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Design, Synthesis and Characterization of N‐Substituted Heteroaromatics: DFT‐Studies and Organic Light Emitting Device Application
Author(s) -
Mohan Makesh,
John Raganjali,
Nagarajan Satyanarayan M.,
Trivedi Darshak R.
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201903409
Subject(s) - common emitter , fluorene , carbazole , oled , homo/lumo , fluorescence , materials science , quantum yield , brightness , photochemistry , schiff base , analytical chemistry (journal) , optoelectronics , chemistry , nanotechnology , polymer chemistry , optics , organic chemistry , molecule , physics , polymer , layer (electronics) , composite material
Abstract Schiff's base condensation of 4,5‐Dimethyl‐1,2‐phenylenediamine with various aldehydes namely fluorene‐2‐carboxaldehyde (MBF) , N‐ethyl‐3‐carboxaldehyde (MBE) , 8‐hydroxyjulolidine‐9‐carboxaldehyde (MBJ) and N‐(4‐formylphenyl) carbazole (MBB) functioning as light emitters have been synthesized. Solid‐state emission reveals the exhibition of variant fluorescent color achieved by mere variation in the peripheral group attached to the core. Amongst the designed system, MBB showed a solid‐state blue light emission with its emission peak centered at 453 nm. The fluorescence quantum yield of MBB displayed value of 44.82% in the solution state. Electrochemical studies on MBB estimated a HOMO energy level at −5.7 eV and LUMO at −3.2 eV. OLED realized with MBB as an active emitter material was successful in the generation of bluish‐green emission with a maximum brightness of 280 cd/m 2 . Current efficiency of 2 cd/A and a power efficiency of 0.18 lm/W was observed for the fabricated device.