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A Comparative Study of Absorption in Vertically and Laterally Oriented InP Core–Shell Nanowire Photovoltaic Devices
Division of Solid State Physics and The Nanometer Structure Consortium, Lund University, Sweden. (Nanometerkonsortiet)
Division of Solid State Physics and The Nanometer Structure Consortium, Lund University, Sweden. (Nanometerkonsortiet)
Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS), MPE-lab. Division of Solid State Physics and The Nanometer Structure Consortium, Lund University, Sweden.ORCID iD: 0000-0001-5993-8106
Division of Solid State Physics and The Nanometer Structure Consortium, Lund University, Sweden. (Nanometerkonsortiet)
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2015 (English)In: Nano letters (Print), ISSN 1530-6984, E-ISSN 1530-6992, Vol. 15, no 3, 1809-1814 p.Article in journal, Letter (Refereed) Published
Abstract [en]

We have compared the absorption in InP core-shell nanowire p-i-n junctions in lateral and vertical orientation. Arrays of vertical core-shell nanowires with 400 nm pitch and 280 nm diameter, as well as corresponding lateral single core-shell nanowires, were configured as photovoltaic devices. The photovoltaic characteristics of the samples, measured under 1 sun illumination, showed a higher absorption in lateral single nanowires compared to that in individual vertical nanowires, arranged in arrays with 400 nm pitch. Electromagnetic modeling of the structures confirmed the experimental observations and showed that the absorption in a vertical nanowire in an array depends strongly on the array pitch. The modeling demonstrated that, depending on the array pitch, absorption in a vertical nanowire can be lower or higher than that in a lateral nanowire with equal absorption predicted at a pitch of 510 nm for our nanowire geometry. The technology described in this Letter facilitates quantitative comparison of absorption in laterally and vertically oriented core-shell nanowire p-i-n junctions and can aid in the design, optimization, and performance evaluation of nanowire-based core-shell photovoltaic devices. © 2014 American Chemical Society.

Place, publisher, year, edition, pages
Washington: American Chemical Society (ACS), 2015. Vol. 15, no 3, 1809-1814 p.
Keyword [en]
Nanowire, absorption, solar cell, photovoltaics, core-shell, radial, InP
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:hh:diva-30039DOI: 10.1021/nl504559gISI: 000351188000056PubMedID: 25671437Scopus ID: 2-s2.0-84924598071OAI: oai:DiVA.org:hh-30039DiVA: diva2:882878
Funder
Swedish Research CouncilKnut and Alice Wallenberg Foundation
Note

Other funding agencies:Nordic innovation program NANORDSUN, Swedish Foundation for Strategic Research (SSF), Swedish Energy Agency, Nanometer Structure Consortium at Lund University (nmC@LU)

Available from: 2015-12-15 Created: 2015-12-15 Last updated: 2017-12-01Bibliographically approved

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jain, Vishal

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