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The Effect of Pyrid...
The Effect of Pyridyl Nitrogen Atom Position in Pyrido-[3,4-b]pyrazines in Donor-Acceptor-pi-Acceptor Dyes on Absorption, Energy Levels, and Photovoltaic Performances of Dye-Sensitized Solar Cells
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Zhou, Ying (author)
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Li, Xing (author)
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- Li, Xin (author)
- KTH,Teoretisk kemi och biologi
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Chen, Jue (author)
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Yu, Fengtao (author)
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Hua, Jianli (author)
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(creator_code:org_t)
- 2016-01-12
- 2016
- English.
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In: ASIAN JOURNAL OF ORGANIC CHEMISTRY. - : Wiley-Blackwell. - 2193-5807. ; 5:2, s. 293-300
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- A donor-acceptor-pi-acceptor (D-A-pi-A)-type organic dye (DTN-1) incorporating a pyrido[3,4-b]pyrazine (PP) unit with the pyridyl N atom adjacent to the anchoring group has been synthesized for use in dye-sensitized solar cells (DSSCs). The maximum absorption wavelength of DTN-1 was clearly red-shifted compared with dye DT-1, based on PP unit with the pyridyl N atom adjacent to the donor group. However, this change of structure has a negative effect on photovoltaic performances, and devices made with DTN-1 only reached a power conversion efficiency of 6.10% under AM1.5G irradiation compared with 8.57% achieved by DT-1. Density functional theory calculations suggest that DTN-1 has a smaller oscillator strength, which is connected to its relatively low light-harvesting efficiency. In addition, the results of electrochemical impedance spectroscopy (EIS) reveal that charge recombination in DSSCs based on DTN-1 is more than that in the counterpart DT-1, thus leading to a lower open-circuit voltage (V-oc).
Subject headings
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Keyword
- donor-acceptor-pi-acceptor dyes
- dye-sensitized solar cells
- molecular engineering
- nitrogen
- pyrido[3
- 4-b]pyrazines
Publication and Content Type
- ref (subject category)
- art (subject category)
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