Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
LED Array Frequency Dependent Photocurrent Imaging of Organic Solar Cell Modules
Linköping University, Department of Physics, Chemistry and Biology. (Biorgel)
2017 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

To mitigate the risk for devastating climate changes, there is an urgent need to change the energy production from the current fossil based to renewable sources. Solar cells will contribute to an increasing share of the future energy systems. Today silicon solar cells dominate the market but printed organic solar cells are promising alternatives in terms of cost, flexibility, possibilities for building integrations and energy payback times. Printing enables roll-to-roll processing that is quick and renders huge volumes. Thus, also characterization and quality control must be fast. Recent tests have been performed showing that a LED array with amplitude modulated LEDs can be used to provide photocurrent images of modules with series connected sub cells in-line during manufacturing. The purpose of this thesis work is to further evaluate and develop this LED array characterization technique focusing on contact methods and signal interpretation. Two modes were examined; a contact mode and a capacitive contact-less mode. Both modes gave comparable results and indicated strong variations in performance of sub cells in the measured modules. Other methods to address individual cells also showed similar behavior. However, by manually adding extra contact points, current-voltage curves could be measured on the individual sub cells in the modules. Extraction of photocurrents were similar, but the parallel resistances varied strongly between the cells in the module. Increasing the frequency of the LEDs resulted in less variations. Calculations indicated that this frequency dependence could be used to separate the photocurrent generation and parallel resistance in the sub cells.

Place, publisher, year, edition, pages
2017. , p. 53
Keywords [en]
LED array, organic solar cells, characterization, LBIC, OBIC
National Category
Engineering and Technology Materials Engineering
Identifiers
URN: urn:nbn:se:liu:diva-138683ISRN: LITH-IFM-A-EX—17/3397—SEOAI: oai:DiVA.org:liu-138683DiVA, id: diva2:1112972
External cooperation
Epishine
Subject / course
Physics
Supervisors
Examiners
Available from: 2017-06-22 Created: 2017-06-21 Last updated: 2017-06-22Bibliographically approved

Open Access in DiVA

fulltext(4989 kB)106 downloads
File information
File name FULLTEXT01.pdfFile size 4989 kBChecksum SHA-512
bfdce4e7a831ce5acc12524313627d14756491f35187da512f09a336b01c7d66d661cedd464185efa9d81b3f815c44e7af465b5b5cf61b98141d77fb1ced66c0
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Anderberg, Elin
By organisation
Department of Physics, Chemistry and Biology
Engineering and TechnologyMaterials Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 106 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 398 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf