hh.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Electrical and optical properties of InP nanowire ensemble p(+)-i-n(+) photodetectors
Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS), MPE-lab.
Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS), MPE-lab.
Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS), MPE-lab.
Solid State Physics and the Nanometer Structure Consortium, Lund University, Lund, Sweden.
Show others and affiliations
2012 (English)In: Nanotechnology, ISSN 0957-4484, E-ISSN 1361-6528, Vol. 23, no 13, 135201Article in journal (Refereed) Published
Abstract [en]

We report on a comprehensive study of electrical and optical properties of efficient near-infrared p(+)-i-n(+) photodetectors based on large ensembles of self-assembled, vertically aligned i-n(+) InP nanowires monolithically grown on a common p(+) InP substrate without any buffer layer. The nanowires have a polytype modulated crystal structure of wurtzite and zinc blende. The electrical data display excellent rectifying behavior with an ideality factor of about 2.5 at 300 K. The ideality factor scales with 1/T, which possibly reflects deviations from classical transport models due to the mixed crystal phase of the nanowires. The observed dark leakage current is of the order of merely similar to 100 fA/nanowire at 1 V reverse bias. The detectors display a linear increase of the photocurrent with reverse bias up to about 10 pA/nanowire at 5 V. From spectrally resolved measurements, we conclude that the photocurrent is primarily generated by funneling photogenerated carriers from the substrate into the NWs. Contributions from direct excitation of the NWs become increasingly important at low temperatures. The photocurrent decreases with temperature with an activation energy of about 50 meV, which we discuss in terms of a temperature-dependent diffusion length in the substrate and perturbed transport through the mixed-phase nanowires. © 2012 IOP Publishing Ltd.

Place, publisher, year, edition, pages
Bristol, UK: Institute of Physics Publishing (IOPP), 2012. Vol. 23, no 13, 135201
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:hh:diva-18867DOI: 10.1088/0957-4484/23/13/135201ISI: 000301663900001Scopus ID: 2-s2.0-84858387129OAI: oai:DiVA.org:hh-18867DiVA: diva2:537643
Funder
Swedish Research Council
Note

Funding: Halmstad University, Erik Johan Ljungberg Foundation, Carl Trygger Foundation, Swedish Research Council, Swedish National Board for Industrial and Technological Development, Swedish Foundation for Strategic Research, EU (grant no. 214814) & E.ON AG as part of the E.ON International Research Initiative 

Available from: 2012-06-27 Created: 2012-06-25 Last updated: 2017-04-18Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Pettersson, HåkanZubritskaya, IrinaNghia, Ngo TuanLandin, Lars
By organisation
MPE-lab
In the same journal
Nanotechnology
Condensed Matter Physics

Search outside of DiVA

GoogleGoogle Scholar

Altmetric score

Total: 163 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf