N-doped carbon quantum dots for TiO2-based photocatalysts and dye-sensitized solar cells

Hydroxyapatite/N-doped carbon dots/Ag3PO4 composite for improved visible-light photocatalytic performance

“…[18][19][20] Meanwhile, it has been demonstrated that introducing CDs into semiconductors could remarkably enhance the photocatalytic activities of the composites. [21][22][23][24][25] The tunable photocatalytic properties of CDs have also been widely investigated in our research group.…”

Fluorescently tuned nitrogen-doped carbon dots from carbon source with different content of carboxyl groups

“…Carbon dots (CDs), having unique optical property, high aqueous solubility, excellent biocompatibility, low toxicity, and robust chemical inertness, [1][2][3][4][5] have been widely studied and applied in various fields including bio-imaging, 6 catalysis, 7,8 light-emitting diodes, 9,10 sensors, 6,11 as well as solar cells. [12][13][14] Since CDs were discovered by Xu et al in 2004, 15 tremendous research efforts have focused on developing synthetic approaches which can be classified as "up-down" and "bottom-up" methods. The former usually refers to producing CDs by cutting the carbon sources, such as graphene sheets, carbon nanotubes, carbon fibers, etc., through the methods of laser ablation, chemical-, electrochemical-oxidation, and hydrothermal treatment.…”

“…[20][21][22] Recently, CDs doping with hetero-atoms, particularly nitrogen-doped CDs (NCDs), have been actively pursued. 8,12,23 In spite of the controversial mechanism of CDs' photoluminescence (PL), it is widely accepted that surface groups can introduce trap states with different energy levels, which leads to the excitation-dependent emission. 22,24 The origin of NCDs' tunable fluorescence has been investigated by adjusting surface states, [25][26][27] and diverse fluorescence phenomena have been observed for NCDs prepared by various reactant precursors.…”

One-step and green synthesis of nitrogen-doped carbon quantum dots for multifunctional electronics

“…[21][22][23] Recently, doped and undoped CQDs also show promising applications in the next generation of organic electronic and optoelectronic devices, such as solar cells for energy conversion, light-emitting devices for display and lighting, memories for data storage, and photodetectors for information collection. [24][25][26][27] However, most of the CQDs-based organic electronics focus on the actualization of single function in a single device, but there has been a lack of breakthroughs in the multifunctional electronic devices. Therefore, how to realize CQDs-based multifunctional devices is extremely important.…”