Institut for Forretningsudvikling og Teknologi

High stability of benzotriazole and benzodithiophene containing medium band-gap polymer solar cell

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  • Hande Unay, Orta Dogu Teknik Universitesi
  • ,
  • Gisele A. dos Reis Benatto, Technical University of Denmark
  • ,
  • Michail J. Beliatis
  • Suren A. Gevorgyan, Technical University of Denmark
  • ,
  • Pelin Kavak, Yildiz Technical University
  • ,
  • Sema Memiş, Photonic and Electronic Sensors Laboratory
  • ,
  • Ali Cirpan, Orta Dogu Teknik Universitesi
  • ,
  • Levent Toppare, Orta Dogu Teknik Universitesi
  • ,
  • Elif Alturk Parlak, Photonic and Electronic Sensors Laboratory
  • ,
  • Frederik C. Krebs, Technical University of Denmark

The improvement of polymer solar cell stability is a challenge for the scientists and has significant implications commercially. In this study, we investigated the stability of a novel P-SBTBDT active material applied in an inverted type solar cell. Detailed stability experiments comprising shelf life, laboratory weathering and outdoor testing were carried out according to ISOS testing guidelines. Shelf life showed that P-SBTBDT solar cells were very stable after 840 h with encapsulation. Although accelerated weathering aging tests are a very harsh, the devices remained stable after the burn-in phase with T50 from 700 to 840 h, with some P-SBTBDT solar cells did not reach T50 in the time span of the test. Degradation tests on the P-SBTBDT solar cells which were carried out under natural solar light indicated that T40 was reached after 840 h. The results of dark, light, damp and dry stability tests showed that most of the degradation was provoked by failure of the encapsulation. The experiments indicated that P-SBTBDT solar cells are sensitive to light and oxygen but are strikingly stable under humid conditions. Further developments for minimizing the degradation effects using UV-filters and better encapsulation are some of the necessary improvements in further research.

OriginalsprogEngelsk
TidsskriftSolar Energy Materials and Solar Cells
Vol/bind174
Sider (fra-til)433-444
Antal sider12
ISSN0927-0248
DOI
StatusUdgivet - 2018
Eksternt udgivetJa

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