Solution processable lutetium phthalocyanine organic field-effect transistors
Solution processable lutetium phthalocyanine organic field-effect transistors
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DOI：
10.1016/j.orgel.2009.11.023
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发表时间：
2010-03
影响因子：
3.2
通讯作者：
N. Chaure;J. L. Sosa-Sánchez;A. Cammidge;M. Cook;A. Ray
中科院分区：
文献类型：
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作者：
N. Chaure;J. L. Sosa-Sánchez;A. Cammidge;M. Cook;A. Ray
用16个辛基取代的新型热致液晶双酞菁化合物夹心络合物作为有源有机半导体层，制备了有机场效应晶体管(OFET)。当器件在70℃的真空下进行退火时，在饱和区域的场效应迁移率增加了5倍，而阈值电压降低到了原始膜的一半。退火后器件的通断比增加了两个数量级。在晶相向中间相转变温度以上热处理的OFETs的性能改善与原子力显微镜图像一致，表明有机双酞菁薄膜的颗粒尺寸增加，平均表面粗糙度降低。
Spun films of a novel thermotropic liquid crystalline lutetium bisphthalocyanine sandwich complexes substituted with sixteen octyl chains are employed as active organic semiconducting layers in the fabrication of organic field-effect transistors (OFET). When the device is annealed under vacuum at 70°C, an increase in the field effect mobility in the saturated regime by a factor of five is observed while the threshold voltage is reduced to half the value obtained for as-deposited films. The annealed devices exhibit an increase in on/off ratio by two orders of magnitude. An improvement in performance of OFETs annealed above the crystal to mesophase transition temperature is consistent with atomic force microscopic images indicating increases in grain sizes and decreases in mean surface roughness of the organic bisphthalocyanine films.