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Proceedings Paper

Electroluminescent devices using a layered organic-inorganic perovskite structure as emitter
Author(s): Michael Coelle; Wolfgang Bruetting; Markus Schwoerer; Masayuki Yahiro; Tetsuo Tsutsui
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Paper Abstract

Self-organizing layered perovskite compounds like (formula available in paper) naturally form a dielectric quantum-well structure in which semiconducting PbI4 layers and organic (C6H5C2H4NH3) layers are alternately piled up. Due to their low- dimensional semiconductor nature they exhibit a strong absorption and sharp photoluminescence from the exciton band. In electroluminescent devices pure green emission peaking at 520 nm with a very narrow half-width of about 10 nm has been reported. As the organic-inorganic layered structure has promising properties for EL-devices, we investigated two- and three layer structures using this perovskite as emitter material in combination with additional hole and electron injection layers. To get more insight into electrical properties and electroluminescence- mechanisms of this material, temperature dependent current- voltage-luminance characteristics have been measured, showing an increasing onset-voltage for current flow from 2.6 V at room temperature to about 8.8 V at 80 K. Electroluminescence is detected at temperatures below 150 K with onset voltages of about 13 V. At liquid nitrogen temperature efficiencies of (formula available in paper) are obtained.

Paper Details

Date Published: 2 February 2001
PDF: 10 pages
Proc. SPIE 4105, Organic Light-Emitting Materials and Devices IV, (2 February 2001); doi: 10.1117/12.416912
Show Author Affiliations
Michael Coelle, Univ. Bayreuth (Germany)
Wolfgang Bruetting, Univ. Bayreuth (Germany)
Markus Schwoerer, Univ. Bayreuth (Germany)
Masayuki Yahiro, Kyushu Univ. (Japan)
Tetsuo Tsutsui, Kyushu Univ. (Japan)

Published in SPIE Proceedings Vol. 4105:
Organic Light-Emitting Materials and Devices IV
Zakya H. Kafafi, Editor(s)

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