A protocrystalline phase is a distinct phase occurring during crystal growth, which evolves into a microcrystalline form. The term is typically associated with silicon films in optical applications such as solar cells.[1]
Applications
[edit]Silicon solar cells
[edit]Amorphous silicon (a-Si) is a popular solar cell material owing to its low cost and ease of production. Owing to its disordered structure (Urbach tail), its absorption extends to the energies below the band gap, resulting in a wide-range spectral response; however, it has a relatively low solar cell efficiency. Protocrystalline Si (pc-Si:H) also has a relatively low absorption near the band gap, owing to its more ordered crystalline structure. Thus, protocrystalline and amorphous silicon can be combined in a tandem solar cell, where the top thin layer of a-Si:H absorbs short-wavelength light whereas the underlying protocrystalline silicon layer absorbs the longer wavelengths[2]
See also
[edit]References
[edit]- ^ Ishikawa, Yasuaki; Schubert, Markus B. (2006-09-07). "Flexible Protocrystalline Silicon Solar Cells with Amorphous Buffer Layer". Japanese Journal of Applied Physics. 45 (9A): 6812–6822. doi:10.1143/jjap.45.6812. ISSN 0021-4922.
- ^ Ahn, Jun Yong; Jun, Kyung Hoon; Lim, Koeng Su; Konagai, Makoto (2003-03-10). "Stable protocrystalline silicon and unstable microcrystalline silicon at the onset of a microcrystalline regime". Applied Physics Letters. 82 (11): 1718–1720. Bibcode:2003ApPhL..82.1718A. doi:10.1063/1.1561161. ISSN 0003-6951.
External links
[edit]- Wilken, Karen (2017). "Low temperature thin-film silicon solar cells on flexible plastic substrates" (PDF). Advances in Systems Analysis. 377. Forschungszentrum, Zentralbibliothek. hdl:2128/14543. ISBN 978-3-95806-235-1. ISSN 1866-1793. OCLC 1075618416.
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction