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Synthesis of 2D Germanane (GeH): a New, Fast, and Facile Approach
Author(s) -
Giousis Theodosis,
Potsi Georgia,
Kouloumpis Antonios,
Spyrou Konstantinos,
Georgantas Yiannis,
Chalmpes Nikolaos,
Dimos Konstantinos,
Antoniou MyrsiniKiriaki,
Papavassiliou Georgios,
Bourlinos Athanasios B.,
Kim Hae Jin,
Wadi Vijay Kumar Shankarayya,
Alhassan Saeed,
Ahmadi Majid,
Kooi Bart J.,
Blake Graeme,
Balazs Daniel M.,
Loi Maria A.,
Gournis Dimitrios,
Rudolf Petra
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202010404
Subject(s) - graphane , photovoltaics , materials science , band gap , germanium , photocatalysis , nanotechnology , chemical engineering , graphene , chemistry , catalysis , optoelectronics , silicon , photovoltaic system , organic chemistry , ecology , engineering , biology
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‐CaGe 2 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 ( E g ) 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.