2020
DOI: 10.1007/s10853-020-05578-3
|View full text |Cite
|
Sign up to set email alerts
|

Temperature-dependent Raman investigation and photoluminescence of graphene quantum dots with and without nitrogen-doping

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
1
1
1

Citation Types

0
8
0

Year Published

2021
2021
2024
2024

Publication Types

Select...
9

Relationship

0
9

Authors

Journals

citations
Cited by 13 publications
(8 citation statements)
references
References 59 publications
0
8
0
Order By: Relevance
“…The first Raman peak in GQDs, the G band is an in-plane vibration of C=C sp 2 hybridized carbon atoms, which belongs to the E 2g irreducible representation. In addition to the identified G peak, the defect-induced D peak which originates from the “unorganized” carbon associated with the defects or edges of graphene [ 24 , 31 ]. The type of edge configuration of GQDs can be determined by the intensity of D band.…”
Section: Resultsmentioning
confidence: 99%
“…The first Raman peak in GQDs, the G band is an in-plane vibration of C=C sp 2 hybridized carbon atoms, which belongs to the E 2g irreducible representation. In addition to the identified G peak, the defect-induced D peak which originates from the “unorganized” carbon associated with the defects or edges of graphene [ 24 , 31 ]. The type of edge configuration of GQDs can be determined by the intensity of D band.…”
Section: Resultsmentioning
confidence: 99%
“…The intensity of the D-Band is therefore linked to “edge” carbon atoms, which introduce imperfections in the lattice, or more generally to structural modifications due to doping atoms; in the G-Band, the intensity is due to carbon atoms engaged in double bonds or aromatic rings. The intensity ratio (ID/IG) between the two peaks is an estimate of the disorder of the structure with respect to the graphitic lattice [ 28 , 29 ]. In our case, the ratio is 1.7, showing a relatively high amount of defects.…”
Section: Resultsmentioning
confidence: 99%
“…N-GQDs were synthesized from pyrene via a hydrothermal method, using urea as the source of doping nitrogen following a previous report [42]. Firstly, a mixture of 2 g pyrene (98%, HPLC) in 160 mL of HNO 3 (68%) was refluxed at 80 • C and stirred for 12 h. Then, the mixture was cooled to room temperature, diluted in deionized water, and filtered through a 0.22 mm microporous membrane to remove the acid.…”
Section: Preparation Of Nitrogen-doped Graphene Quantum Dotsmentioning
confidence: 99%
“…The properties of ETLs have been modified by doping them with carbon-based nanomaterials such as carbon nanodots, graphene, or graphene quantum dots (GQDs), providing an effective strategy for adjusting the optical and electron transfer properties of ETLs [39][40][41]. Nitrogen-doped graphene quantum dots (N-GQDs) are derivatives of graphene quantum dots, which have a unique quantum confinement and size effect and have thus attracted increasing interest as a promising candidate in photoelectric sensing and various photovoltaic application prospects [42][43][44].…”
Section: Introductionmentioning
confidence: 99%