Room temperature synthesis of highly stable near-infrared FAPbI3@TEOS perovskite phosphor for NIR light-emitting diodes

Application of a Perovskite NIR-LED with Highly Stable FAPbI3@SiO2 Core–Shell Nanocomposites in a SPR Sensing Platform

“…Moreover, the maximal PLQY measured for the FAPbI 3 @SiO 2 core−shell NCs was approximately 72.4%, which was discussed in our previous study as a result of reducing non-radiative defects in FAPbI 3 NIPQDs via SiO 2 encapsulation. 21,37 Figure 8b shows the results of XRD measurements on the two samples. The FAPbI 3 @SiO 2 core−shell NCs exhibit distinct peaks at 13.9°, 28.1°, 31.5°, 40.1°, and 42.7°, which correspond to the cubic perovskite phase (001), ( 002), (012), and (003) diffraction peaks.…”

“…Subsequently, the TOPO solution was injected into the FAPbI 3 NIPQDs initial solution, which resulted in the formation of a TOPO-passivated FAPbI 3 NIPQDs initial solution. The initial solution was then subjected to a purification procedure consisting of steps similar to those described previously …”

“…NIR light-emitting diodes (NIR-LED) are manufactured based on our previous research . The synthesized FAPbI 3 @SiO 2 phosphor powder was utilized for the deposition of NIR color-conversion gels onto NIR-LED.…”

“…The initial solution was then subjected to a purification procedure consisting of steps similar to those described previously. 21 Preparation of FAPbI 3 @SiO 2 Core−Shell NCs NIR Phosphor Powder. After the reaction was complete, the TOPO-passivated FAPbI 3 NIPQDs initial solution was exposed to oxygen under ambient conditions.…”

“…NIR light-emitting diodes (NIR-LED) are manufactured based on our previous research. 21 The synthesized FAPbI 3 @SiO 2 phosphor powder was utilized for the deposition of NIR color-conversion gels onto NIR-LED. A total of 0.3 g of the prepared NIR-phosphor powder was blended with 0.45 g of UV resin in a ratio of 1:1.5 (NCs to UV resin) using a stirrer (MAZERUSTAR KK-50S, Osaka, Japan).…”