In:
Journal of Physics D: Applied Physics, IOP Publishing, Vol. 55, No. 43 ( 2022-10-27), p. 435501-
Abstract:
The structural, electronic, and optical properties of two-dimensional (2D) low-symmetry orthorhombic IV-V 2 bilayer heterostructures (HSs) were investigated using first-principles calculations. Our data show that all the constructed bilayer HSs (SiAs 2 /GeAs 2 , SiAs 2 /SiP 2 and SiP 2 /GeAs 2 ) are stabilized by van der Waals interaction. The IV-V 2 bilayer HSs exhibit strong visible light absorption and type-II band alignments, which are beneficial for the effective separation of photo-generated electron – hole pairs in solar cells. Notably, the 2D SiAs 2 /GeAs 2 HS-based solar cell exhibits a record-high power conversion efficiency (23.98%) higher than those of previously-reported 2D HSs-based solar cells obtained by high-throughput computational screening, owing to its small conduction band offset (0.2 eV) and suitable bandgap (1.49 eV). Our results provide insights into the structures and electronic and photovoltaic properties of the IV-V 2 bilayer HSs and may be useful for related 2D solar cell applications.
Type of Medium:
Online Resource
ISSN:
0022-3727
,
1361-6463
DOI:
10.1088/1361-6463/ac893f
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2022
detail.hit.zdb_id:
209221-9
detail.hit.zdb_id:
1472948-9
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