Open AccessChemical Sensitization for Electric Properties Improvement of PBDB-T-SF Polymer for Solar Cells Application
Author(s) -
Laura Hrostea,
Liviu Leontie,
Mihaela Gîrtan
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/877/1/012002
Subject(s) - sensitization , polymer , thin film , materials science , ferric , electrical resistivity and conductivity , chloride , polymer chemistry , immersion (mathematics) , chemical engineering , nuclear chemistry , chemistry , nanotechnology , composite material , mathematics , engineering , pure mathematics , metallurgy , electrical engineering , immunology , biology
This paper reports the effect of ferric chloride (FeCl 3 ) sensitization on poly [(2,6 (4,8 bis (5(2ethylhexylthio)4fluorothiophen2yl)benzo[1,2b:4,5b’]dithiophene))-alt-(5,5-(1’,3’-di-2-thienyl-5’,7’-bis(2-ethylhexyl)benzo[1’,2’c:4’,5’c’]dithiophene4,8 dione)] (known as PBDB-T-SF) in thin films (93 nm thickness), spin coated onto glass and ITO substrates. The optical properties do not undergo significant changes after FeCl 3 immersion. Instead, FeCl 3 sensitization leads to a dramatic decrease in resistivity of seven orders of magnitude comparing to the pristine thin films. This change is not stable over time, depending on FeCl 3 solution concentration and polymer thin-film thickness, but remains remarkable after a new immersion.