Highly luminescent perovskite quantum dots for light-emitting devices: photopatternable perovskite quantum dot–polymer nanocomposites

Abstract

Photopatternable perovskite quantum dot–polymer composites with feature sizes as small as 3.86 μm are prepared for light-emitting applications.

High-Reliability Perovskite Quantum Dots Using Atomic Layer Deposition Passivation for Novel Photonic Applications

“…When QDs are subjected to external stimuli, such as light, hot water, oxygen, etc., the surface ligands are easily peeled off, resulting in the phenomenon of fluorescence quenching and causing a significant drop in the photoluminescence quantum yield (PLQY) [ 49 , 50 ]. This study referred to Chen et al’s ligand-assisted re-precipitation (LARP) method for synthesizing QDs [ 40 ]. The aggregation phenomena of QDs and surface defects of QDs induced by the dissolution crystallization method were monitored using post-synthesis optimization processing technology.…”

“…In this study, a PQD film with high reliability was developed. First, see Chen et al’s synthesis of FAPbBr 3 QDs [ 40 ]. FAPbBr 3 QDs were synthesized using the ligand-assisted re-precipitation (LARP) method at room temperature [ 40 , 41 ].…”

“…First, see Chen et al’s synthesis of FAPbBr 3 QDs [ 40 ]. FAPbBr 3 QDs were synthesized using the ligand-assisted re-precipitation (LARP) method at room temperature [ 40 , 41 ]. First of all, 500 μL of oleic acid (OA), 0.16 mmol formamidinium bromide (FABr), 0.2 mmol lead (Ⅱ) iodide (PbBr 2 ), and 20 μL of octylamine were mixed.…”

Intrinsic stability of perovskite materials and their operational stability in light-emitting diodes

“…Organic-inorganic hybrid perovskite (OIHP) hybrids have attracted researchers' attention around the globe for various optoelectronic applications such as photovoltaics, photosensors, light emitting diodes (LEDs), transistors, and others. [1][2][3][4] These hybrids possess excellent properties such as narrow band emissions (full width at half maximum B20 nm), spectral tunability of the entire visible range, high charge carrier mobility, high photoluminescence quantum yield (PLQY), strong quantum confinement, long charge carrier diffusion length, tunability of properties via doping and others. Interestingly, the OIHP hybrids with desirable properties can replace the present conventional materials such as InN, GaN, AlN, polymers, organic materials, and others for next generation flexible and smart electronic devices.…”

Methylammonium Cation-Regulated Controllable Preparation of CsPbBr3 Perovskite Quantum Dots in Polystyrene Fiber with Enhanced Water and UV Light Stabilities

“…Lead halide perovskites have been applied in various optoelectronic devices, including solar cells, light-emitting diodes (LEDs) and micro-LEDs, and photodetectors, due to their excellent photophysical properties, such as high photoluminescence quantum yield, narrow full width at half-maximum, tunable emission in the full spectral range, and high carrier mobility efficiency . The structural formula of the lead halide perovskite is written as ABX 3 , where A = MA + (CH 3 NH 3 + ), FA + (CHN 2 H 4 + ), or Cs + , B = Pb 2+ , and X = Cl – , Br – , or I – .…”