制备了基于F16CuPc和CuPc的双异质结结构的双极型有机薄膜晶体管.该器件的载流子迁移率是相同工艺制备的F16CuPc和CuPc双层单异质结有机薄膜晶体管器件的4~5倍.同时,该双异质结结构还能调整载流子的阈值电压,减少双层结构对薄膜厚度等工艺条件的苛刻要求.这种双异质结结构为提升双极型有机薄膜晶体管器件的性能提供了一种有效方法.

Ambipolar organic thin film transistors (OTFTs) based on copper hexadecafluorophthalocyanine (F16CuPc) and copper phthalocyanine (CuPc) with double heterojunction were fabricated.The carrier mobility was 4-5 times enhanced compared with that of double layer-architecture devices under the same process.The double heterojunction effect was attributed to the great enhancement which showed an effective way to promote the performance of ambipolar OTFTs.The double heterojunction architecture also provided another way to adjust the carrier threshold voltage and decrease the critical dependence of the film thicknesses in double layer architecture.