Formation and Band Gap Tuning Mechanism of Multicolor Emissive Carbon Dots from m‐Hydroxybenzaldehyde

• DOI: 10.1002/advs.202300543
• Publication Date: 2023-04-22T03:11:34Z
• Authors: Yan Li; Can Liu; Hao Sun; Menglin Chen; Defa Hou; Yunwu Zheng; Haijiao Xie; Bei Zhou; Xu Lin
• Keywords: Carbon fibers; Carbon Quantum Dots

Abstract Reported in 2004, carbon dots (CDs) have been widely used various fields due to their excellent optical properties. However, the mechanism of fluorescence modulation is still a controversial issue, which also seriously affects further development dots. In this paper, m ‐hydroxybenzaldehyde as raw material obtain multicolor luminescent CDs by pyrolysis under different reaction conditions, thereby revealing forbidden band tuning and formation CDs. Different acid–base conditions lead paths precursors, forming molecular fluorophores with conjugated structures, aggregate eventually form enhance photoluminescence system inhibiting movement fluorescent centers.