The Organic Thin Films Transistors(OTFTs) with the ratio of channel width to length as 6 000/10 were fabricated.The copper phthalocyanine and silicon dioxide were used as the active layer and the insulating layer,respectively,and titanium/aurum were made as the electrode for the prepared OTFTs.The effect of the circumstance on the device was analyzed by comparing its electrical properties when it was in the air for different periods.The results show that when the device is in the air,its carrier concentrati...