Journal ArticleDOI
InP Nanowire Array Solar Cells Achieving 13.8% Efficiency by Exceeding the Ray Optics Limit
Jesper Wallentin,Nicklas Anttu,Damir Asoli,Maria Huffman,Ingvar Åberg,Martin Magnusson,Gerald Siefer,Peter Fuss-Kailuweit,Frank Dimroth,Bernd Witzigmann,Hongqi Xu,Hongqi Xu,Lars Samuelson,Knut Deppert,Magnus T. Borgström +14 more
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TLDR
It is reported that arrays of p-i-n InP nanowires (that switch from positive to negative doping), grown to millimeter lengths, can be optimized by varying the nanowire diameter and length of the n-doped segment, which are comparable to the best planar InP photovoltaics.Abstract:
Photovoltaics based on nanowire arrays could reduce cost and materials consumption compared with planar devices but have exhibited low efficiency of light absorption and carrier collection. We fabricated a variety of millimeter-sized arrays of p-type/intrinsic/n-type (p-i-n) doped InP nanowires and found that the nanowire diameter and the length of the top n-segment were critical for cell performance. Efficiencies up to 13.8% (comparable to the record planar InP cell) were achieved by using resonant light trapping in 180-nanometer-diameter nanowires that only covered 12% of the surface. The share of sunlight converted into photocurrent (71%) was six times the limit in a simple ray optics description. Furthermore, the highest open-circuit voltage of 0.906 volt exceeds that of its planar counterpart, despite about 30 times higher surface-to-volume ratio of the nanowire cell.read more
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Design Principles for Fabrication of InP-Based Radial Junction Nanowire Solar Cells Using an Electron Selective Contact
TL;DR: In this article, a core-shell heterojunction solar cell using p-InP as a core material and ITO/ZnO as a shell material was proposed, and it was shown that using an oxide coating over InP core can significantly increase the absorption in InP nanowire arrays.
Journal ArticleDOI
Energy Upconversion in GaP/GaNP Core/Shell Nanowires for Enhanced Near‐Infrared Light Harvesting
TL;DR: The revealed defect-mediated TS-TPA process can boost efficiency of harvesting solar energy in GaNP NWs, beneficial for applications of this novel material system in third-generation photovoltaic devices.
Journal ArticleDOI
High brightness InP micropillars grown on silicon with Fermi-level splits larger than 1 eV
Thai Tran,Hao Sun,Fan Ren,Kar Wei Ng,Kun Li,Fanglu Lu,Eli Yablonovitch,Constance J. Chang-Hasnain +7 more
TL;DR: Characteristics of micron-sized, single-crystalline, Wurzite-phased InP crystals directly grown on silicon substrates for photovoltaics applications confirm that InP is a promising materials choice forPhotovoltaic devices in which the light absorber exhibits large surface-to-volume ratios.
Journal ArticleDOI
Periodically patterned Si pyramids for realizing high efficient solar cells by wet etching process
TL;DR: In this article, an electrical conductor of a thin indium-tin-oxide (ITO) layer was applied onto the patterned Si structures as an anti-reflection coating layer, which effectively reduced the light-reflectance at a surface.
Journal ArticleDOI
Nonpolar-Oriented Wurtzite InP Nanowires with Electron Mobility Approaching the Theoretical Limit
Jiamin Sun,Yanxue Yin,Mingming Han,Zaixing Yang,Changyong Lan,Lizhe Liu,Ying Wang,Ning Han,Lifan Shen,Xinglong Wu,Johnny C. Ho +10 more
TL;DR: Nonpolar-oriented defect-free wurtzite InP NWs with electron mobility of as high as 2000 cm2 V-1 s-1 can be successfully synthesized via Pd-catalyzed vapor-solid-solid growth through PdIn catalyst particles' minimal lattice mismatch at the InP nucleation frontier.
References
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Journal ArticleDOI
A low-cost, high-efficiency solar cell based on dye-sensitized colloidal TiO2 films
TL;DR: In this article, the authors describe a photovoltaic cell, created from low-to medium-purity materials through low-cost processes, which exhibits a commercially realistic energy-conversion efficiency.
Journal ArticleDOI
Porphyrin-Sensitized Solar Cells with Cobalt (II/III)–Based Redox Electrolyte Exceed 12 Percent Efficiency
Aswani Yella,Hsuan-Wei Lee,Hoi Nok Tsao,Chenyi Yi,Aravind Kumar Chandiran,Md. K. Nazeeruddin,Eric Wei-Guang Diau,Chen-Yu Yeh,Shaik M. Zakeeruddin,Michael Grätzel +9 more
TL;DR: In this article, a Co(II/III)tris(bipyridyl)-based redox electrolyte was used in conjunction with a custom synthesized donor-π-bridge-acceptor zinc porphyrin dye as sensitizer (designated YD2-o-C8).
Journal Article
Porphyrin-sensitized solar cells with cobalt (II/III)-based redox electrolyte exceed 12 percent efficiency (vol 334, pg 629, 2011)
TL;DR: Mesoscopic solar cells that incorporate a Co(II/III)tris(bipyridyl)–based redox electrolyte in conjunction with a custom synthesized donor-π-bridge-acceptor zinc porphyrin dye as sensitizer are reported, enabling attainment of strikingly high photovoltages approaching 1 volt.
Journal ArticleDOI
Hybrid Nanorod-Polymer Solar Cells
TL;DR: It is demonstrated that semiconductor nanorods can be used to fabricate readily processed and efficient hybrid solar cells together with polymers and Tuning the band gap by altering the nanorod radius enabled us to optimize the overlap between the absorption spectrum of the cell and the solar emission spectrum.
Journal ArticleDOI
Light Trapping in Silicon Nanowire Solar Cells
Erik C. Garnett,Peidong Yang +1 more
TL;DR: It is demonstrated that ordered arrays of silicon nanowires increase the path length of incident solar radiation by up to a factor of 73, which is above the randomized scattering (Lambertian) limit and is superior to other light-trapping methods.