Conversion of broadband UV-visible light to near infrared emission by Ca₁₄Zn₆Al₁₀O₃₅: Mn⁴⁺, Nd³⁺/Yb³⁺

Abstract

Efficient Ca14Zn6Al10O35: Mn4+, Nd3+/Yb3+ spectral conversion materials have been prepared by a sol–gel method.

Raman scattering and red emission of Mn4+ in La0.7Sr0.25Na0.05Mn0.7Ti0.3O3 manganite phosphor for LED applications

“…These peaks originate from the charge transfer transition of Mn 4+ -O 2À and spin-allowed transitions of Mn 4+ : 4 A 2g / 4 T 1g , 4 A 2g / 4 T 2g (see in inset Fig. 5), the same behavior as reported previously by X. Gao et al 45 The working temperature of polycrystalline LSNMT manganite will be lower than the room temperature.…”

“…This suggests the same behavior as reported in other research works, such as on Mn 4+ -doped glasses. 44,45…”

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

“…The excitation/emission and energy transfer pathways for the Mn 4+ and codoped Nd 3+ /Yb 3+ ion couples in CZAO are quite similar to that in the host lattice of CZGO. 14,49 NIR emissions from Nd 3+ /Yb 3+ have been observed in Mn 4+ and Nd 3+ /Yb 3+ codoped CZAO phosphors. The intensity of the NIR emissions of Nd 3+ /Yb 3+ increases initially with an increase in the content of rare earth ions Nd 3+ /Yb 3+ , and then decreases gradually as a result of concentration quenching.…”

“…In the Mn 4+ and Er 3+ coped GZT sample, efficient energy transfer from Mn 4+ to Er 3+ was observed, and the mechanism is quite similar to that in Mn 4+ and Er 3+ codoped CZAO. 14 It can be seen from Fig. 11a that the emission spectrum of Gd 2 ZnTiO 6 :yMn 4+ ,0.02Er 3+ (y ¼ 0, 0.002) is excited at 335 nm, corresponding to the 4 A 2g / 4 T 1g of Mn 4+ , and in that of Gd 2 -ZnTiO 6 :0.002Mn 4+ ,2xEr 3+ (x ¼ 0, 0.005) are excited at 379 nm, corresponding to 4 A 2g / 4 T 1g of Mn 4+ and 4 I 15/2 / 4 G 11/2 of Er 3+ .…”

“…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.…”