Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 22, Issue 7, Pages 1454-1460Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201101787
Keywords
conducting polymer anodes; inverted solar cell structures; bulk heterojunctions; solar cells; dye-sensitized titania; transfer printing
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Funding
- Royal Society Brian Mercer Bequest
- Engineering and Physical Sciences Research Council [EP/E045472, EP/F061757/1]
- Lee-Lucas Endowment
- Spanish Ministry of Science and Innovation [MAT2009-10642]
- Engineering and Physical Sciences Research Council [EP/F061757/1] Funding Source: researchfish
- EPSRC [EP/F061757/1] Funding Source: UKRI
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The use of vapor phase polymerized poly(3,4-ethylenedioxythiophene) (VPP-PEDOT) as a metal-replacement top anode for inverted solar cells is reported. Devices with both i) standard bulk heterojunction blends of poly(3-hexylthiophene) (P3HT) donor and 1-(3-methoxycarbonyl)-propyl-1-phenyl-(6,6)C60 (PCBM) soluble fullerene acceptor and ii) hybrid inorganic/organic TiO2/P3HT acceptor/donor active layers are studied. Stamp transfer printing methods are used to deposit both the VPP-PEDOT top anode and a work function enhancing PEDOT:polystyrenesulphonate (PEDOT:PSS) interlayer. The metal-free devices perform comparably to conventional devices with an evaporated metal top anode, yielding power conversion efficiencies of 3% for bulk heterojunction blend and 0.6% for organic/inorganic hybrid structures. These encouraging results suggest that stamp transfer printed VPP-PEDOT provides a useful addition to the electrode materials tool-box available for low temperature and non-vacuum solar cell fabrication.
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