Table 16 CIE coordinate, color purity, and CCT of La2O3:Tm/Ho/Eu.

From: Energy transfer and multicolour photoluminescence in phosphors La2O3 doped by Tm3⁺, Ho3⁺, and Eu3⁺ for white LED and security applications

La2O3: Tm3+/Ho3+/Eu3+

Sr. No

Name

x

y

xd

yd

CCT (k)

Color Purity (%)

1

La2O3: Tm3+(1.5 mol%)/Ho3+(1.0 mol%)/Eu3+(1.0 mol%)

0.288

0.339

0.280

0.712

7778.77

8.00

2

La2O3: Tm3+(1.5 mol%)/Ho3+(1.0 mol%)/Eu3+(2.0 mol%)

0.311

0.360

0.280

0.712

6377.15

11.05

3

La2O3: Tm3+(1.5 mol%)/Ho3+(1.0 mol%)/Eu3+(3.0 mol%)

0.363

0.372

0.280

0.712

4759.22

19.38

4

La2O3: Tm3+(1.5 mol%)/Ho3+(1.0 mol%)/Eu3+(4.0 mol%)

0.376

0.326

0.704

0.296

3715.36

16.90

5

La2O3: Tm3+(1.5 mol%)/Ho3+(1.0 mol%)/Eu3+(5.0 mol%)

0.436

0.350

0.705

0.295

2497.06

32.97

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