Enhancement of photoluminescence emission intensity of zirconia thin films via aluminum doping for the application of solid state lighting in light emitting diode

Facile green fabrication of iron-doped cubic ZrO2 nanoparticles by Phyllanthus acidus: Structural, photocatalytic and photoluminescent properties

“…Table 1 lists the morphology and calcination temperatures for different hosts reported by various authors [27,8,[28][29][30]. For better understanding of the structure and real crystalline size of the Fe-doped ZrO 2 NPs, XRD studies were carried out.…”

Bright Green Luminescence from Zirconium Oxide Stabilized with Tb<sup>3+</sup> Ions Synthesized by Solution Combustion Technique

“…The undoped ZrO 2 exists in tree isomorphic forms depending of the annealing temperature T a ; if T a < 1170˚C the monoclinic (m) phase is present, if 1170˚C < T a < 2370˚C ZrO 2 is tetragonal (t), while above of 2370˚C ZrO 2 has a cubic (c) phase [4]. However, to obtain the tetragonal and cubic room, stabilized phase is no necessary an increase of temperature since actually there are some chemical methods to stabilize this phase at room temperature, these methods include producing material with grains below a critical size; Garvie [5], Stichert [6], and Valmalette [7] studied the influence of the crystallite size on the BET superficial area, the crystallization temperature, and the phase tran-sition temperature; doping with foreign ions such as Eu 3+ , Tb 4+ , Ca 2+ , Mg 2+ , La 3+ , Y 4+ [2,[8][9][10][11][12][13][14][15][16] etc. ; using specific solvents; Xiulin et al [17] synthesized pure tetragonal and monoclinic phases using polyhydric alcohols and alkil halides respectively.…”

“…Stabilized ZrO 2 is useful in high temperature solid oxide fuel cells (SOFC), high temperature PH sensors, and as special refractory material [12][13][14] phase. Moreover, it is well known that the luminescence of the zirconia can be enhanced by an doping process with rare earth such as Tb 3+ , Pr 3+ , Er 3+ , Eu 3+ , and Sm 3+ ions [2,8,[11][12][13][14][15][16][17][18][19][20][21], these today are considered the better optical activators for luminescent devices and photonics. There are various routes for the ZrO 2 synthesis, among them the most used are: homogeneous precipitation [22][23][24], sol-gel method [13,[25][26][27], spray pyrolysis [12], laser floating zone technique [28], solid reaction state [29], and solution combustion synthesis method [11,[30][31][32][33], this last method is quite simple, fast and economical in which an oxidizer and a fuel in an highly exothermic redox chemical reaction stoichiometric pro-…”

Optical enhancement of Au doped ZrO2 thin films by sol–gel dip coating method

“…At 243 nm (5.11 eV) excitation a large intensity emission band of 390 nm is produced. The excitation band at 243 nm corresponds to energy near the energy gap of ZrO 2 tetragonal phase and has been assigned to grain boundaries defect states, which are an inherent aspect of the nanocrystallinity [2][3][4]. The intense zirconia emission peak at E389 nm in the ZrO 2 thin film can be due to the ionized oxygen vacancies (F and F _ centers) from the conduction band.…”

“…It is due to the intentional defects generated by doping ions, which may have a profound effect on the electronic and optical properties of the materials. [4][5][6][7][8] Further when the noble metals are doped with wide band gap semiconductor (ZrO 2 ) it can create new opportunities for plasmonic manipulation of light because of the plasmon resonance frequency of noble metals [9,10]. The presence of noble metals such as Au and Ag nanoparticles (NPs) in the ZrO 2 matrix, cause strong light absorption band in the visible region known as Localized surface plasmon resonance (LSPR).…”