Synthesis of isoniazid substituted pyrene (PINHy), and investigation of its optical and electrochemical features as tunable/flexible OLEDs

• Published in: Journal of materials science. Materials in electronics Vol. 28; no. 17; pp. 13094 - 13100
• Main Authors: Sayin, Serkan, Varol, Songül Fiat, Merdan, Ziya, Eymur, Serkan
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.09.2017; Springer Nature B.V
• Subjects: Brightness; Characterization and Evaluation of Materials; Chemical synthesis; Chemistry and Materials Science; Electrochemical analysis; Electroluminescence; Electron transfer; Light emitting diodes; Materials Science; NMR; Nuclear magnetic resonance; Optical and Electronic Materials; Optical properties; Organic light emitting diodes; Pyrene; Organic Light Emit Diode; Isoniazid; External Quantum Efficiency; Bilayer System
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-017-7142-9

A new pyrene derivative substituted with isoniazid was synthesized via a simple Schiff base formation reaction, and its structure was characterized by using 1 H-NMR, 13 C-NMR, APT-NMR and elemental analysis techniques. Isoniazid-substituted pyrene ( PINHy ) was used as an emitting layer (EML) in the fabrication of new organic light-emitting diodes (OLEDs) consisted of bilayer or quaternary-layer system. We only used a hole transfer layer (HTL) and EML for the construction of the OLED device with bilayer system, while the OLED device with quaternary-layer system contained a combination of hole injection layer, HTL, EML and electron transfer layer. The optical and electrochemical properties of these materials were also examined. The results indicated that the OLED devices with quaternary-layer and bilayer system using isoniazid-substituted pyrene ( PINHy ) as EML showed efficient electroluminescent properties with the brightness of 906 and 864 cd/m 2 at 11 V, the power efficiencies of 2.8 and 2.47 Im/W, and the external quantum efficiencies of 7.3 and 8.1% at 6.0 V, respectively.