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Table 1 Comparison of upconversion coefficients in different host materials

From: Highly Efficient Near-IR Photoluminescence of Er3+ Immobilized in Mesoporous SBA-15

Host N(ions/cm3) C(×10−18cm3/s)
Yb-Er-SBA-15 2.71 × 1020 0.9–1.1
Phosphate [17] 2 × 1019-4 × 1020 0.8–1.1
Soda-lime silicate waveguide [17] 1 × 1020 3.8
Er-implanted Al2O3 waveguide [17] 1.2 × 1020 4
Alumino-silicate [17] 7 × 1019-4 × 1020 0.5–2