liu.seSearch for publications in DiVA
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • 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
Experimentally Validated Hopping-Transport Model for Energetically Disordered Organic Semiconductors
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0001-9458-7022
Show others and affiliations
2019 (English)In: Physical Review Applied, E-ISSN 2331-7019, Vol. 12, no 6, article id 064039Article in journal (Refereed) Published
Abstract [en]

Charge transport in disordered organic semiconductors occurs by hopping of charge carriers between localized sites that are randomly distributed in a strongly energy-dependent density of states. Extracting disorder and hopping parameters from experimental data, such as temperature-dependent current-voltage characteristics, typically relies on parametrized mobility functionals that are integrated in a drift-diffusion solver. Surprisingly, the functional based on the extended Gaussian disorder model (eGDM) is extremely successful at this, despite it being based on the assumption of nearest neighbor hopping (nnH) on a regular lattice. We here propose a variable-range hopping (VRH) model that is integrated in a freeware drift-diffusion solver. The mobility model is calibrated using kinetic Monte Carlo calculations and shows good agreement with the Monte Carlo calculations over the experimentally relevant part of the parameter space. The model is applied to temperature-dependent space-charge-limited current (SCLC) measurements of different systems. In contrast to the eGDM, the VRH model provides a consistent description of both p- and n-type devices. We find a critical ratio of a(NN)/alpha (mean intersite distance:localization radius) of about three, below which hopping to non-nearest neighbors becomes important around room temperature and the eGDM cannot be used for parameter extraction. Typical (Gaussian) disorder values in the range 45-120 meV are found, without any clear correlation with photovoltaic performance, when the same active layer is used in an organic solar cell.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2019. Vol. 12, no 6, article id 064039
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-162922DOI: 10.1103/PhysRevApplied.12.064039ISI: 000503051500001OAI: oai:DiVA.org:liu-162922DiVA, id: diva2:1382383
Note

Funding Agencies|Vetenskapsradet, project "OPV2.0"; European UnionEuropean Union (EU) [799477 - HyThermEl]

Available from: 2020-01-02 Created: 2020-01-02 Last updated: 2020-02-05

Open Access in DiVA

fulltext(594 kB)5 downloads
File information
File name FULLTEXT01.pdfFile size 594 kBChecksum SHA-512
f6c9e040834b5d0e59cb9fae473d3383447ed98c5e89f97e1a823201380e64133055eb4ee4978350b2df932be0d29bd45563b266486f312ceb362807744c77f4
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Search in DiVA

By author/editor
Upreti, TanviWang, YumingZhang, HuotianScheunemann, DorotheaGao, FengKemerink, Martijn
By organisation
Biomolecular and Organic ElectronicsFaculty of Science & Engineering
In the same journal
Physical Review Applied
Condensed Matter Physics

Search outside of DiVA

GoogleGoogle Scholar
Total: 5 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

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 19 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • 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