Semiconducting Group 15 Monolayers: A Broad Range of Band Gaps and High Carrier Mobilities

Optoelectronic applications require materials both responsive to objective photons and able to transfer carriers, so new two-dimensional (2D) semiconductors with appropriate band gaps and high mobilities are highly desired. A broad range of band gaps and high mobilities of a 2D semiconductor family, composed of monolayer of Group 15 elements (phosphorene, arsenene, antimonene, bismuthene) is presented. The calculated binding energies and phonon band dispersions of 2D Group 15 allotropes exhibit thermodynamic stability. The energy band gaps of 2D semiconducting Group 15 monolayers cover a wide range from 0.36 to 2.62 eV, which are crucial for broadband photoresponse. Significantly, phosphorene, arsenene, and…

• NS
  National Science Foundation

  Award: Grant EPS-10024109
• NN
  National Natural Science Foundation of China

  Awards: 5151101197, 51572128, 21403109
• CA
  Chinese Academy of Sciences
• GO
  Government of Jiangsu Province
• PA
  Priority Academic Program Development of Jiangsu Higher Education Institutions
• NK
  National Key Research and Development Program of China

  Award: 2014CB931700