采用转移线性法分析了以PVP为栅绝缘层、以Tips-pentacene为有源层的有机薄膜晶体管(OTFT)电极与有源层间的接触电阻,其中介电层和有源层均采用旋涂法制备,银电极采用喷墨印刷法制备.沟道长度分别取200,250,300 μm和400 μm,有源层退火时间分别为2h,6h和10h,提取到的3种不同退火时间的OTFT的接触电阻分别为8 MΩ,4.5 MΩ和3 MΩ,退火10 h的OTFT的接触电阻较小主要是因为较长时间的退火使得Tips-pentacene有源层中的杂质较少,电极和有源层之间的接触势垒较小.
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