Improving photoconductance of fluorinated donors with fluorinated acceptors

Logan E. Garner, Bryon Larson, Stefan Oosterhout, Zbyslaw Owczarczyk, Dana C. Olson, Nikos Kopidakis, Olga V. Boltalina, Steven H. Strauss, Wade A. Braunecker

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

1 Citation (Scopus)

Abstract

This work investigates the influence of fluorination of both donor and acceptor materials on the generation of free charge carriers in small molecule donor/fullerene acceptor BHJ OPV active layers. A fluorinated and non-fluorinated small molecule analogue were synthesized and their optoelectronic properties characterized. The intrinsic photoconductance of blends of these small molecule donors was investigated using time-resolved microwave conductivity. Blends of the two donor molecules with a traditional non-fluorinated fullerene (PC70BM) as well as a fluorinated fullerene (C60(CF3)2-1) were investigated using 5% and 50% fullerene loading. We demonstrate for the first time that photoconductance in a 50:50 donor:acceptor BHJ blend using a fluorinated fullerene can actually be improved relative to a traditional non-fluorinated fullerene by fluorinating the donor molecule as well.

Original languageEnglish
Title of host publicationPVSC 2016
Subtitle of host publicationProceedings of the 2016 IEEE 43rd Photovoltaic Specialists Conference
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages1068-1071
Number of pages4
ISBN (Electronic)9781509027248
DOIs
Publication statusPublished - 18 Nov 2016
Externally publishedYes
Event43rd IEEE Photovoltaic Specialists Conference, PVSC 2016 - Portland, United States
Duration: 5 Jun 201610 Jun 2016

Other

Other43rd IEEE Photovoltaic Specialists Conference, PVSC 2016
CountryUnited States
CityPortland
Period5/06/1610/06/16

Keywords

  • Organic semiconductors
  • photoconductivity

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