Effect of Eu³⁺ Concentration on Luminescence Studies of Y₄Al₂O₉ Phosphor

Table 1

PL emission intensities for different excitations.

S. number	Sample name	𝜆exe	𝜆emi	Intensity
1	Y4Al2O9:Eu (0.1%)	254	468, 594, 612, 624	46, 42, 17, 14
2	Y4Al2O9:Eu (0.2%)	254	468, 583, 591, 612, 624, 629	72, 55, 69, 121, 71, 62
		265	468, 583, 591, 612, 624	67, 26, 35, 53, 27
3	Y4Al2O9:Eu (0.5%)	265	468, 583, 591, 612, 624, 629	68, 95, 123, 247, 162, 147
		254	468, 583, 591, 612, 624, 629	74, 91, 112, 189, 125, 115
4	Y4Al2O9:Eu (1%)	254	468, 583, 591, 612, 624, 629	76, 90, 122, 269, 136, 124
		265	468, 583, 591, 612, 624, 629	76, 183, 260, 599, 352, 316
5	Y4Al2O9:Eu (1.5%)	265	468, 583, 591, 612, 624, 629	69, 158, 222, 504, 318, 277
		254	468, 583, 591, 612, 624, 629	93, 157, 204, 527, 256, 223
6	Y4Al2O9:Eu (2%)	254	468, 583, 591, 612, 624, 629	95, 129, 181, 436, 221, 193
		265	468, 583, 591, 612, 624	67, 26, 35, 53, 27
7	Y4Al2O9:Eu (2.5%)	254	468, 583, 591, 612, 624, 629	65, 141, 223, 454, 229, 213