کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1265194 | 972199 | 2009 | 8 صفحه PDF | دانلود رایگان |
The presence of impurities in organic semiconductors is an important limitation for the performance of related devices. Here, we investigate with density-functional theory calculations the effect of water and oxygen-related species on the properties of the prototype system of rubrene, the current record-holder organic semiconductor in terms of carrier mobilities. We identify the most stable impurity structures, with species in either substitutional or interstitial configurations, and we analyze their complex role in changing the shape and profile of rubrene energy bands. In certain cases the impurities either give rise or help annihilate carrier traps, and we discuss the relevance of our findings for the optimization of rubrene-based electronic systems.
Journal: Organic Electronics - Volume 10, Issue 2, April 2009, Pages 333–340