Carbon-Based Quantum Dots with Solid-State Photoluminescent: Mechanism, Implementation, and Application

Anli Xu; Gang Wang; Yongqiang Li; Hui Dong; Siwei Yang; Peng He; Guqiao Ding

doi:10.1002/smll.202004621

Carbon-Based Quantum Dots with Solid-State Photoluminescent: Mechanism, Implementation, and Application

Small. 2020 Dec;16(48):e2004621. doi: 10.1002/smll.202004621. Epub 2020 Nov 3.

Authors

Anli Xu^{1

2}, Gang Wang^{1

2

3}, Yongqiang Li^{1

2}, Hui Dong^{1

2}, Siwei Yang^{1

2}, Peng He^{1

2}, Guqiao Ding^{1

2}

Affiliations

¹ State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, CAS Center for Excellence in Superconducting Electronics, Chinese Academy of Sciences, Shanghai, 200050, P. R. China.
² College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
³ Department of Microelectronic Science and Engineering, School of Physical Science and Technology, Ningbo University, Ningbo, 315211, P. R. China.

PMID: 33145929
DOI: 10.1002/smll.202004621

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.

Keywords: carbon dots; delay fluorescence; graphene quantum dots; phosphorescence; solid-state photoluminescence.

Publication types

Review
Research Support, Non-U.S. Gov't