Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 60, Issue 1, Pages 360-365Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202010404
Keywords
germanane; semiconductors; synthesis; topotatic de-intercalation; two-dimensional materials
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Funding
- Top Research School programme of the Zernike Institute for Advanced Materials under the Bonus Incentive Scheme (BIS) of the Netherlands' Ministry of Education, Science, and Culture
- Action Reinforcement of the Research and Innovation Infrastructure - Operational Programme Competitiveness, Entrepreneurship and Innovation (NSRF 2014-2020) [MIS 5002772]
- European Union (European Regional Development Fund)
- IKY Foundation
- European Union (European Social Fund-ESF) through the Operational Programme Human Resources Development, Education and Lifelong Learning [MIS-5000432]
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Germanane (GeH), a germanium analogue of graphane, is a highly suitable candidate for field effect devices, photovoltaics, and photocatalysis as a 2D material due to its unique properties. A new, efficient synthesis method allows for the production of pure GeH at room temperature in a short amount of time, with a band gap value promising for solar cell applications.
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 beta-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 (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.
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