ITO with embedded silver grids as transparent conductive electrodes for large area organic solar cells

Bhushan Ramesh Patil, Mina Mirsafaei, Pawel Piotr Cielecki, André Luis Fernandes Cauduro, Jacek Fiutowski, Horst-Günter Rubahn, Morten Madsen

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

In this work, development of semi-transparent electrodes for efficient large area organic solar cells (OSCs) has been demonstrated. Electron beam evaporated silver grids were embedded in commercially available ITO coatings on glass, through a standard negative photolithography process, in order to improve the conductivity of planar ITO substrates. The fabricated electrodes with embedded line and square patterned Ag grids reduced the sheet resistance of ITO by 25 % and 40 %, respectively, showing optical transmittance drops of less than 6 % within the complete visible light spectrum for both patterns. Solution processed bulk heterojunction OSCs based on PTB7:[70]PCBM were fabricated on top of these electrodes with cell areas of 4.38 cm2, and the performance of these OSCs was compared to reference cells fabricated on pure ITO electrodes. The Fill Factor of the large-scale OSCs fabricated on ITO with embedded Ag grids was enhanced by 18 % for the line grids pattern and 30 % for the square grids pattern compared to that of the reference OSCs. The increase in the Fill Factor was directly correlated to the decrease in the series resistance of the OSCs. The maximum power conversion efficiency (PCE) of the OSCs was measured to be 4.34 %, which is 23 % higher than the PCE of the reference OSCs. As the presented method does not involve high temperature processing, it could be considered a general approach for development of large area organic electronics on solvent resistant, flexible substrates.
OriginalsprogEngelsk
Artikelnummer405303
TidsskriftNanotechnology
Vol/bind28
Udgave nummer40
Antal sider7
ISSN0957-4484
DOI
StatusUdgivet - 2017

Fingeraftryk

Silver
Electrodes
Conversion efficiency
Organic solar cells
Sheet resistance
Opacity
Photolithography
Substrates
Heterojunctions
Electron beams
Electronic equipment
Glass
Coatings
Processing

Citer dette

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title = "ITO with embedded silver grids as transparent conductive electrodes for large area organic solar cells",
abstract = "In this work, development of semi-transparent electrodes for efficient large area organic solar cells (OSCs) has been demonstrated. Electron beam evaporated silver grids were embedded in commercially available ITO coatings on glass, through a standard negative photolithography process, in order to improve the conductivity of planar ITO substrates. The fabricated electrodes with embedded line and square patterned Ag grids reduced the sheet resistance of ITO by 25 {\%} and 40 {\%}, respectively, showing optical transmittance drops of less than 6 {\%} within the complete visible light spectrum for both patterns. Solution processed bulk heterojunction OSCs based on PTB7:[70]PCBM were fabricated on top of these electrodes with cell areas of 4.38 cm2, and the performance of these OSCs was compared to reference cells fabricated on pure ITO electrodes. The Fill Factor of the large-scale OSCs fabricated on ITO with embedded Ag grids was enhanced by 18 {\%} for the line grids pattern and 30 {\%} for the square grids pattern compared to that of the reference OSCs. The increase in the Fill Factor was directly correlated to the decrease in the series resistance of the OSCs. The maximum power conversion efficiency (PCE) of the OSCs was measured to be 4.34 {\%}, which is 23 {\%} higher than the PCE of the reference OSCs. As the presented method does not involve high temperature processing, it could be considered a general approach for development of large area organic electronics on solvent resistant, flexible substrates.",
keywords = "Embedded metal grids in ITO, Transparent conductive electrodes , Large area organic solar cells, Low ITO sheet resistance, Lithography processed silver grids, Device series resistance",
author = "Patil, {Bhushan Ramesh} and Mina Mirsafaei and Cielecki, {Pawel Piotr} and {Fernandes Cauduro}, {Andr{\'e} Luis} and Jacek Fiutowski and Horst-G{\"u}nter Rubahn and Morten Madsen",
year = "2017",
doi = "10.1088/1361-6528/aa820a",
language = "English",
volume = "28",
journal = "Nanotechnology",
issn = "0957-4484",
publisher = "IOP Publishing",
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ITO with embedded silver grids as transparent conductive electrodes for large area organic solar cells. / Patil, Bhushan Ramesh; Mirsafaei, Mina; Cielecki, Pawel Piotr; Fernandes Cauduro, André Luis; Fiutowski, Jacek; Rubahn, Horst-Günter; Madsen, Morten.

