Enhanced Absorption in Organic Thin-Films from Imprinted Concave Nanostructures

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Resumé

In this work, a rapid, replicable method for imprinting concave nanostructures to be used as functional light-trapping nanostructures in organic thin-films is presented. Porous anodic alumina templates were fabricated both by anodization of thick Al foils and by anodization of submicrometer thin Al films evaporated via e-beam evaporation on Si substrates. The template formation leads to natural patterning of the underlying Al layers that are used as rigid masters for stamp fabrication, after selective etching of the porous anodic alumina. PDMS stamps were made after replicating the Al concave patterns and used for imprinting of spin coated photoresist on glass substrates. We have investigated semi-periodic and aperiodic imprinted large concave patterns fabricated from rigid masters after anodization of Al in H3PO4. We show that metal covered imprinted concaves show enhancement in absorption that is attributed to field enhancement and diffuse scattering, leading to efficient light trapping for a selected active layer material (P3HT:PCBM).
OriginalsprogEngelsk
TidsskriftMATERIALS SCIENCE (MEDŽIAGOTYRA)
Vol/bind23
Udgave nummer1
Sider (fra-til)6-11
ISSN1392-1320
DOI
StatusUdgivet - 2017

Fingeraftryk

Aluminum Oxide
Nanostructures
Alumina
Thin films
Substrates
Photoresists
Metal foil
Etching
Evaporation
Metals
Scattering
Fabrication
Glass

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title = "Enhanced Absorption in Organic Thin-Films from Imprinted Concave Nanostructures",
abstract = "In this work, a rapid, replicable method for imprinting concave nanostructures to be used as functional light-trapping nanostructures in organic thin-films is presented. Porous anodic alumina templates were fabricated both by anodization of thick Al foils and by anodization of submicrometer thin Al films evaporated via e-beam evaporation on Si substrates. The template formation leads to natural patterning of the underlying Al layers that are used as rigid masters for stamp fabrication, after selective etching of the porous anodic alumina. PDMS stamps were made after replicating the Al concave patterns and used for imprinting of spin coated photoresist on glass substrates. We have investigated semi-periodic and aperiodic imprinted large concave patterns fabricated from rigid masters after anodization of Al in H3PO4. We show that metal covered imprinted concaves show enhancement in absorption that is attributed to field enhancement and diffuse scattering, leading to efficient light trapping for a selected active layer material (P3HT:PCBM).",
author = "Goszczak, {Arkadiusz Jaroslaw} and Horst-G{\"u}nter Rubahn and Morten Madsen",
year = "2017",
doi = "10.5755/j01.ms.23.1.14188",
language = "English",
volume = "23",
pages = "6--11",
journal = "Medziagotyra",
issn = "1392-1320",
publisher = "Kaunas University of Technology",
number = "1",

}

Enhanced Absorption in Organic Thin-Films from Imprinted Concave Nanostructures. / Goszczak, Arkadiusz Jaroslaw; Rubahn, Horst-Günter; Madsen, Morten.

I: MATERIALS SCIENCE (MEDŽIAGOTYRA), Bind 23, Nr. 1, 2017, s. 6-11.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Enhanced Absorption in Organic Thin-Films from Imprinted Concave Nanostructures

AU - Goszczak, Arkadiusz Jaroslaw

AU - Rubahn, Horst-Günter

AU - Madsen, Morten

PY - 2017

Y1 - 2017

N2 - In this work, a rapid, replicable method for imprinting concave nanostructures to be used as functional light-trapping nanostructures in organic thin-films is presented. Porous anodic alumina templates were fabricated both by anodization of thick Al foils and by anodization of submicrometer thin Al films evaporated via e-beam evaporation on Si substrates. The template formation leads to natural patterning of the underlying Al layers that are used as rigid masters for stamp fabrication, after selective etching of the porous anodic alumina. PDMS stamps were made after replicating the Al concave patterns and used for imprinting of spin coated photoresist on glass substrates. We have investigated semi-periodic and aperiodic imprinted large concave patterns fabricated from rigid masters after anodization of Al in H3PO4. We show that metal covered imprinted concaves show enhancement in absorption that is attributed to field enhancement and diffuse scattering, leading to efficient light trapping for a selected active layer material (P3HT:PCBM).

AB - In this work, a rapid, replicable method for imprinting concave nanostructures to be used as functional light-trapping nanostructures in organic thin-films is presented. Porous anodic alumina templates were fabricated both by anodization of thick Al foils and by anodization of submicrometer thin Al films evaporated via e-beam evaporation on Si substrates. The template formation leads to natural patterning of the underlying Al layers that are used as rigid masters for stamp fabrication, after selective etching of the porous anodic alumina. PDMS stamps were made after replicating the Al concave patterns and used for imprinting of spin coated photoresist on glass substrates. We have investigated semi-periodic and aperiodic imprinted large concave patterns fabricated from rigid masters after anodization of Al in H3PO4. We show that metal covered imprinted concaves show enhancement in absorption that is attributed to field enhancement and diffuse scattering, leading to efficient light trapping for a selected active layer material (P3HT:PCBM).

U2 - 10.5755/j01.ms.23.1.14188

DO - 10.5755/j01.ms.23.1.14188

M3 - Journal article

VL - 23

SP - 6

EP - 11

JO - Medziagotyra

JF - Medziagotyra

SN - 1392-1320

IS - 1

ER -