Enhanced fluorescence of photosynthetic pigments through conjugation with carbon quantum dots

Effect of heteroatom‐doped carbon quantum dots on the red emission of metal‐conjugated phthalocyanines through hybridization

“…It should be noted that, recently, the same types of QDs were studied with raw photosynthetic pigments to understand whether these QDs acted as energy donors for raw photosynthetic pigments or not. [ 27 ] Budak and colleagues showed that carbon QDs acted as an efficient energy donor for raw photosynthetic pigments and the presence of heteroatoms in the C‐QD structure disrupted the energy transfer. [ 27 ] The comparison of outcomes of study by Budak and colleagues and that of our current study showed that the mechanisms of energy transfer between QDs and Pcs and the mechanism of energy transfer between QDs and photosynthetic pigments were completely different.…”

“…In this study, boron‐ and nitrogen‐doped carbon QDs were selected as the donor group and metal‐free or zinc (II) phthalocyanines were selected as the acceptor group. The same types of QDs were studied as studied before with photosynthetic pigments, [ 27 ] however our studies showed that energy transfer between carbon/heteroatom‐doped graphene QDs and metal‐free/zinc (II) phthalocyanines was completely different from that of carbon/heteroatom‐doped carbon QDs and photosynthetic pigments. By linking QDs and metal‐free or zinc (II) phthalocyanine structures noncovalently (electrostatic and/or π–π interaction), donor–acceptor light harvesting structures were obtained.…”

“…[ 20–24 ] There have been numerous studies conducted on energy transfer between carbon or graphitic QDs and chlorophyll. [ 25–30 ] The common outcomes of these studies are: (1) carbon (or graphene) QDs serve as a useful energy donor for chlorophyll molecules, [ 27–29 ] or (2) addition of heteroatoms to the QD structure disrupts the energy flow from QDs to chlorophyll molecules. [ 27 ] Even though energy transfer between QDs and chlorophyll molecules has been widely studied for carbon QDs and heteroatom‐doped carbon QDs, no studies have been undertaken on obtaining carbon/graphene QDs doped with boron and nitrogen atoms and phthalocyanine conjugates, to examine their photophysical properties and the energy transfer between these two systems.…”

Spectroscopic investigation of defect-state emission in CdSe quantum dots

“…They are semiconductor materials with fluorescence properties and possess unique photophysical and structural characteristics such as; high quantum yield, high photostability, single narrow emission band, wide absorption bands, high molar extinction coefficient, small size (2 nm -10 nm), semiconductor nature, modifiable surface, etc… [1][2][3][4]. With their unique properties, Cd-Chal QDs have been widely used in many different technologies such as solar cells, LEDs, biotechnology, military, medicine, etc… [5][6][7][8][9][10][11]. Since they have excellent photophysical properties, they are frequently used in LED and solar cell applications [8,9] and even high-tech brands, such as Samsung, have adapted QDs into their monitor systems [12,13].…”

Effect of nitrogen precursor on optical properties of hexagonal Boron Nitride quantum dots

“…These nanomaterials are simply nanometersized blocks of well-known 2D materials such as graphene, graphitic carbon nitride, hexagonal boron nitride, molybdenum sulfide, molybdenum selenide, tungsten sulfide, etc (1)(2)(3)(4). 2D quantum dots have been considered as versatile materials since their discovery and have been used in many different application and research areas such as optoelectronics, supercapacitors, batteries, cell imaging, and sensors (1)(2)(3)(4)(5)(6)(7). Amongst all, BNQDs have been studied widely with their unique features such as low toxicity and high biocompatibility (1)(2)(3)(4).…”