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Research Article Open Access

Tuning the emission of Poly (9,9-dioctylflorenyl-2,7-diyl) using one dimensional photonic band gap

Nidhi Gupta1, Rakhi Grover1, Dalip S. Mehta2, Kanchan Saxena1*

1Amity Institute of Advanced Research and Studies (Material & Devices) and Amity Institute of Renewable and Alternative Energy, Amity University, Noida, Uttar Pradesh-201301, India

2Indian Institute of Technology, New Delhi-110016, India

Adv. Mater. Proc., 2017, 2 (3), 194-197

DOI: 10.5185/amp.2017/3012

Publication Date (Web):05 March 2017

Copyright © IAAM-VBRI Press

Abstract


Abstract

Here we present fabrication of one dimensional photonic band gap structure (1D-PBG) based on periodic layers of silver and magnesium fluoride (MgF2) for tuning the emission of polyfluorene derivative, Poly(9,9-dioctylfluorenyl-2,7-diyl) (PFO). Transmittance measurements were used to characterize the photonic band gap. 1D-PBG structure with varying thickness of silver was fabricated on the back side of PFO coated glass substrate. Photoluminescence studies confirmed that blue emission was enhanced while the secondary peaks were suppressed. Photoluminescence spectra shows that the blue to green peak intensity ratio was improved by 1.7 times approximately with PBG. These type of PBG structures can be used to enhance the color purity of PFO based blue organic light emitting diodes. Copyright © 2017 VBRI Press.

Keywords


One dimensional photonic band gap, polyfluorene, organic light emitting diode, colour purity, photoluminescence.