Open AccessProduction of C, N Alternating 2D Materials Using Covalent Modification and Their Electroluminescence Performance
Author(s) -
Park Sunghee,
Kim Young-Hoon,
Kang Sungwoo,
Lim Donggyu,
Park Jinwoo,
Jang Dawoon,
Choi Seungjoo,
Kim Jeongho,
Han Seungwu,
Lee Tae-Woo,
Park Sungjin
Publication year - 2021
Publication title -
small science
Language(s) - English
Resource type - Journals
ISSN - 2688-4046
DOI - 10.1002/smsc.202000042
Subject(s) - electroluminescence , materials science , fabrication , light emitting diode , luminescence , optoelectronics , surface modification , nitride , carbon nitride , diode , photoluminescence , benzene , salt (chemistry) , nanotechnology , photochemistry , chemical engineering , catalysis , organic chemistry , chemistry , photocatalysis , medicine , alternative medicine , pathology , layer (electronics) , engineering
Carbon nitrides (C 3 N 4 ) show excellent properties in various optical and optoelectronic applications. However, their application to electroluminescence (EL) devices is limited by the lack of production methods of homogeneous dispersions in organic solvents, which are critically required for device fabrication. Herein, a strategy to generate stable dispersions of fluorescent, 2D C 3 N 4 materials, and demonstrate light‐emitting diodes (LEDs) based on them is proposed. The treatment of urea‐driven C 3 N 4 (UCN) with methoxy‐benzene diazonium salt (MD) produces dispersions in organic solvents. Experimental and theoretical studies suggest that MD treatment passivates the surface defects of the UCN. The resulting LED devices show bright green luminescence with an external quantum efficiency of 0.91%. This unprecedented result opens an era of C 3 N 4 emitters as future promising light emitters in displays and solid‐state lighting.