Electrostatic Stabilization of Carbon Nitride Colloids in Organic Solvents Enables Stable Dispersions and Transparent Homogeneous CN Films for Optoelectronics

Abstract

Covalent modification of phenyl-modified carbon nitride with vinylthiazole groups via visible light induced grafting is reported. Modified structures express negative charge migration to the thiazole edges while the carbon nitride sheet remains positively charged in organic solutions. Such a phenomenon provides electrostatic stabilization of modified carbon nitride particles in organic media leading to highly organodispersible and colloidally stable carbon nitrides. The resulting structures can be homogeneously dispersed in organic solvents and can be cast to transparent films. The usefulness of such a processable colloidal carbon nitride building block is exemplified here by its high luminescence and inkjet printing of films.

Graphitic carbon nitride and polymers: a mutual combination for advanced properties

“…The two components create an autonomous donor-acceptor type structure and enhance excited electron-hole separation. 83 Moreover, surface functionality has a profound effect on photocatalytic activity as well. (25, 50, and 100 mg mL À1 ) for 24 h at 37 1C (Reprinted with permission.…”

“…Very recently, following our recent discovery of modifying g-C 3 N 4 with 4-methyl-5-vinylthiazole (vTA), in which the grafting of vTA led to spontaneous polarization and migration of negative charges on thiazole rims whereas g-C 3 N 4 remained positive. Thus significantly influencing the electron transport process, 83 which was exploited in another work of our group that applied vTA-grafted g-C 3 N 4 nanosheets (g-C 3 N 4 -vTA) as interfacial transporting layers (ETLs) for inverted perovskite solar cells (PVSCs). 29 Homogenous films of g-C 3 N 4 -vTA were formed via facile spin-coating on two different layers to study the influence of g-C 3 N 4 -vTA on the electronic properties of methylammonium lead iodide based PVSCs.…”

Solution‐Processable Carbon Nitride Polymers for Photoelectrochemical Applications

“…However, the exploitation of CN materials in electronic devices or in imaging‐related applications is still limited by their unsuitability for solution processes, owing to their poor solubility in mild solvents; a result of strong van der Waals interactions between their layers, as it is also observed with other 2D and carbon materials (e.g., graphene, MX 2 , and carbon nanotubes) . Therefore, commonly used techniques for photoelectronic devices and transistor fabrication, such as drop‐casting and spin‐coating, cannot be utilized for the deposition of CN on substrates . To address this, several successful deposition methods have been recently introduced, with good control over the layer properties .…”

“…[7,8] Therefore, commonly used techniques for photoelectronic devices and transistor fabrication, such as drop-casting and spin-coating, cannot be utilized for the deposition of CN on substrates. [9] To address this, several successful deposition methods have been recently introduced, with good control over the layer properties. [10] However, these methods all rely on the in situ growth of CN www.advancedsciencenews.com www.small-methods.com…”

Hot‐Tailoring of Carbon Nitride Dots with Redshifted Photoluminescence for Visual Double Text Encryption and Bioimaging

“…Notably,p ioneering work on the surfacem odification of carbonn itride leadingt oi mproved dispersibility in aqueous and/oro rganic mediah as also been reported, thereby offering as olution. [15] However,t ob roaden the application of CN, exploringn ew top-down ways to fabricate CNDs with redshifted photoluminescence is of fundamentals cientific and technological importance.…”