2006 Fiscal Year Final Research Report Summary
SENSITIZERS FOR COLORFUL ZINC OXIDE DYE-SENSITIZED SOLAR CELL
| Project/Area Number |
17550172
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Organic industrial materials
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| Research Institution | Gifu University |
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Principal Investigator |
MATSUI Masaki GIFU UNIVERSITY, FACULTY OF ENGINEERING, PROFESSOR, 工学部, 教授 (60108058)
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| Co-Investigator(Kenkyū-buntansha) |
MINOURA Hideki GIFU UNIVERSITY, GRADUATE SCHOOL OF ENGINEERING, PROFESSOR, 大学院工学研究科, 教授 (40021612)
YOSHIDA Tsukasa GIFU UNIVERSITY, GRADUATE SCHOOL OF ENGINEERING, ASSOCIATE PROFESSOR, 大学院工学研究科, 助教授 (90273127)
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| Project Period (FY) |
2005 – 2006
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| Keywords | Dye-sensitized solar cell / Sensitizers / Zinc oxide / Semisquaric acids / Styryl dyes / Fluorescein / Squarylium dyes / Heptamethinecyanine dyes |
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| Research Abstract |
Application of a series of organic dyes for zinc oxide solar cells prepared by the one-step cathode deposition template method was examined. Following informations were obtained :
1) Cell performance was improved by introducing long alkyl group at the indole moiety in semisquaric acids. The incident photon-to-current efficiency (IPCE) was improved to 38.0%.
2) The addition of deoxycholic acid was effective for oxazines dyes. IPCE and solar-light-to-electricity conversion efficiency (η) were improved to 6.91 and 0.29%, respectively.
3) Among 2',4',5',7'-tetrafluoro-, -tetrachloro-, tetrabromo- (eosin Y), and -tetraiodo fluorescein derivatives, the IPCE value was in the following order : I (73%) > Cl (69%), Br (65%) > H (40%) > F (24%).
4) Carboxy group was best as an anchor group in squarylium dyes.
5) A N-Carboxyethyl indolenium derivative showed the best performance in heptamethinecyanine dyes. An Ethylcyclohexenyl derivative showed the best performance : IPCE (29%), J_<sc>(2.01 mA cm^<-2>). When dimethyl group was changed to dibuthyl group, short-circuit photocurrent density (J_<sc>) value increased to 2.30 mA cm^<-2>.
6) 3-(2-Carboxyethyl)-2-[4-(dimethylamino)styryl]benzothiazolium iodide showed the best performance as the sensitizer in flexible zinc oxide solar cell. The IPCE at around 490 nm,.J_<sc>, open-circuit photovoltage (V_<oc>), fill factor (ff), and η were observed to be 54.5 %, 6.22 mA cm^<-2>, 0.53 V, 0.59, and 1.94 %, respectively.
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