Gupta, Bipin Kumar and Singh, Satbir and Kedawat, Garima and -, Kanika and Kumar, Pawan and Gangwar, Amit Kumar and Narayanan, Tharangattu N. and Marti, Angel A. and Vajtai, Robert and Ajayane, P. M. (2017) A novel electroluminescent device based on a reduced graphene oxide wrapped phosphor (ZnS:Cu,Al) and hexagonal-boron nitride for high-performance luminescence. Nanoscale, 9 (15). pp. 5002-5008. ISSN 2040-3364

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Abstract

Reduced graphene oxide (rGO) has recently emerged as a very promising family of exotic carbon material with augmented performance in electronic and optoelectronic devices. Herein, we report an efficient and novel inorganic electroluminescent device geometry, where a new phosphor composite, reduced graphene oxide wrapped ZnS:Cu, Al, acts as an active emitting layer and an exfoliated hexagonal boron nitride (h-BN) as a dielectric layer. The roles of rGO in the active layer as a conductive support and local electric field enhancing agent are attributed to its wrinkles being unraveled compared with other carbon exotic nano-forms such as carbon nanotubes, graphite, charcoal and activated carbon, which significantly improves the brightness of the device (similar to 50 cd m (2) for 0.50 wt% rGO/ZnS: Cu, Al at 10 kHz and 110 V with an external quantum efficiency of similar to 6.3% +/- 0.1% and current efficiency of similar to 0.81 +/- 0.09 cd A(-1)). This new and facile strategy to construct the luminescent devices could be a paradigm shift towards cost effective, highly stable in air (for several days) and energy efficient next generation display devices.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Royal Society of Chemistry.
Subjects:	Chemistry Materials Science Applied Physics/Condensed Matter Nanoscience/ Nanotechnology
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	16 Aug 2018 08:58
Last Modified:	16 Aug 2018 08:58
URI:	http://npl.csircentral.net/id/eprint/2610

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