Projects per year
In this work, the topic of the detrimental contact effects in organic thin film transistors 1 (OTFTs) is revisited. In this case, contact effects are considered as a tool to enhance the characterization 2 procedures of OTFTs, achieving more accurate values for the fundamental parameters of the 3 transistor –threshold voltage, carrier mobility and on-off current ratio. The contact region is 4 also seen as a fundamental part of the device which is sensitive to physical, chemical and 5 fabrication variables. A compact model for OTFTs, which includes the effects of the contacts, 6 and a recent proposal of an associated evolutionary parameter extraction procedure, are reviewed. 7 Both the model and the procedure are used to assess the effect of the annealing temperature on 8 a nickel-1,4,8,11,15,18,22,25-octakis(hexyl)phthalocyanine (NiPc6) based OTFT. A review of the 9 importance of phthalocyanines in organic electronics is also provided. The characterization of the 10 contact region in NiPc6 OTFTs complements the results extracted from other physical-chemical 11 techniques such as differential scanning calorimetry or atomic force microscopy, in which the 12 transition from crystal to columnar mesophase imposes a limit for the optimum performance of the 13 annealed OTFTs.
- 1 Finished