Field-effect transistors based on self-organized molecular nanostripes

被引:107
作者
Cavallini, M
Stoliar, P
Moulin, JF
Surin, M
Leclère, P
Lazzaroni, R
Breiby, DW
Andreasen, JW
Nielsen, MM
Sonar, P
Grimsdale, AC
Mullen, K
Biscarini, F
机构
[1] CNR, Inst Study Nanostruct Mat, Div Res, I-40129 Bologna, Italy
[2] Univ Mons, Serv Chim Mat Nouveaux, B-7000 Mons, Belgium
[3] Riso Natl Lab, Danish Polymer Ctr, DK-4000 Roskilde, Denmark
[4] Max Planck Inst Polymer Res, D-55128 Mainz, Germany
关键词
D O I
10.1021/nl051685+
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Charge transport properties in organic semiconductors depend strongly on molecular order. Here we demonstrate field-effect transistors where drain current flows through a precisely defined array of nanostripes made of crystalline and highly ordered molecules. The molecular stripes are fabricated across the channel of the transistor by a stamp-assisted deposition of the molecular semiconductors from a solution. As the solvent evaporates, the capillary forces drive the solution to form menisci under the stamp protrusions. The solute precipitates only in the regions where the solution is confined by the menisci once the critical concentration is reached and self-organizes into molecularly ordered stripes 100-200 nm wide and a few monolayers high. The charge mobility measured along the stripes is 2 orders of magnitude larger than the values measured for spin-coated thin films.
引用
收藏
页码:2422 / 2425
页数:4
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