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Article: A solution-processable diketopyrrolopyrrole dye molecule with (fluoronaphthyl)thienyl endgroups for organic solar cells

TitleA solution-processable diketopyrrolopyrrole dye molecule with (fluoronaphthyl)thienyl endgroups for organic solar cells
Authors
Issue Date2014
Citation
Dyes and Pigments, 2014, v. 101, p. pp. 51-57 How to Cite?
AbstractA solution-processable dye molecule DPP(TFNa)2 that consists of diketopyrrolopyrrole (DPP) as the core and 5-(6-fluoro-2-naphthyl)thienyl as the endgroups is presented for bulk heterojunction organic solar cells. DPP(TFNa)2 is a crystalline solid with a Tm of approximately 216 °C. X-ray diffraction experiments reveal that thermal annealing increases crystallinity of the as-cast film, thus beneficial to the absorption and charge-transport properties. DPP(TFNa)2 exhibits two reversible one-electron oxidation waves at 0.87 and 1.16 V vs. Ag/AgCl reference electrode, respectively. Fitting the space-charge-limited current characteristics in a hole-only device results in a hole mobility of ∼2.7 × 10−4 cm2 V−1 s−1 at low voltages for DPP(TFNa)2. A preliminary characterization of the solar cell (ITO/PEDOT:PSS/DPP(TFNa)2:PC61BM/Al) yields a power conversion efficiency of approximately 3.0% under simulated AM 1.5G illumination (66.4 and 100 mW cm−2, respectively). The fluorine effects on material properties such as morphology, absorption, electrochemistry, charge transport and the resulting device performance are discussed.
Persistent Identifierhttp://hdl.handle.net/10722/202882

 

DC FieldValueLanguage
dc.contributor.authorZhou, R.en_US
dc.contributor.authorLi, Q. D.en_US
dc.contributor.authorLu, Sen_US
dc.contributor.authorWang, L. P.en_US
dc.contributor.authorZhang, C. H.en_US
dc.contributor.authorLi, X.en_US
dc.contributor.authorHuang, Jen_US
dc.contributor.authorChen, Pen_US
dc.contributor.authorLi, F.en_US
dc.contributor.authorZhu, X. H.en_US
dc.contributor.authorChoy, WCHen_US
dc.contributor.authorPeng, J.en_US
dc.contributor.authorCao, X.en_US
dc.contributor.authorGong, X.en_US
dc.date.accessioned2014-09-19T10:09:14Z-
dc.date.available2014-09-19T10:09:14Z-
dc.date.issued2014en_US
dc.identifier.citationDyes and Pigments, 2014, v. 101, p. pp. 51-57en_US
dc.identifier.urihttp://hdl.handle.net/10722/202882-
dc.description.abstractA solution-processable dye molecule DPP(TFNa)2 that consists of diketopyrrolopyrrole (DPP) as the core and 5-(6-fluoro-2-naphthyl)thienyl as the endgroups is presented for bulk heterojunction organic solar cells. DPP(TFNa)2 is a crystalline solid with a Tm of approximately 216 °C. X-ray diffraction experiments reveal that thermal annealing increases crystallinity of the as-cast film, thus beneficial to the absorption and charge-transport properties. DPP(TFNa)2 exhibits two reversible one-electron oxidation waves at 0.87 and 1.16 V vs. Ag/AgCl reference electrode, respectively. Fitting the space-charge-limited current characteristics in a hole-only device results in a hole mobility of ∼2.7 × 10−4 cm2 V−1 s−1 at low voltages for DPP(TFNa)2. A preliminary characterization of the solar cell (ITO/PEDOT:PSS/DPP(TFNa)2:PC61BM/Al) yields a power conversion efficiency of approximately 3.0% under simulated AM 1.5G illumination (66.4 and 100 mW cm−2, respectively). The fluorine effects on material properties such as morphology, absorption, electrochemistry, charge transport and the resulting device performance are discussed.en_US
dc.languageengen_US
dc.relation.ispartofDyes and Pigmentsen_US
dc.titleA solution-processable diketopyrrolopyrrole dye molecule with (fluoronaphthyl)thienyl endgroups for organic solar cellsen_US
dc.typeArticleen_US
dc.identifier.emailLu, S: shunmian@gmail.comen_US
dc.identifier.emailChen, P: chenping@eee.hku.hken_US
dc.identifier.emailChoy, WCH: chchoy@eee.hku.hken_US
dc.identifier.authorityChoy, WCH=rp00218en_US
dc.identifier.hkuros238578en_US
dc.identifier.volume101en_US
dc.identifier.spagepp. 51en_US
dc.identifier.epage57en_US

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