Visible to infrared energy conversion in Pr3+–Yb3+ co-doped fluoroindate glasses

Photoluminescence of Ag+ and Agn+m in co-doped Pr3+/Yb3+ fluorophosphate glasses: tuning visible emission and energy transfer to Pr3+/Yb3+ ions through excitation in different silver species

“…The persistence of a red component seems to confirm that, in the proposed materials, the potential de- Intensity (a.u) In this case, the excited Yb 3+ ion relaxes radiatively by emitting one photon and the 3 F4 → Pr 3+ level implies multiphonon de-excitation mechanism. (4) Depending on the system and concentration, back energy transfer from Yb 3+ to 1 G4 level of Pr 3+ can be observed [26,29,30]. These mechanisms may be easily accessed in the Figure 6.…”

“…The nature of the emitting levels of Pr 3+ strongly depends on the phonons energy of the host. Radiative de-excitation from 1 D2 level were reported in fluorophosphates [25], fluoroindate glasses [26], lead borate [27] glasses, as well as, oxyfluoride silicate glass-ceramics [28], whereas this level relaxes non radiatively down to the 1 G4 level in ZBLAN glass [29]. With the addition of silver ions, the Pr 3+ emissions decrease in intensity and a broadband rises, covering the region between 480 and 800 nm.…”

Upconversion Visible Light Emission in Yb/Pr Co-Doped Yttria-Stabilized Zirconia (YSZ) Single Crystals

“…The absorption spectra of the samples in the range of 800 to 1600 nm are shown in Figure 4b. The Yb 3+ absorption in the range of 900-1000 nm corresponds to the 2 F 7/2 → 2 F 5/2 transition, whilst the peak at 1400 nm corresponds to the 3 H 4 → 3 F 3,4 transition of Pr 3+ [20,29].…”

Up-conversion mechanisms in Er3+-doped fluoroindate glasses under 1550 nm excitation for enhancing photocurrent of crystalline silicon solar cell

“…Many efforts have been devoted to the study of luminescent properties of Er 3+ /Yb 3+ co-doped glass to increase the efficiency of SC through UC emissions [21][22][23]. Among the glass types, fluoroindate glasses are promising candidates due to their low phonon energy (5 00 cm −1 ) and large transparency window from 250 to 8000 nm, depending the chemical composition [24]. M. Rodríguez et al reported visible and near infrared UC emissions of an Er 3+ /Yb 3+ co-doped fluoroindate glasses upon 1480 nm excitation and showed an improvement of the short-circuit current by the visible and infrared emissions on a monocrystalline silicon plate [25].…”