Study of photocurrent generation in InP nanowire-based p(+)-i-n(+) photodetectors

Jain, Vishal (author): Högskolan i Halmstad,Lund University,Lunds universitet,Fasta tillståndets fysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Solid State Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,Tillämpad matematik och fysik (MPE-lab),Solid State Physics and the Nanometer Structure Consortium, Lund University, Lund, Sweden,Nanovetenskap

Nowzari, Ali (author): Lund University,Lunds universitet,Fasta tillståndets fysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Solid State Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,Lund University, Lund, Sweden,Solid State Physics and the Nanometer Structure Consortium

Wallentin, Jesper (author): Lund University,Lunds universitet,Fasta tillståndets fysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Solid State Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,Lund University, Lund, Sweden,Solid State Physics and the Nanometer Structure Consortium

Borgström, Magnus (author): Lund University,Lunds universitet,Fasta tillståndets fysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Solid State Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,Lund University, Lund, Sweden,Solid State Physics and the Nanometer Structure Consortium

Messing, Maria (author): Lund University,Lunds universitet,Fasta tillståndets fysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Solid State Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,Lund University, Lund, Sweden,Solid State Physics and the Nanometer Structure Consortium

Graczyk, Mariusz (author): Lund University,Lunds universitet,Fasta tillståndets fysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Solid State Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,Lund University, Lund, Sweden,Solid State Physics and the Nanometer Structure Consortium

Witzigmann, Bernd (author): University of Kassel, Kassel, Germany,Department of Computational Electronics and Photonics

Capasso, Federico (author): Harvard University, Cambridge, Massachusetts, USA,School of Engineering and Applied Sciences

Samuelson, Lars (author): Lund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Fasta tillståndets fysik,Fysiska institutionen,Institutioner vid LTH,Other operations, LTH,Faculty of Engineering, LTH,Solid State Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,Lund University, Lund, Sweden,Solid State Physics and the Nanometer Structure Consortium

Pettersson, Håkan (author): Högskolan i Halmstad,Lund University,Lunds universitet,Fasta tillståndets fysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Solid State Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,Tillämpad matematik och fysik (MPE-lab),Nanovetenskap

(creator_code:org_t)

2015-01-07
2014
English.
In: Nano Reseach. - Beijing & Berlin/Heidelberg : Springer Science and Business Media LLC. - 1998-0124 .- 1998-0000. ; 7:4, s. 544-552

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Abstract Subject headings

We report on electrical and optical properties of p(+)-i-n(+)photodetectors/solar cells based on square millimeter arrays of InP nanowires (NWs) grown on InP substrates. The study includes a sample series where the p(+)-segment length was varied between 0 and 250 nm, as well as solar cells with 9.3% efficiency with similar design. The electrical data for all devices display clear rectifying behavior with an ideality factor between 1.8 and 2.5 at 300 K. From spectrally resolved photocurrent measurements, we conclude that the photocurrent generation process depends strongly on the p(+)-segment length. Without a p(+)-segment, photogenerated carriers funneled from the substrate into the NWs contribute strongly to the photocurrent. Adding a p(+)-segment decouples the substrate and shifts the depletion region, and collection of photogenerated carriers, to the NWs, in agreement with theoretical modeling. In optimized solar cells, clear spectral signatures of interband transitions in the zinc blende and wurtzite InP layers of the mixed-phase i-segments are observed. Complementary electroluminescence, transmission electron microscopy (TEM), as well as measurements of the dependence of the photocurrent on angle of incidence and polarization, support our interpretations.

TEKNIK OCH TEKNOLOGIER -- Nanoteknik -- Nanoteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY -- Nano-technology -- Nano-technology (hsv//eng)
NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
NATURVETENSKAP -- Matematik (hsv//swe)
NATURAL SCIENCES -- Mathematics (hsv//eng)
MEDICIN OCH HÄLSOVETENSKAP -- Annan medicin och hälsovetenskap (hsv//swe)
MEDICAL AND HEALTH SCIENCES -- Other Medical and Health Sciences (hsv//eng)

By the author/editor: Jain, Vishal; Nowzari, Ali; Wallentin, Jespe ...; Borgström, Magnu ...; Messing, Maria; Asoli, Damir; show more...; Graczyk, Mariusz; Witzigmann, Bern ...; Capasso, Federic ...; Samuelson, Lars; Pettersson, Håka ...; show less...

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Nano technology; and Nano technology

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Condensed Matter ...

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