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Restrain recombination by spraying pyrolysis TiO2 on NiO film for quinoxaline-based p-type dye-sensitized solar cells
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2017 (English)In: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. 490, p. 380-390Article in journal (Refereed) Published
Abstract [en]

In this work, we reported two new quinoxaline-based sensitizers (BQI and BQII) for p-type dye-sensitized solar cells (p-DSSCs) featuring carboxylic acid and pyridine as anchoring groups, respectively, in combination with triphenylamine donor. The optical, electrochemical and photovoltaic properties of BQI and BQII were investigated. Results showed that BQI-based p-DSSC with carboxylic acid anchoring group obtained higher photoelectric conversion efficiency (PCE) of 0.140%. To further optimize the device performance, we added a layer of TiO2 on the surface of NiO film as a barrier layer, which contributed to the improvement of the photocurrent density from 3.00 to 3.84 mA cm−2. The p-DSSCs based on BQI reached the PCE of 0.20% at an irradiance of 100 mW cm−2 simulated AM1.5 sunlight. Electrochemical impedance spectroscopy (EIS) analysis indicated that the hole recombination resistance of p-DSSCs with TiO2 barrier layer was larger than that of the naked NiO film. Meanwhile, the surface profile of TiO2 on NiO film was verified by scanning electron microscope (SEM), X-ray diffraction (XRD) and the time of flight-secondary ion mass spectrometry (TOF-SIMS).

Place, publisher, year, edition, pages
Academic Press, 2017. Vol. 490, p. 380-390
Keywords [en]
p-type DSSCs, Quinoxaline, Sensitizer, TiO2 barrier layer
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-200870DOI: 10.1016/j.jcis.2016.11.037ISI: 000393148300044Scopus ID: 2-s2.0-84999143755OAI: oai:DiVA.org:kth-200870DiVA, id: diva2:1072071
Note

QC 20170207

Available from: 2017-02-07 Created: 2017-02-03 Last updated: 2017-11-29Bibliographically approved

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Applied Physical ChemistryCentre of Molecular Devices, CMD
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