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Polygermyne: Germanium sheet polymers with efficient near-infrared luminescence

Published online by Cambridge University Press:  21 March 2011

Günther Vogg ,
Martin S. Brandt ,
Lex J.-P. Meyer ,
Martin Stutzmann ,
Zoltán Hajnal ,
Bernadett Szücs  and
Thomas Rauenheim
Günther Vogg
Affiliation:
Walter Schottky Institut, Technische Universität München, Am Coulombwall, D-85748 Garching, Germany
Martin S. Brandt
Affiliation:
Walter Schottky Institut, Technische Universität München, Am Coulombwall, D-85748 Garching, Germany
Lex J.-P. Meyer
Affiliation:
Walter Schottky Institut, Technische Universität München, Am Coulombwall, D-85748 Garching, Germany
Martin Stutzmann
Affiliation:
Walter Schottky Institut, Technische Universität München, Am Coulombwall, D-85748 Garching, Germany
Zoltán Hajnal
Affiliation:
Theoretische Physik, Universität Paderborn, Warburger Str. 100, D-33095 Paderborn, Germany
Bernadett Szücs
Affiliation:
Theoretische Physik, Universität Paderborn, Warburger Str. 100, D-33095 Paderborn, Germany
Thomas Rauenheim
Affiliation:
Theoretische Physik, Universität Paderborn, Warburger Str. 100, D-33095 Paderborn, Germany
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Abstract

The structural, optical and electronic properties of the Ge sheet polymer poylgermyne are summarized. Prepared via topotactic transformation of Zintl-phase CaGe2, (GeH)n forms a layered crystal in a tr6 stacking sequence with a distance of 5.65 Å between adjacent layers. The photoluminescence at 1.3 eV is excited nearly resonantly with a Stokes shift of 0.2 eV. Together with band structure calculations this shows that polygermyne has a direct band gap.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 667: Symposium G – Luminescence and Luminescent Materials , 2001 , G3.13
Copyright
Copyright © Materials Research Society 2001

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References

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