UV-A and UV-B excitation region broadened novel green color-emitting CaGd₂ZnO₅:Tb³⁺ nanophosphors

Abstract

CaGd2ZnO5:Tb3+ nanophosphors showed the broadened excitation region as compared to Y2O3:Tb3+ and Gd2O3:Tb3+ phosphors, which covered almost the entire UV-B and UV-A regions.

Luminescence properties of Dy3+ ions activated novel warm white-light emitting CaGd2ZnO5 nanophosphors

“…The PLE spectra of Dy 3 þ ions consisted of a strong excitation band from 200 to 250 nm with the maxima at 230 nm. This band can be ascribed to the host absorption band (HAB) which is similar to our earlier report on the CGZO:Tb 3 þ nanophosphor [16]. The spectra also contained some weak excitation peaks at 275 and 312 nm corresponding to the electronic transitions ( 8 S 7/2 -6 11/2 ) and ( 8 S 7/2 -6 P 7/2 ) of Gd 3 þ ions, transitions of the Gd 3 þ ions decreased gradually by increasing the Dy 3 þ ion concentration.…”

“…1(a) shows the XRD patterns of the CGZO:1Dy 3 þ nanophosphor annealed at 1200 ºC. According to our earlier reports [15,16], the optimal annealing temperature was found to be at 1200 ºC and the dilute concentrations of doping ions did not show any considerable effect on the crystallite size and phase purity [16]. Recently, Xu et al [17] reported the crystal structure of the novel CGZO host lattice, but the JCPDS card is not available till now.…”

Review— On the Development of Phosphors for Luminescent Materials: Synthesis, Characterization, Applications and Evolution of Phosphors as White-Light-Emitting Diodes

“…17 The lighting and photonic sectors progressively view nano-phosphors as an intriguing future among the numerous nanoparticles that are now accessible. 18 The photoluminescence (PL) properties of nanoscale materials have z E-mail: hrasool23@gmail.com received significant attention in the past decade owing to their optical characteristics and photoluminescence outcomes from the de-excitation of the excited electron to the ground state. Investigators have previously reported several industrial important nano-phosphors and regarded them as prospective because of their potential use in numerous highly effective and novel displays and devices.…”

Structural and tunable optical properties of LiMgPO4:Tb3+ phosphor fabricated by sol–gel method

“…The occurrence of low phonon frequency and minimal amounts of Tb 3+ in the host structure will inhibit multiphonon relaxation and cross‐relaxation among Tb 3+ ions, leading to noticeable blue emissions from Tb 3+ . As a result, selecting an appropriate host structure and optimal Tb 3+ concentrations allows the production of different emission colors in Tb 3+ ‐doped phosphors 14–25 …”