Haranath, D. and Sahai, Sonal and Mishra, Savvi and Husain, M. and Shanker, Virendra (2012) Fabrication and electro-optic properties of a MWCNT driven novel electroluminescent lamp. Nanotechnology, 23 (43). pp. 435704-435711. ISSN 0957-4484

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Abstract

We present a novel, cost-effective and facile technique, wherein multi-walled carbon nanotubes (CNTs) were used to transform a photoluminescent material to exhibit stable and efficient electroluminescence (EL) at low voltages. As a case study, a commercially available ZnS:Cu phosphor (P-22G having a quantum yield of 65 +/- 5%) was combined with a very low (similar to 0.01 wt%) concentration of CNTs dispersed in ethanol and its alternating current driven electroluminescence (AC-EL) is demonstrated. The role of CNTs has been understood as a local electric field enhancer and facilitator in the hot carrier injection inside the ZnS crystal to produce EL in the hybrid material. The mechanism of EL is discussed using an internal field emission model, intra-CNT impact excitation and the recombination of electrons and holes through the impurity states.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s IOP Publishing.
Subjects:	Materials Science Applied Physics/Condensed Matter Nanoscience/ Nanotechnology
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	12 Mar 2020 09:38
Last Modified:	12 Mar 2020 09:38
URI:	http://npl.csircentral.net/id/eprint/3571

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