Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 3, Pages 1074-1080Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201912761
Keywords
2D materials; phosphorus allotrope; semiconductor; violet phosphorene; violet phosphorus
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Funding
- National Natural Science Foundation of China [21771143]
- Cyrus Tang Foundation through Tang Scholar Program
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Black phosphorene has attracted much attention as a semiconducting two-dimensional material. Violet phosphorus is another layered semiconducting phosphorus allotrope with unique electronic and optoelectronic properties. However, no confirmed violet crystals or reliable lattice structure of violet phosphorus had been obtained. Now, violet phosphorus single crystals were produced and the lattice structure has been obtained by single-crystal x-ray diffraction to be monoclinic with space group of P2/n (13) (a=9.210, b=9.128, c=21.893 angstrom, beta=97.776 degrees). The lattice structure obtained was confirmed to be reliable and stable. The optical band gap of violet phosphorus is around 1.7 eV, which is slightly larger than the calculated value. The thermal decomposition temperature was 52 degrees C higher than its black phosphorus counterpart, which was assumed to be the most stable form. Violet phosphorene was easily obtained by both mechanical and solution exfoliation under ambient conditions.
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