Room-Temperature Synthesis of Air-Stable Near-Infrared Emission in FAPbI3 Nanoparticles Embedded in Silica

Abstract

Hybrid organic−inorganic and all-inorganic metal halide perovskite nanoparticles (PNPs) have shown their excellent characteristics for optoelectronic applications. We report an atmospheric process to embed formamidinium CH(NH2)2PbI3 (FAPbI3) PNPs in silica protective layer at room temperature (approximately 26 °C) employing (3-aminopropyl) triethoxysilane (APTES). The resulting perovskite nanocomposite (PNCs) achieved a high photoluminescence (PL) quantum yield of 58.0% and good stability under atmospheric moisture conditions. Moreover, the PNCs showed high PL intensity over 1 month of storage (approximately 26 °C) and more than 380 min of PNCs solutions in DI water. The studied near-infrared (NIR) light-emitting diode (LED) combined a NIR-emitting PNCs coating and a blue InGaN-based chip that exhibited a 788 nm electroluminescence spectrum of NIR-LEDs under 2.6 V. This may be a powerful tool to track of muscle and disabled patients in the detection of a blood vessel.

Facile and Unplugged Surface Plasmon Resonance Biosensor with NIR-Emitting Perovskite Nanocomposites for Fast Detection of SARS-CoV-2

“…The XRD measurement at room temperature was performed over a 2θ range from 10 to 50° with a step size of 0.015°. Figure b shows the XRD spectrum of the prepared FAPbI 3 PNCs, and the appeared peaks are corresponding to the cubic structure of α-FAPbI 3 . It can be observed in Figure b that the sharp diffraction peaks and no impurity peaks specify that good crystallinity of FAPbI 3 PNCs is retained after APTES modification.…”

“…A facile method to synthesize NIR-emitting FAPbI 3 PNCs at room temperature has been demonstrated in our previous study . Specifically, 0.1041 g of formamidine acetate (FA, 99%) was added to 10 mL of octanoic acid to prepare FA precursor solution with stirring at 900 rpm and at room temperature (25 °C) until a clear colorless solution was obtained.…”

“…A facile method to synthesize NIR-emitting FAPbI 3 PNCs at room temperature has been demonstrated in our previous study. 27 Specifically, 0.1041 g of formamidine acetate (FA, 99%) was added to 10 mL of octanoic acid to prepare FA precursor solution with stirring at 900 rpm and at room temperature (25 °C) until a clear colorless solution was obtained. Subsequently, lead(II) iodide (PbI 2 ) solution was prepared by adding 0.231 g of lead(II) iodide (99.999%) to a mixture of 5 mL of toluene (98%), 0.5 mL of oleic acid (OA, 90%), and 0.5 mL of oleylamine (OAM, 90%), and then the solution was heated to 80 °C, and stirred at 900 rpm for 1 h until the solution was clear and pale yellow.…”

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

“…In addition, as shown in Figure S1a the OA/OAm ligands. 25,26 In TOPO-passivated the stretching signals of OA/OAm ligands diminished, indicating the partial substitution of OA and OAm ligands as a result of the extremely dynamic binding between FAPbI 3 NIPQDs and ligands caused by the characteristic of an ionic bond of FAPbI 3 NIPQDs. 27 X-ray diffraction (XRD) was used to further analyze the effect of TOPO on the crystal structure of FAPbI 3 NIPQDs.…”

A Low-Cost Synthetic Route of FAPbI3 Quantum Dots in Air at Atmospheric Pressure: The Role of Zinc Iodide Additives

“…Beyond photovoltaics, FAPbI 3 has also shown a large potential in lighting and displays, owing to the high brightness and good color purity [ 11 ]. More recently, the quantum dot (QD) form of FAPbI 3 has emerged as a promising material for next optoelectronic devices [ 12 , 13 , 14 ]. It additionally possesses many unique features from quantum dots such as wide tunable absorption range, multiple exciton generation, and high compatibility with a large-scale fabrication process [ 15 ].…”