Visible to infrared emission from (Eu3+/Nd3+):B2O3 + AlF3 + NaF + CaF2 glasses for luminescent solar converters

Tunable Broadband NIR PL Emissions with (Nd3+/Er3+) Codoped TiO2 via Synergetic Energy Transfer

“…In contrast, Figure b presents the strong excitation band when the Er 3+ doping concentration is increased, suggesting that the energy may transfer from Er 3+ to Nd 3+ in region I. This finding corroborates a report revealing a similar mechanism . Additionally, Figure a depicts intense emissions in region II/III, while Figure b shows a quenching effect in region II/III, implying the energy transfer from Nd 3+ to Er 3+ .…”

“…Er 0.003 Nd 0.004 Ti 0.993 O 2 showed a strong Raman peak at 142 cm –1 , hoping for better photonics applications. Raman scattering intensity is proportional to electronic polarization, and as a result (Er/Nd) could have electron–phonon solid coupling …”

“…This finding corroborates a report revealing a similar mechanism. 49 Additionally, Figure 5a depicts intense emissions in region II/III, while Figure 5b shows a quenching effect in region II/III, implying the energy transfer from Nd 3+ to Er 3+ . The resulting excitation spectra provide information about the ET from Nd to Er and from Er to Nd.…”

“…Raman scattering intensity is proportional to electronic polarization, and as a result (Er/Nd) could have electron−phonon solid coupling. 49…”

“…There are a variety of sensitizers that can be utilized in order to boost its sensitivity in the NIR spectrum, including Ce 3+ , Eu 3+ , Bi 3+ , Yb 3+ , and Er 3+ . − This combination of activator and sensitizer would significantly boost NIR emissions while maintaining an incredibly high energy transfer efficiency. Strontium fluoride (SrF 2 ) host and Nd 3+ /Cr 3+ codoped CGGG phosphors demonstrated increased NIR emissions via the ET mechanism, with the ensuing NIR response, which attributes to NIR light sources and imaging. , Eu 2+ /Nd 3+ pair dopants in (BFanc: B 2 O 3 + AlF 3 + NaF + CaF 2 ) glasses, (Tm 3+ /Yb 3+ ) doped oxyfluoride glasses, the (Tb 3+ /Yb 3+ ) pair in Na 5 Lu 5 F 32 host, the (Eu 2+ :Nd 3+ ) pair in K 2 SrCl 4 host, etc., demonstrated a significant increase in light energy transfer from blue to near-infrared photons, which was attributed to the performance of CIS, CIGS, and C–Si-solar cells. − The combination of Er 3+ and Nd 3+ dopants has received substantial interest due to their large emission bands in the near-infrared to mid-infrared (850 nm to 1700 nm) region and the benefit of ET between Nd 3+ and Er 3+ . There are few reports that present the advantages of using Er and Nd in combination for the NIR PL spectral responses.…”