Staff View: Efficiency enhancement in blue phosphorescent organic light emitting diode with silver nanoparticles prepared by plasma-assisted hot-filament evaporation as an external light-extraction layer

Efficiency enhancement in blue phosphorescent organic light emitting diode with silver nanoparticles prepared by plasma-assisted hot-filament evaporation as an external light-extraction layer

The uniform growth of silver (Ag) nanoparticles in large areas is important for improving the flat panel devices, mainly organic light emitting diodes (OLED). In this work, two dimensional (2D) arrays of Ag nanoparticles were grown on glass surface substrates via plasma-assisted hot-filament evapora...

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Main Authors:	Al-Masoodi, Abtisam Hasan Hamood, Goh, Boon Tong, Nazarudin, Nur Fatin Farhanah, Sarjidan, Mohd Arif Mohd, Wong, Wah Seng, Abd Majid, Wan Haliza
Format:	Article
Published:	ELSEVIER SCIENCE SA 2020
Subjects:	QC Physics
Online Access:	http://eprints.um.edu.my/36199/
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spelling	my.um.eprints.361992023-12-28T06:23:43Z http://eprints.um.edu.my/36199/ Efficiency enhancement in blue phosphorescent organic light emitting diode with silver nanoparticles prepared by plasma-assisted hot-filament evaporation as an external light-extraction layer Al-Masoodi, Abtisam Hasan Hamood Goh, Boon Tong Nazarudin, Nur Fatin Farhanah Sarjidan, Mohd Arif Mohd Wong, Wah Seng Abd Majid, Wan Haliza QC Physics The uniform growth of silver (Ag) nanoparticles in large areas is important for improving the flat panel devices, mainly organic light emitting diodes (OLED). In this work, two dimensional (2D) arrays of Ag nanoparticles were grown on glass surface substrates via plasma-assisted hot-filament evaporation technique at different plasma environments: no plasma, plasma cleaning (PC), plasma deposition (PD) and PC&PD, which were utilized as an external light-extraction layer for blue phosphorescent OLED device. The surface morphology of the Ag nanoparticles revealed the formation of spherical-like shapes of uniform size which ranged from 7 to 14 nm at different plasma conditions. X-ray diffraction showed that the nanoparticles were mainly single crystals and their crystallinity was significantly enhanced by employing plasma process in PC&PD. The localized surface plasmon resonance peaks of Ag nanoparticles were located at around 380-430 nm which suggests a dependency on diameter and interparticle spacing. The variation of refractive index of Ag nanoparticles 2D array in the visible wavelength from 1.9 to 2.4 plays a key role in high performance OLED. The light-extraction of the OLED device with Ag nanoparticles at PC&PD condition appeared to increase by 82.5% the luminance efficiency compared to that of a reference device without the Ag nanoparticle layer. The effects of the plasma environment on the morphological, structural and optical properties of Ag nanoparticles layer are discussed in the following sections by taking into consideration the effects of glass modification by these Ag nanoparticles on OLED performance. ELSEVIER SCIENCE SA 2020-12 Article PeerReviewed Al-Masoodi, Abtisam Hasan Hamood and Goh, Boon Tong and Nazarudin, Nur Fatin Farhanah and Sarjidan, Mohd Arif Mohd and Wong, Wah Seng and Abd Majid, Wan Haliza (2020) Efficiency enhancement in blue phosphorescent organic light emitting diode with silver nanoparticles prepared by plasma-assisted hot-filament evaporation as an external light-extraction layer. MATERIALS CHEMISTRY AND PHYSICS, 256. ISSN 02540584, DOI https://doi.org/10.1016/j.matchemphys.2020.123618 <https://doi.org/10.1016/j.matchemphys.2020.123618>. 10.1016/j.matchemphys.2020.123618
institution	Universiti Malaya
building	UM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Malaya
content_source	UM Research Repository
url_provider	http://eprints.um.edu.my/
topic	QC Physics
