Optical performance of efficient blue/near UV nitropyridine-conjugated anthracene (NAMA) based light emitting diode

Varol S. F., SAYIN S., Eymur S., MERDAN Z., Unal D.

ORGANIC ELECTRONICS, vol.31, pp.25-30, 2016 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 31
  • Publication Date: 2016
  • Doi Number: 10.1016/j.orgel.2016.01.006
  • Journal Name: ORGANIC ELECTRONICS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.25-30
  • Keywords: Nitropyridine-conjugated anthracene, Blue/near UV emission, Organic light emitting diode (OLED), Luminescence, ORGANIC ELECTROLUMINESCENT DEVICES, HIGHLY EFFICIENT, CHARGE-TRANSPORT, BLUE EMITTERS, HEAVY-ATOM, DERIVATIVES, FLUORESCENCE, POLYMER, MOLECULES, PLANARITY
  • Gazi University Affiliated: Yes

Abstract

9-[(5-nitropyridin-2-aminoethyl) iminiomethyl]-anthracene (NAMA) was synthesized for the first time from the reaction between 9-antracene carboxaldehyde and 2-(2-aminoethylamino)-5-nitropyridine under mild reaction conditions. The structure of the nitropyridine-conjugated anthracene (NAMA) was characterized using H-1-NMR, C-13-NMR and elemental analysis techniques. Furthermore, electroluminescent behavior of the NAMA was investigated by using a material based on polycyclic aromatic hydrocarbons (PAHs) in organic light-emitting diodes (OLEDs). It was observed that the NAMA exhibits blue/near UV emission at 410 nm with a high density signal. The optimized device structure, ITO/CuPc/alpha-NPD/NAMA/Alq3/LiF/Al is characterized by blue/near UV electroluminescence (EL) and a high current density with 7735 cd m(-2) maximum brightness at approximately 10.4 V. The emitting color of the device showed the blue/near UV emission (x, y) = (0.14, 0.10) at 277.1 mA cm(-2) in CIE (Commission Internationale de l'Eclairage) chromaticity coordinates with a long operational lifetime (180 h). (c) 2016 Elsevier B.V. All rights reserved.