A Study of the Luminescence of Organic-Sensitised Europium Ions in Lanthanum Trifluoride Nanocrystals Towards Optical Amplification

King, Gavin Gordon George

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A Study of the Luminescence of Organic-Sensitised Europium Ions in Lanthanum Trifluoride Nanocrystals Towards Optical Amplification

King, Gavin Gordon George

Cite this item: King, G. G. G. (2013). A Study of the Luminescence of Organic-Sensitised Europium Ions in Lanthanum Trifluoride Nanocrystals Towards Optical Amplification (Thesis, Master of Science). University of Otago. Retrieved from http://hdl.handle.net/10523/4444

Permanent link to OUR Archive version: http://hdl.handle.net/10523/4444

Date: 2013

Advisor: Longdell, Jevon Joseph

Degree Name: Master of Science

Degree Discipline: Physics

Publisher: University of Otago

Keywords: europium; Lanthanum Trifluoride; nanocrystals; amplification; thenoyltrifluroacetone; ligand sensetise; TTA

Research Type: Thesis

Languages: English

Abstract:

The luminescence of europium ions in lanthanum trifluoride nanocrystals are measured, with and without thenoyltrifluroacetate (TTA) sensitisers. It is found that the luminescence from the Eu<sup>3+</sup> is constant in intensity and frequency without TTA; with the TTA the intensity is seen to degrade significantly with exposure to pump light. A number of possibilities for this are explored.

It was intended to include the nanocrystals in polymer films to measure the gain possible; this is explored theoretically. The losses that might be expected using scattering theory are calculated, and using this the gain requirements for nett optical transparency are calculated.

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