Facile access to B-doped solid-state fluorescent carbon dots toward light emitting devices and cell imaging agents

Abstract

Carbon dots with solid-state fluorescence have been synthesized and applied for light emitting devices and bioimaging.

Gel‐like Carbon Dots: Characterization and their Potential Applications

“…To improve the fluorescence quantum yield, a variety of dopants including N, S, B, P, and Si have been added during the synthesis of CDs. In our experiment, we employed EDA as both a passivation agent and an N dopant.…”

“…To improve the fluorescenceq uantum yield, av ariety of dopantsi ncluding N, [25] S, [26] B, [27] P, [28] andS i [29] have been added during the synthesis of CDs. In our experiment,w ee mployed EDA as both ap assivation agent and an Nd opant.I t stabilizes the large surface area (relative to the particle volume) and diverse surface energy trappings ites of the CDs to improve the fluorescenceq uantum yield.…”

Solid‐State Carbon Dots with Efficient Cyan Emission towards White Light‐Emitting Diodes

“…[1,2] Studies have demonstrated that fluorescent CDs have ab road range of promising applications in bioimaging, [3][4][5] sensors, [6][7][8] photocatalyst [9,10] andw hite Light-Emitting Diodes (LEDs)e tc. [10][11][12][13][14][15][16][17][18][19] However,u pt on ow,a great number of studies have been focused on the synthesis and applicationso fa queous CDs, few attention wasp aid to solid powder CDs. This because CDs alwayss uffer severe luminescenceq uenching in solid powder form due to aggregation.…”

Photochemical synthesis of doped graphene quantum dots and their photoluminescence in aqueous and solid states

“…A shoulder at around 270 nm is found in the absorption spectrum of NGQDs, which can be attributed to characteristic n→π* transition of the C=N bond. 26 -28 This indicates the presence of defect energy states in NGQDs due to the incorporation of N. 7,26 Obvious excitation peaks at 280 and 320 nm are observed in the excitation spectra with monitoring emission at 440 and 500 nm, which indicates the presence of two excited energy states determining the emission. For the emission of 440 nm, there is a strong excitation peak at 320 and a relatively smaller peak at 280 nm.…”

“…5 Furthermore, most of the PL was detected from the colloid GQDs in past studies and fluorescence quenching may occur in the dry and aggregated state. 7,8 However, strong PL in solid stated GQDs is necessary for fabrication of advanced devices and other uses (e.g., inks and luminescence pattern printing). In addition, chemical doping is an effective way to tune the optical, chemical, and electronic properties of GQDs.…”