Table 1 The integrated UC intensities of particular emission bands, their ratios and CIE chromaticity coordinates of synthesized β-NaYF4:Er3+,Yb3+ CNP.

From: Fabrication and characterization of up-converting β-NaYF4:Er3+,Yb3+@NaYF4 core–shell nanoparticles for temperature sensing applications

Laser power density (W/cm2)

Relative integrated intensities

CIE

2H11/2, 4S3/2 → 4I15/2

4F9/2 → 4I15/2

IGreen/IRed

x

y

0.73

22.95

77.05

0.30

0.337

0.331

1.59

21.70

78.30

0.28

0.343

0.339

3.02

17.02

82.98

0.21

0.358

0.348

4.19

11.80

88.20

0.13

0.379

0.349

5.34

9.85

90.15

0.11

0.396

0.349

6.50

10.27

89.73

0.11

0.401

0.355

7.64

9.45

90.55

0.10

0.412

0.352

8.80

9.31

90.69

0.10

0.416

0.355

9.95

9.35

90.65

0.10

0.409

0.356

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