Nitrogen‐Dopant‐Induced Organic–Inorganic Hybrid Perovskite Crystal Growth on Carbon Nanotubes. (27th May 2019)

• Record Type: Journal Article
• Authors: Lee, Gil Yong; Yang, Moon Young; Kim, Dong‐Ha; Lim, Joonwon; Byun, Jinwoo; Choi, Dong Sung; Lee, Ho Jin; Nam, Yoon Sung; Kim, Il‐Doo; Kim, Sang Ouk
• Is Part Of: Advanced functional materials. Volume 29:Number 30(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-05-27
• Subjects: carbon nanotube -- methylammonium lead iodide -- nitrogen doping -- NO2 gas sensor -- organic–inorganic halide perovskite; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.201902489
• Languages: English
• ISSNs: 1616-301X

Abstract

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 (CH3 NH3 PbI3, MAPbI3 ) at nitrogen‐doped carbon nanotube (NCNT) surfaces for the self‐assembly of MAPbI3 /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 MAPbI3 /NCNT hybrids is presented for highly sensitive and selective NO2 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. Abstract : The specific nucleation site and interfacial interaction between methylammonium lead iodide perovskite (CH3 NH3 PbI3, MAPbI3 ) and nitrogen‐doped carbon nanotube (NCNT) are demonstrated by experimental and theoretical analysis. The methylammonium ion is modified by sharing a proton with a pyridinic N‐dopant site for interfacial interaction. The MAPbI3 /NCNT hybrids exhibit sensitive and selective NO2 sensing activities.