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Synthesis of 2D Germanane (GeH): a New, Fast, and Facile Approach.

Theodosis GiousisGeorgia PotsiAntonios KouloumpisKonstantinos SpyrouYiannis GeorgantasNikolaos ChalmpesKonstantinos DimosMyrsini-Kiriaki AntoniouGeorgios PapavassiliouAthanasios B BourlinosHae Jin KimVijay Kumar Shankarayya WadiSaeed AlhassanMajid AhmadiBart J KooiGraeme BlakeDaniel M BalazsMaria A LoiDimitrios GournisPetra Rudolf
Published in: Angewandte Chemie (International ed. in English) (2020)
Germanane (GeH), a germanium analogue of graphane, has recently attracted considerable interest because its remarkable combination of properties makes it an extremely suitable candidate to be used as 2D material for field effect devices, photovoltaics, and photocatalysis. Up to now, the synthesis of GeH has been conducted by substituting Ca by H in a β-CaGe2 layered Zintl phase through topochemical deintercalation in aqueous HCl. This reaction is generally slow and takes place over 6 to 14 days. The new and facile protocol presented here allows to synthesize GeH at room temperature in a significantly shorter time (a few minutes), which renders this method highly attractive for technological applications. The GeH produced with this method is highly pure and has a band gap (Eg ) close to 1.4 eV, a lower value than that reported for germanane synthesized using HCl, which is promising for incorporation of GeH in solar cells.
Keyphrases
  • room temperature
  • solar cells
  • ionic liquid
  • reduced graphene oxide
  • highly efficient
  • quantum dots
  • visible light
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  • metal organic framework