Ellipsometry as a Nondestructive Depth Profiling Tool for Roll-to-Roll Manufactured Flexible Solar Cells

Publication: Research - peer-reviewJournal article – Annual report year: 2011

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@article{2bb31161e8874125b76bcc12d4257ffb,
title = "Ellipsometry as a Nondestructive Depth Profiling Tool for Roll-to-Roll Manufactured Flexible Solar Cells",
keywords = "Polymer solar cells, Plastsolceller",
publisher = "American Chemical Society",
author = "{Vesterager Madsen}, Morten and Sylvester-Hvid, {Kristian O.} and Babak Dastmalchi and Kurt Hingerl and Kion Norrman and Thomas Tromholt and Matthieu Manceau and Dechan Angmo and Krebs, {Frederik C}",
note = "This work was supported by the Photovoltaic European Research Area Network (PV-ERA-NET), under the project acronym POLYSTAR and by the European Commission through the Seventh Framework Programme for Research and Technological Development under the Information and Communication Technologies (ICT) project acronym HIFLEX (Grant Number 248678).",
year = "2011",
doi = "10.1021/jp2004002",
volume = "115",
number = "21",
pages = "10817--10822",
journal = "Journal of Physical Chemistry Part C: Nanomaterials and Interfaces",
issn = "1932-7447",

}

RIS

TY - JOUR

T1 - Ellipsometry as a Nondestructive Depth Profiling Tool for Roll-to-Roll Manufactured Flexible Solar Cells

A1 - Vesterager Madsen,Morten

A1 - Sylvester-Hvid,Kristian O.

A1 - Dastmalchi,Babak

A1 - Hingerl,Kurt

A1 - Norrman,Kion

A1 - Tromholt,Thomas

A1 - Manceau,Matthieu

A1 - Angmo,Dechan

A1 - Krebs,Frederik C

AU - Vesterager Madsen,Morten

AU - Sylvester-Hvid,Kristian O.

AU - Dastmalchi,Babak

AU - Hingerl,Kurt

AU - Norrman,Kion

AU - Tromholt,Thomas

AU - Manceau,Matthieu

AU - Angmo,Dechan

AU - Krebs,Frederik C

PB - American Chemical Society

PY - 2011

Y1 - 2011

N2 - We show that it is possible to perform ellipsometry on large area roll-to-roll (R2R) coated solar cells on flexible substrates and further demonstrate that the slot-die coating technique employed yields the same bulk heterojunction (BHJ) film morphology and vertical phase separation as laboratory samples prepared by the spin coating technique. The solar cell device geometry was Kapton/Al/Cr/P3HT:PCBM/PEDOT:PSS/Ag. Variable angle ellipsometry was used to determine the optical dispersions of the pure phases of P3HT and PCBM allowing an effective medium approximation model to be employed. It was found that a top layer phase separation of P3HT and a vertical linear gradient of P3HT and PCBM best described the BHJ layer. The model was tested for samples of varying thickness and blend composition, model parameters including thickness (AFM), vertical composition (XPS depth profiling), and optical transmission (optical simulation and UV–visible spectroscopy comparisons) was confirmed to comply with the model. A means of quality testing and optimization of the coating procedure line scans across a R2R slot-die-coated sample over large distances (8 cm) was made giving insight into thickness and composition uniformity.

AB - We show that it is possible to perform ellipsometry on large area roll-to-roll (R2R) coated solar cells on flexible substrates and further demonstrate that the slot-die coating technique employed yields the same bulk heterojunction (BHJ) film morphology and vertical phase separation as laboratory samples prepared by the spin coating technique. The solar cell device geometry was Kapton/Al/Cr/P3HT:PCBM/PEDOT:PSS/Ag. Variable angle ellipsometry was used to determine the optical dispersions of the pure phases of P3HT and PCBM allowing an effective medium approximation model to be employed. It was found that a top layer phase separation of P3HT and a vertical linear gradient of P3HT and PCBM best described the BHJ layer. The model was tested for samples of varying thickness and blend composition, model parameters including thickness (AFM), vertical composition (XPS depth profiling), and optical transmission (optical simulation and UV–visible spectroscopy comparisons) was confirmed to comply with the model. A means of quality testing and optimization of the coating procedure line scans across a R2R slot-die-coated sample over large distances (8 cm) was made giving insight into thickness and composition uniformity.

KW - Polymer solar cells

KW - Plastsolceller

U2 - 10.1021/jp2004002

DO - 10.1021/jp2004002

JO - Journal of Physical Chemistry Part C: Nanomaterials and Interfaces

JF - Journal of Physical Chemistry Part C: Nanomaterials and Interfaces

SN - 1932-7447

IS - 21

VL - 115

SP - 10817

EP - 10822

ER -