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Wafer-Scale Synthesis and Optical Characterization of InP Nanowire Arrays for Solar Cells

Hrachowina, Lukas LU ; Anttu, Nicklas LU and Borgström, Magnus T. LU (2021) In Nano Letters 21(17). p.7347-7353
Abstract

Nanowire solar cells have the potential to reach the same efficiencies as the world-record III-V solar cells while using a fraction of the material. For solar energy harvesting, large-area nanowire solar cells have to be processed. In this work, we demonstrate the synthesis of epitaxial InP nanowire arrays on a 2 inch wafer. We define five array areas with different nanowire diameters on the same wafer. We use a photoluminescence mapper to characterize the sample optically and compare it to a homogeneously exposed reference wafer. Both steady-state and time-resolved photoluminescence maps are used to study the material's quality. From a mapping of reflectance spectra, we simultaneously extract the diameter and length of the nanowires... (More)

Nanowire solar cells have the potential to reach the same efficiencies as the world-record III-V solar cells while using a fraction of the material. For solar energy harvesting, large-area nanowire solar cells have to be processed. In this work, we demonstrate the synthesis of epitaxial InP nanowire arrays on a 2 inch wafer. We define five array areas with different nanowire diameters on the same wafer. We use a photoluminescence mapper to characterize the sample optically and compare it to a homogeneously exposed reference wafer. Both steady-state and time-resolved photoluminescence maps are used to study the material's quality. From a mapping of reflectance spectra, we simultaneously extract the diameter and length of the nanowires over the full wafer. The extracted knowledge of large-scale nanowire synthesis will be crucial for the upscaling of nanowire-based solar cells, and the demonstrated wafer-scale characterization methods will be central for quality control during manufacturing.

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author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
EBIC, InP nanowires, MOVPE, PL, reflectance, TRPL
in
Nano Letters
volume
21
issue
17
pages
7 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • pmid:34449221
  • scopus:85114669485
ISSN
1530-6984
DOI
10.1021/acs.nanolett.1c02542
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2021 The Authors. Published by American Chemical Society.
id
948f6b28-83f3-413c-a135-ab45fb27343f
date added to LUP
2021-10-13 14:42:57
date last changed
2024-09-08 02:08:09
@article{948f6b28-83f3-413c-a135-ab45fb27343f,
  abstract     = {{<p>Nanowire solar cells have the potential to reach the same efficiencies as the world-record III-V solar cells while using a fraction of the material. For solar energy harvesting, large-area nanowire solar cells have to be processed. In this work, we demonstrate the synthesis of epitaxial InP nanowire arrays on a 2 inch wafer. We define five array areas with different nanowire diameters on the same wafer. We use a photoluminescence mapper to characterize the sample optically and compare it to a homogeneously exposed reference wafer. Both steady-state and time-resolved photoluminescence maps are used to study the material's quality. From a mapping of reflectance spectra, we simultaneously extract the diameter and length of the nanowires over the full wafer. The extracted knowledge of large-scale nanowire synthesis will be crucial for the upscaling of nanowire-based solar cells, and the demonstrated wafer-scale characterization methods will be central for quality control during manufacturing. </p>}},
  author       = {{Hrachowina, Lukas and Anttu, Nicklas and Borgström, Magnus T.}},
  issn         = {{1530-6984}},
  keywords     = {{EBIC; InP nanowires; MOVPE; PL; reflectance; TRPL}},
  language     = {{eng}},
  month        = {{09}},
  number       = {{17}},
  pages        = {{7347--7353}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{Nano Letters}},
  title        = {{Wafer-Scale Synthesis and Optical Characterization of InP Nanowire Arrays for Solar Cells}},
  url          = {{http://dx.doi.org/10.1021/acs.nanolett.1c02542}},
  doi          = {{10.1021/acs.nanolett.1c02542}},
  volume       = {{21}},
  year         = {{2021}},
}