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Polygermyne: Germanium sheet polymers with efficient near-infrared luminescence

  • Günther Vogg (a1), Martin S. Brandt (a1), Lex J.-P. Meyer (a1), Martin Stutzmann (a1), Zoltán Hajnal (a2), Bernadett Szücs (a2) and Thomas Rauenheim (a2)...

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.

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Polygermyne: Germanium sheet polymers with efficient near-infrared luminescence

  • Günther Vogg (a1), Martin S. Brandt (a1), Lex J.-P. Meyer (a1), Martin Stutzmann (a1), Zoltán Hajnal (a2), Bernadett Szücs (a2) and Thomas Rauenheim (a2)...

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