Insights into photoluminescence mechanisms of carbon dots: advances and perspectives

被引：416

作者：

Ai, Lin ^{[1
]}

Yang, Yisen ^{[1
]}

Wang, Boyang ^{[1
]}

Chang, Junbiao ^{[1
]}

Tang, Zhiyong ^{[3
,4
]}

Yang, Bai ^{[2
]}

Lu, Siyu ^{[1
]}

机构：

[1] Zhengzhou Univ, Coll Chem, Green Catalysis Ctr, Zhengzhou 450001, Peoples R China

[2] Jilin Univ, Coll Chem, State Key Lab Supramol Struct & Mat, Changchun 130012, Peoples R China

[3] Zhengzhou Univ, Henan Inst Adv Technol, Zhengzhou 450001, Peoples R China

[4] Natl Ctr Nanosci & Technol, CAS Ctr Excellence Nanosci, CAS Key Lab Nanosyst & Hierarch Fabricat, Beijing 100190, Peoples R China

来源：

SCIENCE BULLETIN | 2021年 / 66卷 / 08期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Carbon dots; Photoluminescence mechanisms; Surface state; Molecular state; Crosslink-enhanced emission;

D O I：

10.1016/j.scib.2020.12.015

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Carbon dots (CDs) are potentially useful in many areas such as bioimaging, light-emitting diodes, and sensing because of their excellent optical properties, high biocompatibility, and low toxicity. Knowledge of their photoluminescence (PL) mechanisms, which have been widely studied, is of significance in guiding the synthesis and promoting applications of CDs with tunable PL emissions. However, the intrinsic mechanism of PL emission remains unclear, and a unified mechanism has not been found because of differences in particle structures. This review generalizes the categories of CDs, noting their structural diversity. Three types of PL mechanism pertaining to structural differences are outlined: internal factors dominated emission (including the conjugation effect, the surface state, and the synergistic effect), external factors dominated emission (including the molecular state and the environment effect), and crosslink-enhanced emission. Optical applications of CDs are also briefly mentioned. Finally, the prospects for research into PL mechanisms are discussed, noting the remaining challenges and directions for future work. ? 2020 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved.

引用

页码：839 / 856

页数：18

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