کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5370476 | 1388499 | 2005 | 7 صفحه PDF | دانلود رایگان |
The long-term stability of pentacene thin-film transistors (TFTs) encapsulated with a transparent SnO2 thin-film prepared by ion beam-assisted deposition (IBAD) was investigated. After encapsulation process, our organic thin-film transistors (OTFTs) showed somewhat degraded field-effect mobility of 0.5Â cm2/(VÂ s) that was initially 0.62Â cm2/(VÂ s), when a buffer layer of thermally evaporated 100Â nm SnO2 film had been deposited prior to IBAD process. However, the mobility was surprisingly sustained up to 1 month and then gradually degraded down to 0.35Â cm2/(VÂ s) which was still three times higher than that of the OTFT without any encapsulation layer after 100 days in air ambient. The encapsulated OTFTs also exhibited superior on/off current ratio of over 105 to that of the unprotected devices (â¼104) which was reduced from â¼106 before aging. Therefore, the enhanced long-term stability of our encapsulated OTFTs should be attributed to well protection of permeation of H2O and O2 into the devices by the IBAD SnO2 thin-film which could be used as an effective inorganic gas barrier for transparent organic electronic devices.
Journal: Applied Surface Science - Volume 252, Issue 5, 15 December 2005, Pages 1332-1338