Nitrogen‐Dopant‐Induced Organic–Inorganic Hybrid Perovskite Crystal Growth on Carbon Nanotubes

Abstract

Interfacial engineering of organic-inorganic halide perovskites in conjunction with different functional materials is anticipated to offer novel heterojunction structures with unique functionalities. Unfortunately, complex material compositions and structures of the organic-inorganic hybrid materials make it difficult to tailor a desirable intermolecular interaction at the interface. Spontaneous and highly specific nucleation of perovskite crystals, that is, methylammonium lead iodide perovskite (CH 3 NH 3 PbI 3 , MAPbI 3 ) at nitrogendoped carbon nanotube (NCNT) surfaces for the self-assembly of MAPbI 3 / NCNT hybrids is reported. It is demonstrated that the lone-pair electrons of pyridinic nitrogen-dopant sites at NCNTs mediate specific interactions with the cationic component in the perovskite structure and serve as the nucleation sites via coordinate bonding formation, as supported by X-ray photoelectron spectroscopy and density functional theory calculation. The potential suitability of MAPbI 3 /NCNT hybrids is presented for highly sensitive and selective NO 2 sensing layer. This work suggests a reliable self-assembly route to the molecular level hybridization of organic-inorganic halide perovskites by employing the substitutional dopant sites at graphene-based nanomaterials.

Silk Sericin As a Green Adhesive to Fabricate a Textile Strain Sensor with Excellent Electromagnetic Shielding Performance

“…For manufacture of conductive textiles, a thin layer of conductive materials, such as metallic particles, carbon-based materials, , and conductive polymers, is typically coated on textiles. Among them, carbon nanotubes (CNTs) with the merits of large surface areas, high conductivity, mechanical flexibility, and high stability, are desirable potential applications for various sensors. − However, CNTs tend to agglomerate easily in a liquid phase, especially in water, because of strong π–π interactions among each other, which is not conducive to uniform distribution of CNTs on textiles. Or else CNTs are mixed with an elastomeric binder, which inevitably affects the surface performance of CNTs, and to enable electrical conductivity, the weight fractions of CNTs are abundant .…”

Monodisperse Carbon Nitride Nanosheets as Multifunctional Additives for Efficient and Durable Perovskite Solar Cells

“…Metal halide perovskites have emerged as promising materials for solar cells, − light-emitting diodes, − transistors, and sensors . Noticeably, metal halide perovskite solar cells (PSCs) have achieved rapid, unprecedented advances in the power conversion efficiencies (PCEs) approaching 25.5% .…”

“…Metal halide perovskites have emerged as promising materials for solar cells, 1−3 light-emitting diodes, 4−6 transistors, 7 and sensors. 8 Noticeably, metal halide perovskite solar cells (PSCs) have achieved rapid, unprecedented advances in the power conversion efficiencies (PCEs) approaching 25.5%. 9 Unfortunately, typical solution processing of perovskite relying on the relatively weak and vulnerable interelemental binding yields a high density of crystal defects, such as undercoordinated ions or halide vacancy sites.…”

Sensing Mechanism of H2O, NH3, and O2 on the Stability-Improved Cs2Pb(SCN)2Br2 Surface: A Quantum Dynamics Investigation

“…Our previous work , shows that the structural instability of the perovskite materials causes different dynamic changes around the adsorption sites. Such a property challenges the traditional static first-principles calculations; − therefore, the quantum dynamics methodology is employed to deal with such special properties. ,,− …”