Blocking layer optimisation of poly(3-hexylthiopene)based solid state dye sensitized solar cells

Matteocci, F., Mincuzzi, G., Giordano, F., Capasso, A., Artuso, E., Barolo, C., Viscardi, G., Brown, T.M., Reale, A., & Di Carlo, A. (2013) Blocking layer optimisation of poly(3-hexylthiopene)based solid state dye sensitized solar cells. Organic Electronics, 14(7), pp. 1882-1890.

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Abstract

The optimisation study of the fabrication of a compact TiO2 blocking layer (via Spray Pyrolysis Deposition) for poly (3-hexylthiopene) (P3HT) for Solid State Dye Sensitized Solar Cells (SDSCs) is reported. We used a novel spray TiO2 precursor solution composition obtained by adding acetylacetone to a conventional formulation (Diisopropoxytitanium bis (acetylacetonate) in ethanol). By Scanning Electron Microscopy a TiO2 layer with compact morphology and thickness of around 100 nmis shown. Through a Tafel plot analysis an enhancement of the device diode-like behaviour induced by the acetylacetone blocking layer respect to the conventional one is observed. Significantly, the device fabricatedwith the acetylacetone blocking layer shows an overall increment of the cell performance with respect to the cellwith the conventional one (DJsc/Jsc = +13.8%, DFF/FF = +39.7%, DPCE/PCE = +55.6%). A conversion efficiency optimumis found for 15 successive spray cycles where the diode-like behaviour of the acetylacetone blocking layer is more effective. Over three batches of cells (fabricated with P3HT and dye D35) an average conversion efficiency value of 3.9% (under a class A sun simulator with 1 sun A.M. 1.5 illumination conditions) was measured. From the best cell we fabricated a conversion efficiency value of 4.5% was extracted. This represents a significant increment with respect to previously reported values for P3HT/dye D35 based SDSCs.

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28 citations in Scopus
29 citations in Web of Science®
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ID Code: 60697
Item Type: Journal Article
Refereed: Yes
Keywords: Solid State Dye Sensitized Solar Cell, Compact layer TiO2, Poly(3-hexylthiopene), Organic dye, Spray Pyrolysis Deposition
DOI: 10.1016/j.orgel.2013.03.037
ISSN: 1566-1199
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > ELECTRICAL AND ELECTRONIC ENGINEERING (090600) > Photodetectors Optical Sensors and Solar Cells (090605)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MATERIALS ENGINEERING (091200) > Organic Semiconductors (091208)
Australian and New Zealand Standard Research Classification > TECHNOLOGY (100000) > NANOTECHNOLOGY (100700)
Australian and New Zealand Standard Research Classification > TECHNOLOGY (100000) > NANOTECHNOLOGY (100700) > Nanomaterials (100708)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2013 Elsevier BV * North-Holland
Deposited On: 11 Jun 2013 01:16
Last Modified: 22 Jul 2015 04:07

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