| Physical and Electrochemical Analysis of an Indoor-Outdoor Ageing Test of Large-Area Dye Solar Cell Devices. | |
MedLine Citation:
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PMID: 22890835 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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A long-term life test (3200 h) on large-area dye-sensitized cells is performed both under outdoor conditions, in the sunny Mediterranean climate in Rome (Italy), and under continuous light soaking (1 Sun, 85 °C). Different degradation rates are investigated for the outdoor samples with horizontally and vertically oriented cells (azimuth South, tilt angle 25°). Thirty identical photocells (active area=3.6 cm(2) , conversion efficiencies=(4.8±0.2) %) are aged using a robust master-plate configuration. After the first 1000 h of testing in open-circuit conditions, some of the test samples are set near the maximum power point (MPP) and the life test continued further until 3200 h. A detailed analysis of the physical parameters obtained by electrochemical impedance is given together with electrolyte transmittance variation with time as a function of the ageing conditions. Faster degradation in devices working at the MPP is observed, due mainly to a progressive decrease of the triiodide concentration in the electrolyte and a likely alteration at the titania/electrolyte interface. Outdoor devices working with vertically oriented cells show clearly that the orientation of long-striped cells can affect the lifetime. The aged cells suffer an increase of recombination rate, change in the chemical capacitance, and positive shift of the titania conduction band level. A strong correlation between the increase of the electrolyte diffusion resistance and degradation phenomena is found. |
Authors:
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Simone Mastroianni; Alessandro Lanuti; Stefano Penna; Andrea Reale; Thomas M Brown; Aldo Di Carlo; Franco Decker |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-8-13 |
Journal Detail:
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Title: Chemphyschem : a European journal of chemical physics and physical chemistry Volume: - ISSN: 1439-7641 ISO Abbreviation: Chemphyschem Publication Date: 2012 Aug |
Date Detail:
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Created Date: 2012-8-14 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100954211 Medline TA: Chemphyschem Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. |
Affiliation:
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CHOSE-Centre for Hybrid and Organic Solar Energy, Department of Electronic Engineering, University of Rome Tor Vergata viale Politecnico 1, 00133 Rome (Italy). |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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