Organic Field-Effect Transistors Utilizing Solution-Deposited Oligothiophene-Based Swivel Cruciforms
Organic Field-Effect Transistors Utilizing Solution-Deposited Oligothiophene-Based Swivel Cruciforms
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利用溶液沉积低聚噻吩旋转十字形的有机场效应晶体管
DOI：
10.1021/cm062000p
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发表时间：
2007
影响因子：
8.6
通讯作者：
L. Siebbeles
中科院分区：
文献类型：
--
作者：
Achmad Zen;P. Pingel;F. Jaiser;D. Neher;J. Grenzer;W. Zhuang;J. Rabe;A. Bilge;F. Galbrecht;B. Nehls;T. Farrell;U. Scherf;R. Abellon;and Ferdinand C. Grozema;L. Siebbeles
Two types of highly soluble oligothiophene-based swivel cruciforms are presented as semiconducting materials in OFETs. Incorporation of these penta-aryl oligomers into a swivel-cruciform type architecture greatly enhances the solubility of the oligomers, which lends itself to the fluidic preparation of thin films of the materials. XRD and AFM analysis of the resulting thin films reveals that they are highly crystalline. OFETs with pentathiophene-based swivel cruciforms exhibit a maximum field-effect mobility of 0.012 cm 2 /Vs, which is among the highest values reported to date for wet-processed OFETs utilizing oligothiophenes. In contrast, transistors made from bithiophene-phenyl-based cruciforms give overall lower mobilities, although the layers appear more crystalline in the AFM images. Pulse-radiolysis timeresolved microwave conductivity (PR-TRMC) experiments of the swivel cruciforms suggest that charge transport between crystalline domains may ultimately be the determining factor.
