Enhancement of the Spontaneous Emission Rate of Perovskite Nanowires Coupled into Cylindrical Hollow Nanocavities Formed on the Surface of Polystyrene Microfibers

Abstract

Fluorescent CsPbBr3 nanowires are uniformly integrated into a porous polystyrene matrix in the form of microfibers to investigate the changes in their spontaneous emission rate. Cylindrical hollow nanocavities, ranging from 75 to 160 nm in diameter, are grown on the surface of the polymer microfibers during the fabrication process, which allow coupling light that is emitted from the excited CsPbBr3 nanowires. Time-resolved experiments elucidate that the spontaneous emission rate of the perovskite nanowires is observed to increase by a factor of 4.9, upon coupling of the excited optical modes into the nanocavities, which is demonstrated to be in good agreement with our theoretical calculations.

Controlling Spontaneous Emission from Perovskite Nanocrystals with Metal–Emitter–Metal Nanostructures

“…We found good agreement between our calculation and our experimental results. In addition, we have shown that a simple plasmonic cavity based on single or double gold films can be used as a platform to study light-matter interaction, particularly in solution-processable perovskite NCs, which can be used for sensing application [17,18].…”

“…We obtained 1.2-fold and 1.9-fold PL intensity ratios (PLR) for CsPbBr 3 and FAPbBr 3 NCs, respectively, whereas the emission rate enhancements are 4.3-fold and 5.4-fold for CsPbBr 3 and FAPbBr 3 NCs, respectively. Manipulation of the spontaneous emission rate by simple plasmonic nanostructures can be utilized in sensing and detection applications [17,18]. Furthermore, such simple structures with large emission enhancement factors will improve the brightness for light-emitting devices (LED) applications and improve the signal modulations in telecommunication technologies.…”

Controlling Spontaneous Emission from Perovskite Nanocrystals with Metal-Emitter-Metal Nanostructures

“…We found good agreement between our calculation and our experimental results. In addition, we have shown that a simple plasmonic cavity based on single or double gold films can be used as a platform to study light-matter interaction, particularly in solution-processable perovskite NC, which can be used for sensing application [17,18].…”

“…We obtained 1.2-fold and 1.9-fold intensity enhancement for CsPbBr3 and FAPbBr3 NC respectively; whereas the emission rate enhancements are 4.3-fold and 5.4-fold for CsPbBr3 and FAPbBr3 NC respectively. Manipulation of the spontaneous emission rate by simple plasmonic nanostructures can be utilized in sensing and detection applications [17,18]. Furthermore, such simple structures with large emission enhancement factors will improve the brightness for light-emitting devices (LED) applications and improve the signal modulations in telecommunication technologies.…”

Controlling Spontaneous Emission from Perovskite Nanocrystals with Metal-Emitter-Metal Nanostructures

“…We obtained 1.2fold and 1.9-fold intensity enhancement for CsPbBr3 and FAPbBr3 nanocrystals respectively; whereas the emission rate enhancements are 4.3-fold and 5.4-fold for CsPbBr3 and FAPbBr3 nanocrystals respectively. Manipulation of the spontaneous emission rate by simple plasmonic nanostructures can be utilized in sensing and detection applications [17,18]. Furthermore, such simple structures with large emission enhancement factors will improve the brightness for light-emitting devices (LED) applications and improve the signal modulations in telecommunication technologies.…”