Journal ArticleDOI
Strong broadband optical absorption in silicon nanowire films
Loucas Tsakalakos,Joleyn Balch,Jody Fronheiser,Min-Yi Shih,Stephen F. LeBoeuf,Matthew Pietrzykowski,Peter J. Codella,Bas A. Korevaar,Oleg Sulima,James A. Rand,Anilkumar Davuluru,Umakant D. Rapol +11 more
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TLDR
The broadband optical absorption properties of silicon nanowire (SiNW) films fabricated on glass substrates by wet etching and chemical vapor deposition (CVD) have been measured and found to be higher than solid thin films of equivalent thickness.Abstract:
The broadband optical absorption properties of silicon nanowire (SiNW) films fabricated on glass substrates by wet etching and chemical vapor deposition (CVD) have been measured and found to be higher than solid thin films of equivalent thickness. The observed behavior is adequately explained by light scattering and light trapping though some of the observed absorption is due to a high density of surface states in the nanowires films, as evidenced by the partial reduction in high residual sub-bandgap absorption after hydrogen passivation. Finite difference time domain simulations show strong resonance within and between the nanowires in a vertically oriented array and describe the experimental absorption data well. These structures may be of interest in optical films and optoelectronic device applications.read more
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Journal ArticleDOI
Enhanced absorption and carrier collection in Si wire arrays for photovoltaic applications
Michael D. Kelzenberg,Shannon W. Boettcher,Jan Petykiewicz,Daniel B. Turner-Evans,Morgan C. Putnam,Emily L. Warren,Joshua M. Spurgeon,Ryan M. Briggs,Nathan S. Lewis,Harry A. Atwater +9 more
TL;DR: The observed absorption enhancement and collection efficiency enable a cell geometry that not only uses 1/100th the material of traditional wafer-based devices, but also may offer increased photovoltaic efficiency owing to an effective optical concentration of up to 20 times.
Journal ArticleDOI
Silicon nanowire solar cells
Loucas Tsakalakos,Joleyn Balch,Jody Fronheiser,Bastiaan Arie Korevaar,Oleg Sulima,James A. Rand +5 more
TL;DR: In this paper, the optical reflectance of the silicon nanowire solar cells is reduced by one to two orders of magnitude compared to planar cells, and a promising current density of ∼1.6mA∕cm2 for 1.8cm2 cells was obtained, with a broad external quantum efficiency of ∼12% at 690nm.
Journal ArticleDOI
Single-nanowire solar cells beyond the Shockley-Queisser limit
Peter Krogstrup,H. I. Jørgensen,Martin Heiss,Oliver Demichel,Jeppe V. Holm,Martin Aagesen,Jesper Nygård,Anna Fontcuberta i Morral +7 more
TL;DR: In this article, a single core-shell p-i-n junction GaAs nanowire solar cell grown on a silicon substrate was shown to achieve a short-circuit current of 180 mA cm-2 at 1 sun illumination, more than one order of magnitude higher than that predicted from the Lambert-Beer law.
Journal ArticleDOI
Photovoltaic Measurements in Single-Nanowire Silicon Solar Cells
Michael D. Kelzenberg,Daniel B. Turner-Evans,Brendan M. Kayes,Michael A. Filler,Morgan C. Putnam,Nathan S. Lewis,Harry A. Atwater +6 more
TL;DR: The methods described herein comprise a valuable platform for measuring the properties of semiconductor nanowires, and are expected to be instrumental when designing an efficient macroscopic solar cell based on arrays of such nanostructures.
Journal ArticleDOI
Silicon Nanowires for Photovoltaic Solar Energy Conversion
Kui-Qing Peng,Shuit-Tong Lee +1 more
TL;DR: The recent developments in the utilization of SiNWs for PV applications, the relationship between SiNW-based PV device structure and performance, and the challenges to obtaining high-performance cost-effective solar cells are reviewed.
References
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Book
Absorption and Scattering of Light by Small Particles
TL;DR: In this paper, a Potpourri of Particles is used to describe surface modes in small Particles and the Angular Dependence of Scattering is shown to be a function of the size of the particles.
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Vapor‐liquid‐solid mechanism of single crystal growth
R. S. Wagner,W. C. Ellis +1 more
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Nanowire Nanosensors for Highly Sensitive and Selective Detection of Biological and Chemical Species
TL;DR: The small size and capability of these semiconductor nanowires for sensitive, label-free, real-time detection of a wide range of chemical and biological species could be exploited in array-based screening and in vivo diagnostics.
Journal ArticleDOI
High Performance Silicon Nanowire Field Effect Transistors
TL;DR: In this article, the influence of source-drain contact thermal annealing and surface passivation on key transistor properties was examined, and it was shown that thermal annaling and passivation of oxide defects using chemical modification can increase the average transconductance from 45 to 800 nS and average mobility from 30 to 560 cm 2 /V
Journal ArticleDOI
Optical thin-film materials with low refractive index for broadband elimination of Fresnel reflection
J.-Q. Xi,Martin F. Schubert,Jong Kyu Kim,E. Fred Schubert,Minfeng Chen,Shawn-Yu Lin,W. Liu,J. A. Smart +7 more
TL;DR: Optical thin-film materials with low refractive index for broadband elimination of Fresnel reflection were used in this paper, where the authors proposed a method to eliminate the reflection in optical thin-films.