as erasable optical storage and wide-band lasers.…”

Self-limiting adsorption of Eu3+ on the surface of rod-shape anatase TiO2 nanocrystals and post-synthetic sensitization of the europium-based emission

“…[45][46][47][48][49][50][51][52][53][54][55][56][57]61 Also, it has been shown that amorphous Eu 2 O 3 exhibits similar luminescence ( 5 D 0  7 F J transitions, relative intensities, and line-broadening) upon irradiation at 325 nm. 63,64 Nanocrystalline Eu 2 O 3 nanotubes give rise to a similar emission fingerprint when excited at 254 nm. 65 Therefore Eu-based luminescence could arise from TiO 2 excitation and energy transfer to Eu 3+ or from direct excitation of the O  Eu LMCT band.…”

Structure and Vibrational Spectra of Thin Films Y2O3:Eu

“…Проведені розрахунки свідчать про наявність провалу у спектрі відбивання, мінімум якого знаходиться поблизу 1400 см -1 , що узгоджується з експериментальними спектрами відбивання систем плівка-підкладинка. Це, найімовірніше, і є причиною досить слабкої інтенсивности смуг відбивання у спектральній області 1300-1600 см -1 , хоча у спектрах монокристалічних і порошкових зразків ці лінії досить помітні [10,11]. Положення інтерференційного мінімуму залежить від d, n, k, методику визначення яких описано нами в [12].…”