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Proceedings Paper

Continuous and discontinuous growth of single crystalline light-emitting films on mica
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Paper Abstract

In this work we investigate with the help of low energy electron scattering, force microscopy and optical spectroscopy the growth of ultrathin p-nP (n=4,5,6) films on mica surfaces. We find conditions under which we obtain on a nanometric scale spatially localized emission and conditions under which the emission is spatially non-localized. The latter case results from continuous films of upright molecules (i.e. with transition dipole moments oriented parallel to the surface normal) whereas the former case is obtained if - under certain growth conditions - films consisting of high-aspect ratio 'needles' of laying molecules with well-oriented transition dipole moments along the surface have been grown. Because of a strong interaction between substrate surface dipoles and induced dipoles along the long molecular axes, the needles form macroscopic domains of almost perfectly mutually parallel aligned entities. The quality of the alignment depends on the length of the molecules.

Paper Details

Date Published: 4 November 2002
PDF: 7 pages
Proc. SPIE 4809, Nanoscale Optics and Applications, (4 November 2002); doi: 10.1117/12.451660
Show Author Affiliations
Frank Balzer, Humboldt-Univ. zu Berlin (Germany)
Horst-Guenter Rubahn, Odense Univ. (Denmark)

Published in SPIE Proceedings Vol. 4809:
Nanoscale Optics and Applications
Guozhong Cao; Wiley P. Kirk, Editor(s)

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