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Journal of Nanoparticle Research

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01-11-2014 | Research Paper

Enhanced polymer light-emitting diode property using fluorescent conducting polymer-reduced graphene oxide nanocomposite as active emissive layer

Authors: Jyoti Prakash Singh, Uttam Saha, Rimpa Jaiswal, Raghubir Singh Anand, Anurag Srivastava, Thako Hari Goswami

Published in: Journal of Nanoparticle Research | Issue 11/2014

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Abstract

The present article reports the polymer light-emitting diode property of the nanocomposite comprising poly 9,9-dioctyl fluorene-alt-bithiophene and reduced graphene oxide used as an emissive layer. Two times repetition of Hummers oxidation and hydrazine hydrate reduction method produce reduced graphene oxide (term as rGO2) with more uniform distribution in size and thickness. In addition, this uniquely synthesized rGO2 induces favorable shift in balance of electron and hole recombination zone toward the center of emissive layer owing to increase in in-plane crystallite size and high localize aromatic confinement. Five times increase in maximum device efficiency (Cd/A) and three times increase in maximum brightness (Cd/m²) are achieved with the LED device using nanocomposite as emissive layer compared to neat polymer. Also, the fabricated device requires relatively low turn-on voltage (4 V) because of low energy barrier between PEDOT work function (−5.0 eV) and HOMO levels of bi-thiophene copolymer −5.67 eV) and nanocomposite (−5.66 eV).

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Title: Enhanced polymer light-emitting diode property using fluorescent conducting polymer-reduced graphene oxide nanocomposite as active emissive layer
Authors: Jyoti Prakash Singh
Uttam Saha
Rimpa Jaiswal
Raghubir Singh Anand
Anurag Srivastava
Thako Hari Goswami
Publication date: 01-11-2014
Publisher: Springer Netherlands
Published in: Journal of Nanoparticle Research / Issue 11/2014
Print ISSN: 1388-0764
Electronic ISSN: 1572-896X
DOI: https://doi.org/10.1007/s11051-014-2693-7

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