Near-Infrared Emission of Er³⁺ Sensitized by Mn⁴⁺ in Ca₁₄Zn₆Al₁₀O₃₅ Matrix

Abstract

A novel near-infrared luminescent material Ca14Zn6Al10O35:Mn4+, Er3+ has been synthesized by a sol–gel method. The Ca14Zn6Al10O35:Mn4+, Er3+ phosphor exhibits strong near-infrared emission around 1540 nm with a wide excitation band extending from 250 to 550 nm. Efficient energy transfer from Mn4+ to Er3+ in Ca14Zn6Al10O35 is observed and gives about 13 times enhancement on the Er3+-1540 nm emission excited at 455 nm, which makes it convenient to obtain high-power emission by commercial GaN LED pumping. The energy transfer mechanism is discussed based on Dexter’s theory and Inokuti–Hirayama/Yokota–Tanimoto models. It is believed that a dipole–dipole interaction between Mn4+ and Er3+ ions is responsible for the large enhancement of 1540 nm emission.

An efficient far‐red emission Sr2InSbO6:Mn4+, M (M = Li+, Na+, and K+) phosphors for plant cultivation LEDs

“…To study the mechanism of energy transfer further, the Inokuti–Hirayama (I‐H) model was used to deal with the luminescence decay curves 41 . The model is giving as follows: 42 where I ( t ) and I 0 are the luminescence intensity at time t and 0, respectively, and τ 0 is the intrinsic lifetime of Mn 4+ ; the energy transfer parameter of Q can be defined as: where C A is the concentration of Mn 4+ , and C DA represents the energy transfer micro‐parameter; Γ(x) is the gamma function, .…”

“…To study the mechanism of energy transfer further, the Inokuti-Hirayama (I-H) model was used to deal with the luminescence decay curves. 41 The model is giving as follows: 42 𝐼 (𝑡) = 𝐼 0 (𝑡) exp…”

A review on the structural dependent optical properties and energy transfer of Mn4+ and multiple ion-codoped complex oxide phosphors

“…13 The NIR photoluminescence maxima at 1064, 1537, and 980 nm originating from Nd 3+ /Er 3+ /Yb 3+ ions can be sensitized by Mn 4+ with excitation in the UV-vis region (200-500 nm). [13][14][15][16] The conversion of UV-vis light into NIR light at about 1064 nm through energy transfer from Mn 4+ to multiple ions is desirable to improve the conversion efficiency of solar cells by coating the phosphor layer on the surface of a crystalline Si layer.…”

Tunable luminescence and energy transfer properties of Bi3+ and Mn4+ co-doped Ca14Al10Zn6O35 phosphors for agricultural applications

“…Recently, several phosphors based on the host lattice CAZO have been identied as good candidates in various photoelectricity applications with high luminescence efficiency, chemically and physically stable characteristics, ease of synthesis, and low cost of raw materials. [16][17][18][19][20] Even though the luminescent properties of rare earth ions and Mn 4+ in the host lattice CAZO have been extensively studied, blue emission luminescence from Bi 3+ in CAZO has not been observed. It is worth investigating the efficient energy transfer between the two transition metal ions Bi 3+ and Mn 4+ owing to the energy match between the 3 P 1 (Bi 3+ ) and 2 E (Mn 4+ ) levels.…”