On the indentation-assisted phase engineered Si for solar applications. (15th July 2020)

• Record Type: Journal Article
• Authors: Mannepalli, Sowjanya; Sagade, Abhay A.; Mangalampalli, Kiran S.R.N.
• Is Part Of: Scripta materialia. Number 184(2020)
• Page Start: 19
• Page End: 23
• Publication Date: 2020-07-15
• Subjects: Nanoindentation -- Phase transformations -- Rhombohedral silicon -- Optical properties; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2020.03.037
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: The rhombohedral phase of silicon is fabricated over a large-area within the diamond cubic Si wafer using spherical nanoindentation. The ultraviolet and visible spectrum showed a ~50% lower reflectance for the rhombohedral Si compared to the pristine Si. The estimated refractive index of ~6.7 at 630 nm for the rhombohedral Si is ~35% higher than the diamond cubic Si, which agrees well with the theoretical calculations. The rhombohedral Si with enhanced light absorption ability is utilized as a solar absorber layer for the bare p-n junction Si solar cell and observed to show ~10 times improvement in the photocurrent density. Graphical abstract: Image, graphical abstract