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dc.contributor.authorLu, Jianfengen_US
dc.contributor.authorLi, Haoen_US
dc.contributor.authorLiu, Shuangshuangen_US
dc.contributor.authorChang, Yu-Chengen_US
dc.contributor.authorWu, Hui-Pingen_US
dc.contributor.authorCheng, Yibingen_US
dc.contributor.authorDiau, Eric Wei-Guangen_US
dc.contributor.authorWang, Mingkuien_US
dc.date.accessioned2017-04-21T06:55:50Z-
dc.date.available2017-04-21T06:55:50Z-
dc.date.issued2016-03-07en_US
dc.identifier.issn1463-9076en_US
dc.identifier.urihttp://dx.doi.org/10.1039/c5cp05658fen_US
dc.identifier.urihttp://hdl.handle.net/11536/134002-
dc.description.abstractPorphyrins have been demonstrated as one of the most efficient sensitizers in dye-sensitized solar cells (DSSC). Herein, we investigated a series of porphyrin sensitizers functionalized with various pi-spacers, such as phenyl for LD14, thiophene for LW4, thiophene-phenyl for LW5, and 2,1,3-benzothiadiazole (BTD)-phenyl for LW24. Photo-physical investigation by means of time-resolved fluorescence and nanosecond transient absorption spectroscopy revealed an accelerated inner charge transfer in porphyrins containing the BTD-phenyl pi-spacer. Implementation of an auxiliary electron-deficient BTD unit to the porphyrin spacer also results in a broad light-harvesting ability extending up to 840 nm, contributing to an enhanced charge transfer character from the porphyrin ring to the anchoring group. When utilized as a sensitizer in DSSCs, the LW24 device achieved a power conversion efficiency of 9.2%, higher than those based on LD14 or LW5 porphyrins (PCE 9.0% or 8.2%, respectively) but lower than that of the LW4 device (PCE 9.5%). Measurements of transient photovoltage decays demonstrate that the LW24 device features the up-shifted potential band edge of the conduction band of TiO2, but involves serious charge recombination in the dye/TiO2 interface. The findings provide insights into the molecular structure and the charge-transfer characteristics for designing efficient porphyrin sensitizers for DSSC applications.en_US
dc.language.isoen_USen_US
dc.titleNovel porphyrin-preparation, characterization, and applications in solar energy conversionen_US
dc.identifier.doi10.1039/c5cp05658fen_US
dc.identifier.journalPHYSICAL CHEMISTRY CHEMICAL PHYSICSen_US
dc.citation.volume18en_US
dc.citation.issue9en_US
dc.citation.spage6885en_US
dc.citation.epage6892en_US
dc.contributor.department應用化學系zh_TW
dc.contributor.department應用化學系分子科學碩博班zh_TW
dc.contributor.departmentDepartment of Applied Chemistryen_US
dc.contributor.departmentInstitute of Molecular scienceen_US
dc.identifier.wosnumberWOS:000371139400056en_US
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