Narrow‐bandwidth emissive carbon dots: A rising star in the fluorescent material family

Abstract

Fluorescent carbon dots (CDs) have recently become a research hotspot in multidisciplinary fields owing to their distinctive advantages, including outstanding photoluminescence properties, high biocompatibility, low toxicity, and abundant raw materials. Among the promising CDs, narrow‐bandwidth emissive CDs with high color purity have emerged as a rising star in recent years because of their significant potential applications in bioimaging, information sensing, and photoelectric displays. In this review, the state‐of‐the‐art advances of narrow‐bandwidth emissive CDs are systematically summarized, and the factors influencing the emission bandwidth, preparation methods, and applications of narrow‐bandwidth emissive CDs are described in detail. Besides, existing challenges and future perspectives for achieving high‐performance narrow‐bandwidth emissive CDs are also discussed. This overview paper is expected to generate more interest and promote the rapid development of this significant research area.

Cu substitution boosts self-trapped exciton emission in zinc-based metal halides for sky-blue light-emitting diodes

“…Metal halide perovskites are promising for next-generation display and lighting applications due to their high photoluminescence quantum yield (PLQY), tunable emission wavelength and low cost, and excellent optoelectronic performance. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] Only five years after the first demonstration of room-temperature electroluminescence (EL) from perovskite light-emitting diodes (PeLEDs), lead-based PeLEDs have already achieved an impressive set of achievements, 17 with the highest external quantum efficiency (EQE) of both green and red light-emitting perovskite diodes exceeding 24% to date. 18,19 However, the development of blue LEDs as a key optoelectronic component is lagging far behind that of green and red LEDs.…”

A robust, stretchable, transparent, solvent‐resistant, and fluorescent composite: Anchoring carbon dots in polyurethane to obtain new photoluminescent emissions

“…As a kind of intriguing carbon nanomaterials, CDs have been drawing more and more attention from the scientific community in recent years 4–6 . And due to their distinctive merits such as tunable photoluminescence, high biocompatibility, low toxicity, photostability, chemical inertness, and low cost, 7–9 CDs are being employed in so many fields, for instance, biomedical applications, 10 ion detection, 11 information encryption, 12 electrocatalysis, 13 photocatalysis, 14 and optoelectronic devices 15 …”

Cation–π aggregation-induced white emission of moisture-resistant carbon quantum dots: a comprehensive spectroscopic study

“…7 Moreover, CQDs also present attractive chemical features like biocompatibility and low cytotoxicity, 8 which makes them desirable for various biological applications in biosensing 9 and drug delivery. 4 Furthermore, CQDs can also be considered the main players in the designing and engineering 10,11 of optical and optoelectronic devices. 12…”

“…7 Moreover, CQDs also present attractive chemical features like biocompatibility and low cytotoxicity, 8 which makes them desirable for various biological applications in biosensing 9 and drug delivery. 4 Furthermore, CQDs can also be considered the main players in the designing and engineering 10,11 of optical and optoelectronic devices. 12 Since different functional groups can manipulate the motion of the free electrons in the structure, the type of the dominant functional groups around CQDs determines the photonic properties of CQDs.…”