Unconventional energy transfer from narrow to broad luminescent wide band gap materials

Shinde, Satish Laxman and Dao, Thang Duy and Nagao, Tadaaki and Nanda, Karuna Kar (2019) Unconventional energy transfer from narrow to broad luminescent wide band gap materials. In: EPL, 127 (1).

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Abstract

Here, we demonstrate an unconventional energy transfer with narrow band gap CdTe/PbS quantum dots as donors and broad luminescent wide-band-gap oxide materials as acceptors. As a result, the luminescence of wide band gap materials increases and the enhancement factor follows a linear process for photon conversion as in the case of Forster resonance energy transfer. In addition, the strong anti-reflection effect enabling efficient light harvesting, broad spectral overlapping and strong coupling between quantum dots and oxides are the key processes for the unconventional energy transfer. An enhancement of around similar to 5500% is observed for GeO2/PbS quantum dots which is higher than that reported for the conventional energy transfer process. The findings demonstrate unconventional energy transfer which enables a greater understanding and rational engineering of light harvesting devices and quantum light sources.

Item Type:	Journal Article
Publication:	EPL
Publisher:	IOP PUBLISHING LTD
Additional Information:	copyright for this article belongs to IOP PUBLISHING LTD
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	13 Sep 2019 07:37
Last Modified:	13 Sep 2019 07:37
URI:	http://eprints.iisc.ac.in/id/eprint/63536

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