Open AccessEffect of polymer morphology on P3HT-based solid-state dye sensitized solar cells: an ultrafast spectroscopic investigation
Author(s) -
Ravi Kumar,
Giulia Grancini,
Annamaria Petrozza,
Agnese Abrusci,
Henry J. Snaith,
Guglielmo Lanzani
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.00a469
Subject(s) - materials science , dye sensitized solar cell , ultrashort pulse , annealing (glass) , optoelectronics , ultrafast laser spectroscopy , polymer , solar cell , solid state , absorption (acoustics) , energy conversion efficiency , optics , chemistry , composite material , laser , physics , electrode , electrolyte
Solid-state dye sensitized solar cell devices are fabricated with poly(3-hexylthiophene) (P3HT) as the hole transporting layer. Upon annealing treatment we obtained ≈ 70% increase in the device efficiency compared to un-annealed devices. Our investigation, by means of ultrafast transient absorption spectroscopic characterization, correlates the increased device performances to a more efficient hole-transfer at the dye/polymer interface in the thermally treated P3HT.