Journal
APPLIED PHYSICS LETTERS
Volume 115, Issue 5, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.5111011
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Funding
- European Research Council (ERC) [756225]
- Agence Nationale de la Recherche through grant Nanodose
- French state funds [ANR-11-IDEX-0004-02]
- Region Ile-de-France
- Air Force Office of Scientific Research Young Investigator Program [FA9550-17-1-0170]
- National Science Foundation Early Career Development (CAREER) Award [1847370]
- Herbert L. Stiles Faculty Fellowship
- National Science Foundation Graduate Research Fellowship [1744592]
- Agence Nationale de la Recherche through grant IPER-nano2
- Division Of Graduate Education
- Direct For Education and Human Resources [1744592] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1847370] Funding Source: National Science Foundation
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Germanane is a two-dimensional, strongly confined form of germanium. It presents an interesting combination of (i) ease of integration with CMOS technology, (ii) low toxicity, and (iii) electronic confinement which transforms the indirect bandgap of the bulk material into a direct bandgap featuring photoluminescence. However, the optoelectronic properties of this material remain far less investigated than its structural properties. Here, we investigate the photoluminescence and transport properties of arrays of methyl-terminated germanane flakes. The photoluminescence appears to have two contributions, one from the band edge and the other from trap states. The dynamics of the exciton appear to be in the range of 1-100ns. Conduction in this material appears to be p-type, while the photoconduction time response can be made as short as 100 mu s.
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