Prospects for obtaining an efficient organolanthanide-based infra-red light emitting diode
Prospects for obtaining an efficient organolanthanide-based infra-red light emitting diode
The rapid development of polymer and molecular-based light emitting diodes has resulted in a new generation of low cost displays currently entering the market place. The use of organolanthanide molecules as emitting centres in these devices was first suggested as a means of improving the colour purity of the emission utilising the sharp 4f-4f transitions of the lanthanide ion. The energy transfer process involved in exciting the lanthanide ion however also increased the theoretical quantum efficiency from 25%, typical for a conventional device, to 100% due to the large spin-orbit coupling induced by the heavy ion. Despite this advantage the highest reported efficiency to date is 1.4%. More recently infra-red emitting organolanthanide based diodes have been demonstrated though again reported efficiencies are low. In this paper the prospects of producing an efficient organolanthanide-based light emitting diode are discussed with an emphasis on those emitting in the infra-red.
Curry, R.J.
a426dc90-9f99-47ef-93a5-21787c20e0a0
2002
Curry, R.J.
a426dc90-9f99-47ef-93a5-21787c20e0a0
Curry, R.J.
(2002)
Prospects for obtaining an efficient organolanthanide-based infra-red light emitting diode.
Photonics Conference 2002, Korea.
30 Oct - 01 Nov 2002.
Record type:
Conference or Workshop Item
(Other)
Abstract
The rapid development of polymer and molecular-based light emitting diodes has resulted in a new generation of low cost displays currently entering the market place. The use of organolanthanide molecules as emitting centres in these devices was first suggested as a means of improving the colour purity of the emission utilising the sharp 4f-4f transitions of the lanthanide ion. The energy transfer process involved in exciting the lanthanide ion however also increased the theoretical quantum efficiency from 25%, typical for a conventional device, to 100% due to the large spin-orbit coupling induced by the heavy ion. Despite this advantage the highest reported efficiency to date is 1.4%. More recently infra-red emitting organolanthanide based diodes have been demonstrated though again reported efficiencies are low. In this paper the prospects of producing an efficient organolanthanide-based light emitting diode are discussed with an emphasis on those emitting in the infra-red.
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Published date: 2002
Venue - Dates:
Photonics Conference 2002, Korea, 2002-10-30 - 2002-11-01
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Local EPrints ID: 17011
URI: http://eprints.soton.ac.uk/id/eprint/17011
PURE UUID: b6125a47-0403-4a6d-bf0f-66d4a0980138
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Date deposited: 05 Sep 2005
Last modified: 15 Mar 2024 05:51
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Author:
R.J. Curry
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