Novel extended π-conjugated Zn(II)-porphyrin derivatives bearing pendant triphenylamine moiety for dye-sensitized solar cell: synthesis and characterization

Title
Novel extended π-conjugated Zn(II)-porphyrin derivatives bearing pendant triphenylamine moiety for dye-sensitized solar cell: synthesis and characterization
Authors
강민수오재범서강덕김환규박지희김경곤박남규
Keywords
Zn(II)-porphyrin; dye-sensitized solar cell; electron-donating group; electron-accepting group; power conversion efficiency; cyclic voltammetry
Issue Date
2009-07
Publisher
Journal of porphyrins and phthalocyanines
Citation
VOL 13, NO 7, 798-804
Abstract
We have designed and synthesized novel Zn(II)-porphyrin derivatives for dye-sensitized solar cells. The derivatives incorporate the electron-donating group of a pendant triphenylamine into cyano-substituted ([TPA]Zn-Por-CN1) or non-substituted stilbene moiety ([TPA]Zn-Por1) in the 5,10,15- meso-position and carboxylic acid group in the 20-meso-position in a porphyrin derivative. Their chemical structures were characterized by 1H NMR, FT-IR, UV-vis absorption, EI-mass, and MALDI-TOF mass spectroscopies. Their electrochemical properties were studied by cyclic voltammetry measurement. These Zn(II)-porphyrin derivatives have been used to fabricate dye-sensitized solar cells based on I-/I2 liquid electrolytes as dye sensitizers and their device performances were evaluated by comparing with that of a standard Ru(II) complex dye. [TPA]Zn-Por-CN1 showed higher power conversion effi ciency than that of [TPA]Zn-Por1, due to a broader absorption band around 435 nm. Short-circuit photocurrent density (Jsc), open-circuit voltage (Voc), fi ll factor (FF), and power conversion effi ciency (η) of DSSC for [TPA]Zn-Por-CN1 were evaluated to be Jsc = 6.3 mA.cm-2, Voc = 0.737 V, FF = 0.683, and η = 3.1%, respectively.
URI
http://pubs.kist.re.kr/handle/201004/35940
ISSN
1088-4246
Appears in Collections:
KIST Publication > Article
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