spellingShingle	QC Physics Al-Masoodi, Abtisam Hasan Hamood Goh, Boon Tong Nazarudin, Nur Fatin Farhanah Sarjidan, Mohd Arif Mohd Wong, Wah Seng Abd Majid, Wan Haliza Efficiency enhancement in blue phosphorescent organic light emitting diode with silver nanoparticles prepared by plasma-assisted hot-filament evaporation as an external light-extraction layer
description	The uniform growth of silver (Ag) nanoparticles in large areas is important for improving the flat panel devices, mainly organic light emitting diodes (OLED). In this work, two dimensional (2D) arrays of Ag nanoparticles were grown on glass surface substrates via plasma-assisted hot-filament evaporation technique at different plasma environments: no plasma, plasma cleaning (PC), plasma deposition (PD) and PC&PD, which were utilized as an external light-extraction layer for blue phosphorescent OLED device. The surface morphology of the Ag nanoparticles revealed the formation of spherical-like shapes of uniform size which ranged from 7 to 14 nm at different plasma conditions. X-ray diffraction showed that the nanoparticles were mainly single crystals and their crystallinity was significantly enhanced by employing plasma process in PC&PD. The localized surface plasmon resonance peaks of Ag nanoparticles were located at around 380-430 nm which suggests a dependency on diameter and interparticle spacing. The variation of refractive index of Ag nanoparticles 2D array in the visible wavelength from 1.9 to 2.4 plays a key role in high performance OLED. The light-extraction of the OLED device with Ag nanoparticles at PC&PD condition appeared to increase by 82.5% the luminance efficiency compared to that of a reference device without the Ag nanoparticle layer. The effects of the plasma environment on the morphological, structural and optical properties of Ag nanoparticles layer are discussed in the following sections by taking into consideration the effects of glass modification by these Ag nanoparticles on OLED performance.
format	Article
author	Al-Masoodi, Abtisam Hasan Hamood Goh, Boon Tong Nazarudin, Nur Fatin Farhanah Sarjidan, Mohd Arif Mohd Wong, Wah Seng Abd Majid, Wan Haliza
author_facet	Al-Masoodi, Abtisam Hasan Hamood Goh, Boon Tong Nazarudin, Nur Fatin Farhanah Sarjidan, Mohd Arif Mohd Wong, Wah Seng Abd Majid, Wan Haliza
author_sort	Al-Masoodi, Abtisam Hasan Hamood
title	Efficiency enhancement in blue phosphorescent organic light emitting diode with silver nanoparticles prepared by plasma-assisted hot-filament evaporation as an external light-extraction layer
title_short	Efficiency enhancement in blue phosphorescent organic light emitting diode with silver nanoparticles prepared by plasma-assisted hot-filament evaporation as an external light-extraction layer
title_full	Efficiency enhancement in blue phosphorescent organic light emitting diode with silver nanoparticles prepared by plasma-assisted hot-filament evaporation as an external light-extraction layer
title_fullStr	Efficiency enhancement in blue phosphorescent organic light emitting diode with silver nanoparticles prepared by plasma-assisted hot-filament evaporation as an external light-extraction layer
title_full_unstemmed	Efficiency enhancement in blue phosphorescent organic light emitting diode with silver nanoparticles prepared by plasma-assisted hot-filament evaporation as an external light-extraction layer
title_sort	efficiency enhancement in blue phosphorescent organic light emitting diode with silver nanoparticles prepared by plasma-assisted hot-filament evaporation as an external light-extraction layer
publisher	ELSEVIER SCIENCE SA
publishDate	2020
url	http://eprints.um.edu.my/36199/
_version_	1787133813410758656
score	13.211869

Efficiency enhancement in blue phosphorescent organic light emitting diode with silver nanoparticles prepared by plasma-assisted hot-filament evaporation as an external light-extraction layer

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