Table 15 CIE coordinate, color purity, and CCT of La2O3: Ho/Eu.

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

La2O3: Ho3+/Eu3+

Sr. No

Name

x

y

xd

yd

CCT (k)

Color Purity (%)

1

La2O3: Ho3+(1.5 mol%)/Eu3+(1.0 mol%)

0.422

0.572

0.273

0.718

5093.73

69.20

2

La2O3: Ho3+(1.5 mol%)/Eu3+(2.0 mol%)

0.432

0.563

0.273

0.718

4723.46

68.22

3

La2O3: Ho3+(1.5 mol%)/Eu3+(3.0 mol%)

0.442

0.552

0.266

0.724

4313.94

65.88

4

La2O3: Ho3+(1.5 mol%)/Eu3+(4.0 mol%)

0.489

0.507

0.704

0.296

2918.75

66.32

5

La2O3: Ho3+(1.5 mol%)/Eu3+(5.0 mol%)

0.497

0.499

0.704

0.296

2504.35

66.29

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