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ARTICLE

Tunable Light Emission from P-Acetylbiphenyl-Cl-DPQ Organic Phosphor: For Blue and Near UV-OLED Applications

by Suyash Y. Mullemwar, Gajanan D. Zade, N. Thejo Kalyani, Sanjay J. Dhoble

a Department of Physics, RTM, Nagpur University, Nagpur-440033, India
b J.N. Art’s, Commerce and Science College, Wadi, Nagpur-440033, India
c Department of Applied Physics, Laxminarayan Institute of Technology, Nagpur-440033, India

* Corresponding Author:* Correspondence Author, E-mail:

Journal of Advanced Optics and Photonics 2018, 1(2), 109-124. https://doi.org/10.32604/jaop.2018.02535

Issue published 22 April 2021

Abstract

A novel 2-([1, 1’-biphenyl]-4-yl)-6-chloro-4-phenylquinoline (P-Acetylbiphenyl-Cl-DPQ) phosphor was synthesized by Friedlander condensation reaction at 1400C. To check its suitability for fabricating near UV – organic light emitting diodes (UV-OLEDs) by vacuum vapor deposition, the synthesized organic phosphor is assessed by various characterization techniques such as Fourier Transform Infrared (FTIR) spectroscopy, H-NMR, C-NMR, Thermo gravimetric/ Differential Thermal Analysis (TGA/DTA), optical absorption spectra and photoluminescence (PL) spectra in solid state. The synthesized phosphor is molecularly doped in Polystyrene matrix different wt% to explore its compatibility with polymers. FTIR and NMR confirm the structural formation of the desired complex. TGA and DTA reveal appreciable thermal stability and melting point. Absorption spectra were employed to study optical transitions in the synthesized phosphor at 10-3 M concentration in various organic solvents. The energy band gap of the synthesized organic phosphor was found to be 3.37, 3.40, 3.02, and 3.03 eV in chloroform, dichloromethane, acetic acid and formic acid, respectively. PL spectra of the phosphor in solid state, various organic solvents and in polystyrene reveal emission in the range of 383-495 nm, under excitation wavelength ranging between 360-419 nm. Stokes shift of about 63-66 nm was observed. CIE coordinates reflect that the synthesized organic phosphor can be used as a tunable emissive material in the range of blue to near UV emission in the fabrication of blue and near UV -OLEDs.

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