Organic semiconductor detectors

Organic semiconductor detectors. Adsorbed gases have a marked effect on the electrical conductivity of organic semiconductors... 

Advances in the capabilities of NEXAFS spectroscopy and its impact on organic semiconductor analysis will most likely result from innovations in detector design... 

Organic Semiconductor-Based Light Soiu ces and Detectors... 

Fig. 4.9. Schematic of device structure of typical organic semiconductor-based light sources and detectors...

Sn, 1 1 Eu, 1 1 Dy and i Tm. Second, scintillation detectors may be considered. Thin organic (crystal or plastic) scintillators are used for detecting electrons. Gas scintillation proportional counters with a good energy resolution (e.g. R 8% at 6 keV) may also be constructed for CEMS as well as semiconductor detectors. 

Now that these organic/inorganic heterostructure semiconductors can be made, we can use them to increase the range of potentially harmful materials that can be detected in time to prevent a dangerous incident. I ll briefly discuss the applications of these semiconductor materials to national security needs, including devices such as infrared (IR) detectors and sources, gamma-ray detectors, and chemical/biological sensors. 

The performance of current systems is restricted by several factors. First of all, high-quality detector depends on complex materials and processes, which are very difficult and/or costly to be integrated in a convention semiconductor process. Secondly, the inherent paralleling processing potential is poorly utilized. For example, although the photon detector cells are organized as a 2-D array, each column of... 

While much of the surveyed research exhibits promising vapor-phase sensing performance, many of the technologies remain experimental and bound to a laboratory setting. Most of the commercial gas sensors available today utilize older, more mature technologies such as electrochemical cells, catalytic beads, photoionization detectors (PID), SAW, metal oxide semiconductors (MOS), and QCM. The dearth of viable organic solid-state vapor-phase chemosensors indicates that there is much work still to be done (in terms of material stability, selectivity, etc.) before commercialization becomes commonplace for organic sensors. 

The first organic electronic products reached the market in 2005/2006. This included passive identification (ID) cards that could be mass printed on paper, which were used for ticketing or toys, became available in 2006. Similarly, flexible batteries, produced in a reel-to-reel process, have been used for smart cards and other mobile consumer products for some time. Printed strain sensors and the first printed semiconductor photo detector arrays for industrial, medical and security applications are also on the market. 

---