期刊
CHEMISTRY-AN ASIAN JOURNAL
卷 5, 期 7, 页码 1566-1572出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.201000111
关键词
amphiphiles; heterojunctions; nanostructures; photoconduction; self-assembly
资金
- Chinese Academy of Sciences
- National Natural Science Foundation of China [90922019]
- Science and Technology Commission of the Shanghai Municipality [09PJ1411700]
- MEXT, Japan [21350108]
To tailor organic p/n heterojunctions with molecular-level precision, a rational design strategy using side-chain incompatibility of a covalently connected donor acceptor (D-A) dyad has been successfully carried out. An oligothiophene-perylenediimide dyad, when modified with triethylene glycol side chains at one terminus and dodecyl side chains at the other (2(Amphi)), self-assembles into nanofibers with a long-range D/A heterojunction. In contrast, when the dyad is modified with dodecyl side chains at both termini (214), ill-defined microfibers result. In steady-state measurements using microgap electrodes, a cast film of the nanofiber of 2(Amphi) displays far better photoconducting properties than that of the microfiber of 2(Lipo).. Flash-photolysis time-resolved microwave conductivity measurements, in conjunction with transient absorption spectroscopy, clearly indicate that the nanofiber of 2(Amphi) intrinsically allows for better carrier generation and transport properties than the microfibrous assembly of 2(Lipo).
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