Organic semiconductors, advantages

It was aheady mentioned that one of the major advantages for the application of organic semiconductors in spintronics applications is the large spin diffusion length even at room temperature. While most of the spintronics experiments published up to now are performed at very low temperature, it is assumed that applying organics makes this effort non-essential. For this reason SQUID measurements were also carried out at room temperature in order to check if the magnetic behaviour of the contacts still allows spinFET operation. 

The most commonly reported organic semiconductor material is phthalocyanine (Pc), although many embodiments of this material are technically classified as polymers and will not be discussed in this chapter. One sensor of this type is a p-type semiconductor sensitive to CI2 and NO2 at a 150 °C operating temperature, and has the advantage of very low sensitivity to H2, H2S, NH3, CH4, SO2, and CO [20]. Mg, Co, Ni, Cu, or Zn phthalocyanine films have also demonstrated some sensitivity to NO2 [28]. In another study, lead phthalocyanine (PbPc) was configured as an n-type semiconductor when doped with RUO2 and Pd and was shown to be sensitive to H2 and CO gases [21]. 

NEXAFS spectroscopy holds several key advantages for investigating organic semiconductor thin him microstructure. Most importantly, it is highly sensitive to K-... 

Material can also be evaporated from crucibles, which is in many ways the same process as that used for boat evaporation. The major difference is that the crucible (which can be ceramic, quartz, graphite, glass, or metal) is indirectly heated by a resistive heater. This has some advantages, especially for the deposition of organic semiconductors, but can also be used to deposit many metals and some insulator and optical materials. 

The ability to purify and crystallize material using this class of techniques and readily available equipment is an advantage of small molecule organic semiconductors over polymeric materials. 

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