In-situ catalyst mediated growth and self-doped silicon nanowires for use in nanowire solar cells

Manjunatha, Krishna Nama; Paul, Shashi

doi:10.1016/j.vacuum.2016.12.002

Cited by 13 publications

(4 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…374 In other studies the incorporation of high amounts of metal atoms from the seed in the Si NW host lattice can be expected on the basis of follow-up papers describing successful incorporation, but metal incorporation has not been discussed and direct proof via quantitative characterization methods is missing in these reports. 379,389,396,397,416,425 The incorporation of Au in Si from the seed is also not mentioned in most reports, even though Au concentrations in Si NWs can be in the range of the solid solubility of ∼1 × 10 17 cm −3 (∼2 × 10 −4 atom %) 234 which is significant for the electronic performance since Au introduces deep-level traps. 342 A report on doping of Si NWs with Au slightly beyond the expected thermodynamic limit via self-seeding can be found in literature.…”

Section: Metastable Group IV Nanostructuresmentioning

confidence: 99%

“…Furthermore, segregation of heteroatoms at grain/twin boundaries and incorporation of clusters in the Si NW matrix , must be excluded to confirm the formation of a solid solution. Several metal seeds have been applied as growth promoter for Si NWs including Ag, , Al, − Au, ,− Bi, ,, Co, Cu, ,, Dy, Fe, , Ga, − Gd, In, ,,, Mn, Ni, ,,, Pb, , Pd, Pt, , Sn, ,− Ti, , Zn, , and binary alloys ,,− of these elements . Among these metal seeds, only a few examples exist that facilitate the VLS/SLS growth of Si NWs and simultaneously lead to hyperdoping of the Si crystal (Table ).…”

Section: Metastable Group IV Nanostructuresmentioning

confidence: 99%

“…Reports describing surface accumulation and clustering without any sign of homogeneous incorporation or proper determination of heteroatomic species in the Si lattice are omitted, even though conductivities and electrical properties have been determined . In other studies the incorporation of high amounts of metal atoms from the seed in the Si NW host lattice can be expected on the basis of follow-up papers describing successful incorporation, but metal incorporation has not been discussed and direct proof via quantitative characterization methods is missing in these reports. ,,,,, …”

Section: Metastable Group IV Nanostructuresmentioning

confidence: 99%

See 2 more Smart Citations

Metastable Group IV Allotropes and Solid Solutions: Nanoparticles and Nanowires

2020

View full text Add to dashboard Cite

In the past decades, group IV nanowires and nanoparticles have been the subject of extensive research. Beside tremendous progress in morphological control and integration in advanced device architectures, research on allotropes and metastable compositions has gained considerable interest. Several new approaches now allow the controlled formation of specific allotropes in the nanostructured form as well as chemical compositions not attainable by traditional synthesis protocols. The conditions applied to form these metastable solid solutions and allotropes are usually far from thermodynamic equilibrium or rely on unconventional templates. The increased interest in the field of metastable group IV nanostructures arises from their altered physical properties, including tunable, direct bandgaps with energies equivalent to the near- to mid-infrared spectral region as described for materials such as Ge1–x Sn x and hexagonal Si1–x Ge x . The implementation of these material characteristics in complementary metal oxide semiconductor (CMOS) processes are desirable for applications in electronics, optoelectronics, sensors, optics, etc. but also their use as nonsurface bound nanoparticles in sensing, nanobiotechnology and nanomedicine can offer additional opportunities. This review article highlights both the important advancements and still open questions for the continued development of these nanoscaled materials for next-generation device concepts.

show abstract

Section: Metastable Group IV Nanostructuresmentioning

confidence: 99%

Section: Metastable Group IV Nanostructuresmentioning

confidence: 99%

Section: Metastable Group IV Nanostructuresmentioning

confidence: 99%

See 1 more Smart Citation

Metastable Group IV Allotropes and Solid Solutions: Nanoparticles and Nanowires

2020

View full text Add to dashboard Cite

show abstract

“…This interesting light trapping and scattering property of SiNWs, when utilised for solar cells, obviates the need of an anti-reflection coating. The enhanced absorption and anti-reflective property is attributed to the refractive index gradient [24], resonant enhancement [25], increased optical path length [26] and diffuse reflectance. The chemical composition of as-grown SiNWs scratched from the glass substrate is sprinkled onto a Gallium-Arsenide (GaAs) wafer to eliminate the influence from the glass substrate that contains Si.…”

Section: B Characterisation Of Sinwsmentioning

confidence: 99%

Comparative Study of Silicon Nanowires Grown From Ga, In, Sn, and Bi for Energy Harvesting

Manjunatha

Salaoru

Milne

2020

IEEE J. Photovoltaics

Self Cite

View full text Add to dashboard Cite

A high density of silicon nanowires for solar cell applications was fabricated on a single crystalline silicon wafer, using low eutectic temperature metal catalysts namely; gallium, indium, tin and bismuth. The use of silicon nanowires is exploited for light trapping with an aim to enhance the efficiency of solar cells. Additionally, we have optimised the deposition parameters so that there is merely deposition of amorphous silicon along with the growth of silicon nanowires. Thus, it may improve the stability of silicon based solar cells. The different catalysts used are extensively discussed with experimental results indicating stable growth and highly efficient silicon nanowires for photovoltaic applications. To test the stability, we measured the open circuit voltage for four hours and the change in voltage was ±0.05V. The fabrication of all-crystalline silicon solar cells was demonstrated using the conventional mature industrial manufacturing process that is presently used for the amorphous silicon solar cells. To summarise, this research compares various post-transition metals as a catalyst for the growth of nanowires discussing their properties, and such silicon nanowires can be utilised in several other applications not only limited to photovoltaic research.

show abstract