Carbon‐Based Quantum Dots with Solid‐State Photoluminescent: Mechanism, Implementation, and Application. Issue 48 (3rd November 2020)

• Record Type: Journal Article
• Authors: Xu, Anli; Wang, Gang; Li, Yongqiang; Dong, Hui; Yang, Siwei; He, Peng; Ding, Guqiao
• Is Part Of: Small. Volume 16:Issue 48(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-11-03
• Subjects: carbon dots -- delay fluorescence -- graphene quantum dots -- phosphorescence -- solid‐state photoluminescence; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.202004621
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract: Carbon‐based quantum dots (CQDs), including spherical carbon dots and graphene quantum dots, are an emerging class of photoluminescent (PL) materials with unique properties. Great progress has been made in the design and fabrication of high‐performance CQDs, however, the challenge of developing solid‐state PL CQDs have aroused great interest among researchers. A clear PL mechanism is the basis for the development of high‐performance solid‐state CQDs for light emission and is also a prerequisite for the realization of multiple practical applications. However, the extremely complex structure of a CQD greatly limits the understanding of the solid‐state PL mechanism of CQDs. So far, a variety of models have been proposed to explain the PL of solid‐state CQDs, but they have not been unified. This review summarizes the current understanding of the solid‐state PL of solid‐state CQDs from the perspective of energy band theory and electronic transitions. In addition, the common strategies for realizing solid‐state PL in CQDs are also summarized. Furthermore, the applications of CQDs in the fields of light‐emitting devices, anti‐counterfeiting, fingerprint detection, etc., are proposed. Finally, a brief outlook is given, highlighting current problems, and directions for development of solid‐state PL of CQDs. Abstract : The complex structure of carbon‐based quantum dots (CQDs) limits the understanding of the solid‐state photoluminescent (PL) mechanism of CQD. This review summarizes research actuality for the solid‐state PL mechanism of CQD from the perspective of energy band theory and electronic transitions. This review also summarizes the common strategies to implement solid‐state PL in CQD and proposes the applications of CQD.