Broadband conversion of visible light to near-infrared emission by Ce^3+, Yb^3+-codoped yttrium aluminum garnet

Abstract

We show that Ce(3+) can be an efficient sensitizer for Yb(3+) in the host lattice of yttrium aluminum garnet (YAG). With blue-light excitation to induce the 4f-->5d transition of Ce(3+), characteristic near-IR emission of Yb(3+) due to transition of (2)F(5/2)-->(2)F(7/2) peaking at 1030 nm is generated as a result of energy transfer from Ce(3+) to Yb(3+). The result of spectral evolution with temperature indicates that the efficiency of energy transfer is enhanced owing to thermal effect. This evidence implies that the phonon-assisted process participates in the downconversion of YAG: Ce(3+), Yb(3+).

Enhanced 2.0μm emission and energy transfer in Yb3+/Ho3+/Ce3+ triply doped tellurite glass

“…It can be seen from Fig. 1 that the addition of Ce 3+ ions into the glass matrix results in a red-shift of the UV-side absorption edge, and this is assigned to the 4f → 5d transition in Ce 3+ ions which causes a broad absorption around 400-500 nm [20][21][22].…”

Synthesis and luminescent properties of Eu3+/Eu2+ co-doped calcium aluminosilicate glass–ceramics

“…The long lifetime is about the same in the G and GC48 ( $1-1.4 ms). The average luminescence lifetime can be derived from the following equation [43]:…”

Near-infrared quantum cutting of Ce3+–Nd3+ co-doped Y3Al5O12 crystal for crystalline silicon solar cells

“…7. Generally speaking, the 5d 2 ( 2 B 1g ) energy state could relax to lower 5d 1 ( 2 A 1g ) level easily and then transmitted to 2 F 5/2 rapidly [14,21]. Based on the analysis, the energy transfer between Ce 3+ and Nd 3+ was presumed as follow:…”

“…5d transition lies in a broad spectral range and the energy of the transition changes with different crystal field strength of the matrix. Recent studies have demonstrated that Ce 3+ -doped YAG matrix has a strong and broad absorption from 350 nm to 550 nm accordance with the strongest emission of solar spectrum [21,22], furthermore, the 5d 1 ( 2 A 1g ) level of Ce 3+ is as twice as the 4 F 3/2 ! 4 I 11/2 transition of Nd 3+ , which is possible to realize efficiency DC.…”