Eu<sub>0.56</sub>Ta<sub>2</sub>O<sub>7</sub>: A New Nanosheet Phosphor with the High Intrananosheet Site Photoactivator
Concentration
Tadashi C. Ozawa
Katsutoshi Fukuda
Kosho Akatsuka
Yasuo Ebina
Takayoshi Sasaki
Keiji Kurashima
Kosuke Kosuda
10.1021/jp711699c.s002
https://acs.figshare.com/articles/journal_contribution/Eu_sub_0_56_sub_Ta_sub_2_sub_O_sub_7_sub_A_New_Nanosheet_Phosphor_with_the_High_Intrananosheet_Site_Photoactivator_Concentration/2958631
High photoactivator concentration nanosheets Eu<sub>0.56</sub>Ta<sub>2</sub>O<sub>7</sub> have been prepared by the soft chemical exfoliation
reaction of the layered perovskite Li<sub>2</sub><sub>-</sub><i><sub>x</sub></i>H<i><sub>x</sub></i>Eu<sub>0.56</sub>Ta<sub>2</sub>O<sub>7</sub> with a tetrabutylammonium hydroxide aqueous solution.
In-plane X-ray diffraction and TEM and AFM observation results indicate that the Eu<sub>0.56</sub>Ta<sub>2</sub>O<sub>7</sub> nanosheet is
crystalline and retains the layered perovskite structural feature of the bulk precursors. The most intense emission
is observed from the <sup>5</sup>D<sub>0</sub> → <sup>7</sup>F<sub>2</sub> transition of Eu<sup>3+</sup>. The intensity of this emission by the host excitation
exceeds 18 times that by the direct Eu<sup>3+</sup> excitation.
2008-02-07 00:00:00
Eu 0.56Ta
emission
host excitation
perovskite
High Intrananosheet Site Photoactivator ConcentrationHigh photoactivator concentration nanosheets Eu 0.56Ta
Eu 0.56Ta nanosheet
bulk precursors
chemical exfoliation reaction
AFM observation results
18 times
TEM
New Nanosheet Phosphor
tetrabutylammonium hydroxide