Highly efficient and ultra-narrow bandwidth orange emissive carbon dots for microcavity lasers

Abstract

Orange emissive carbon dots with 82% PL quantum yield and 30 nm full width at half maximum are utilized as a laser gain medium to realize whispering gallery mode solid state lasers for the first time.

Deep Red Emissive Carbonized Polymer Dots with Unprecedented Narrow Full Width at Half Maximum

“…Narrow FWHM emission has significance in improving the imaging contrast with minimal background noise, increasing high color‐purity displays, and even serving as laser emission materials. [ 23,24 ] Most CDs possess multiple photoluminescence (PL) centers while the exact PL mechanism of CDs with narrow FWHM is still unclear. [ 3,14,25,26 ] The current CDs also suffer from “color barrier” and color impurity due to the wide FWHM.…”

Ultralow Threshold Lasing from Carbon Dot–Ormosil Gel Hybrid-Based Planar Microcavity

“…Recently, fluorescence nanomaterials have been applied in a number of technologies such as biosensing, photoelectric devices, light emitting diodes, lasers, multiplexed imaging, and so forth because of their excellent luminescent properties [ 1 , 2 , 3 , 4 , 5 ]. Among them, carbon dots (CDs) have attracted increasing interest as novel fluorescent nanomaterials due to their outstanding properties, such as great biocompatibility, upconversion photoluminescence (UCPL), high quantum yields (QYs), excellent photostability, easy surface functionalization, and environmental sustainability [ 6 , 7 , 8 , 9 ]. Thus, CDs have already been regarded as one kind of potential alternative for traditional semiconductor materials in various technologies, including photoelectric devices and sensors photocatalysis, lasing emission, etc.…”

“…Thus, CDs have already been regarded as one kind of potential alternative for traditional semiconductor materials in various technologies, including photoelectric devices and sensors photocatalysis, lasing emission, etc. [ 7 , 10 , 11 , 12 , 13 ]. Typically, these applications usually require materials in solid states owing to significant stability and practical applications.…”

Facile synthesis of novel dopamine-modified glass fibers for improving alkali resistance of fibers and flexural strength of fiber-reinforced cement

“…2e) which could be originated from R-NH 2 (399.5 eV) and C-N (400.2 eV) in amine species and cyclization of polydopamine. [50][51][52] Also in O 1s spectrum two characteristic peaks were displayed (Fig. 2f) which accounted for C]O (531.0 eV) and O-Si-O/C-O (532.7 eV).…”