共 48 条
Selective Dye Loading at the Heterojunction in Polymer/Fullerene Solar Cells
被引:206
作者:

Honda, Satoshi
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机构:
Kyoto Univ, Grad Sch Engn, Dept Polymer Chem, Nishikyo Ku, Kyoto 6158510, Japan Kyoto Univ, Grad Sch Engn, Dept Polymer Chem, Nishikyo Ku, Kyoto 6158510, Japan

Ohkita, Hideo
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机构:
Kyoto Univ, Grad Sch Engn, Dept Polymer Chem, Nishikyo Ku, Kyoto 6158510, Japan
Japan Sci & Technol Agcy JST, PRESTO, Kawaguchi, Saitama 3320012, Japan Kyoto Univ, Grad Sch Engn, Dept Polymer Chem, Nishikyo Ku, Kyoto 6158510, Japan

Benten, Hiroaki
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Kyoto Univ, Grad Sch Engn, Dept Polymer Chem, Nishikyo Ku, Kyoto 6158510, Japan Kyoto Univ, Grad Sch Engn, Dept Polymer Chem, Nishikyo Ku, Kyoto 6158510, Japan

Ito, Shinzaburo
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Kyoto Univ, Grad Sch Engn, Dept Polymer Chem, Nishikyo Ku, Kyoto 6158510, Japan Kyoto Univ, Grad Sch Engn, Dept Polymer Chem, Nishikyo Ku, Kyoto 6158510, Japan
机构:
[1] Kyoto Univ, Grad Sch Engn, Dept Polymer Chem, Nishikyo Ku, Kyoto 6158510, Japan
[2] Japan Sci & Technol Agcy JST, PRESTO, Kawaguchi, Saitama 3320012, Japan
关键词:
POLYMER BLENDS;
ENERGY-TRANSFER;
FILM STRUCTURES;
MORPHOLOGY;
EFFICIENCY;
POLYCARBONATE;
ORGANIZATION;
D O I:
10.1002/aenm.201100094
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
Selective dye loading at the polymer/fullerene interface was studied for ternary blend bulk heterojunction solar cells, consisting of regioregular poly(3-hexylthiophene) (RR-P3HT), a fullerene derivative (PCBM), and a silicon phthalocyanine derivative (SiPc) as a light-harvesting dye. The photo-current density and power conversion efficiency of the ternary blend solar cells were most improved by loading SiPc with a content of 4.8 wt%. The absorption and surface energy measurements suggested that SiPc is located in the disordered P3HT domains at the RR-P3HT/PCBM interface rather than in the PCBM and crystal P3HT domains. From the peak wavelength of SiPc absorption, the local concentration of SiPc ([SiPc](Local)) was estimated for the RR-P3HT: PCBM: SiPc ternary blends. Even for amorphous films of regiorandom P3HT (RRa-P3HT) blended with PCBM and SiPc, [SiPc](Local) was higher than the original content, suggesting dye segregation into the RRa-P3HT/PCBM interface. For RR-P3HT: PCBM: SiPc blends, [SiPc](Local) increased with the increase in the P3HT crystallinity. Such interfacial segregation of dye molecules in ternary blend films can be rationally explained in terms of the surface energy of each component and the crystallization of P3HT being enhanced by annealing. Notably, the solvent annealing effectively segregated dye molecules into the interface without the formation of PCBM clusters.
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页码:588 / 598
页数:11
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