I: Nanotechnology, Bind 28, Nr. 40, 405303, 2017.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - ITO with embedded silver grids as transparent conductive electrodes for large area organic solar cells

AU - Patil, Bhushan Ramesh

AU - Mirsafaei, Mina

AU - Cielecki, Pawel Piotr

AU - Fernandes Cauduro, André Luis

AU - Fiutowski, Jacek

AU - Rubahn, Horst-Günter

AU - Madsen, Morten

PY - 2017

Y1 - 2017

N2 - In this work, development of semi-transparent electrodes for efficient large area organic solar cells (OSCs) has been demonstrated. Electron beam evaporated silver grids were embedded in commercially available ITO coatings on glass, through a standard negative photolithography process, in order to improve the conductivity of planar ITO substrates. The fabricated electrodes with embedded line and square patterned Ag grids reduced the sheet resistance of ITO by 25 % and 40 %, respectively, showing optical transmittance drops of less than 6 % within the complete visible light spectrum for both patterns. Solution processed bulk heterojunction OSCs based on PTB7:[70]PCBM were fabricated on top of these electrodes with cell areas of 4.38 cm2, and the performance of these OSCs was compared to reference cells fabricated on pure ITO electrodes. The Fill Factor of the large-scale OSCs fabricated on ITO with embedded Ag grids was enhanced by 18 % for the line grids pattern and 30 % for the square grids pattern compared to that of the reference OSCs. The increase in the Fill Factor was directly correlated to the decrease in the series resistance of the OSCs. The maximum power conversion efficiency (PCE) of the OSCs was measured to be 4.34 %, which is 23 % higher than the PCE of the reference OSCs. As the presented method does not involve high temperature processing, it could be considered a general approach for development of large area organic electronics on solvent resistant, flexible substrates.

AB - In this work, development of semi-transparent electrodes for efficient large area organic solar cells (OSCs) has been demonstrated. Electron beam evaporated silver grids were embedded in commercially available ITO coatings on glass, through a standard negative photolithography process, in order to improve the conductivity of planar ITO substrates. The fabricated electrodes with embedded line and square patterned Ag grids reduced the sheet resistance of ITO by 25 % and 40 %, respectively, showing optical transmittance drops of less than 6 % within the complete visible light spectrum for both patterns. Solution processed bulk heterojunction OSCs based on PTB7:[70]PCBM were fabricated on top of these electrodes with cell areas of 4.38 cm2, and the performance of these OSCs was compared to reference cells fabricated on pure ITO electrodes. The Fill Factor of the large-scale OSCs fabricated on ITO with embedded Ag grids was enhanced by 18 % for the line grids pattern and 30 % for the square grids pattern compared to that of the reference OSCs. The increase in the Fill Factor was directly correlated to the decrease in the series resistance of the OSCs. The maximum power conversion efficiency (PCE) of the OSCs was measured to be 4.34 %, which is 23 % higher than the PCE of the reference OSCs. As the presented method does not involve high temperature processing, it could be considered a general approach for development of large area organic electronics on solvent resistant, flexible substrates.

KW - Embedded metal grids in ITO

KW - Transparent conductive electrodes

KW - Large area organic solar cells

KW - Low ITO sheet resistance

KW - Lithography processed silver grids

KW - Device series resistance

U2 - 10.1088/1361-6528/aa820a

DO - 10.1088/1361-6528/aa820a

M3 - Journal article

C2 - 28742058

VL - 28

JO - Nanotechnology

JF - Nanotechnology

SN - 0957-4484

IS - 40

M1 - 405303

ER -