Crystalline Organic Semiconducting Thin Films Cast from a Novel Thermolytic Thiophene Oligomer

机译：新型热解噻吩低聚物浇铸的结晶有机半导体薄膜

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Here we report on OTFTs made from a novel thermoresponsive thiophene based oligomer. The functionalized oligomer is soluble in common solvents, but loses its solubility upon thermolysis. Devices with channel lengths from 5 to 40 μm were fabricated from solution then subjected to thermolysis at temperatures ranging from 150-250 ℃. The initially amorphous materials reorganize into highly crystalline films upon thermolysis. Crystallinity was characterized by x-ray diffractometry and atomic force imaging. AFM studies depicted the nucleation of molecular terraces, where the formation and overall height of terraces was observed to be dependent upon the thermolysis temperature and solvent choice. These factors correlated to overall performance. For both dip-cast and spin-cast samples, devices were fabricated at a process temperature of 180℃ with mobilities of 0.07 cm~2/Vs and on/off ratios > 10~5. The devices were relatively stable in both air and common solvents, with their mobility degrading only by ～25% upon immersion in the original casting solvents. The solubility characteristics and process temperatures for these devices may be particularly suitable for solution processing on flexible substrates.

机译：在这里，我们报道了由新型热响应噻吩基低聚物制成的OTFT。官能化的低聚物可溶于普通溶剂，但在热分解时失去其溶解性。用溶液制备通道长度为5至40μm的器件，然后在150-250℃的温度下进行热解。最初的非晶态材料在热分解后会重新组织成高度结晶的薄膜。通过X射线衍射法和原子力成像表征结晶度。 AFM研究描绘了分子平台的形核，其中平台的形成和整体高度取决于热解温度和溶剂的选择。这些因素与整体表现相关。对于浸铸和旋铸样品，器件均在180℃的工艺温度下制造，迁移率为0.07 cm〜2 / Vs，开/关比> 10〜5。该设备在空气和普通溶剂中均相对稳定，浸入原始浇铸溶剂后其迁移率仅降低约25％。这些装置的溶解度特征和处理温度可能特别适合于在柔性基板上进行溶液处理。

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《Flexible Electronics 2004 -Materials and Device Technology》|2004年|P.337-342|共6页
会议地点 San FranciscoCA(US)
作者
Paul C. Chang; Amanda R. Murphy; Josephine B. Lee; Jean M. J. Frechet; Vivek Subramanian;
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Department of Electrical Engineering Computer Sciences University of California, Berkeley;

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正文语种 eng
中图分类材料;
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Crystalline Organic Semiconducting Thin Films Cast from a Novel Thermolytic Thiophene Oligomer

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