Polymer devices functions

Novel Devices and Novel Functions in Thin-Film Polymer Devices. 18... 

Section 1.2 gives a brief review of conjugated polymers in semiconducting and metallic phases. Section 1.3 discusses device architectures and their corresponding processes. Section 1.4 introduces some novel devices and their functions in thin-film polymer devices. Section 1.5 is devoted to technical merits of SMOLEDs and PLEDs used as emitter elements in flat-panel displays. 

NOVEL DEVICES AND NOVEL FUNCTIONS IN THIN-FILM POLYMER DEVICES... 

Dual-Function Polymer Device and Display Matrices... 

G Yu, C Zhang, and AJ Heeger, Dual-function semiconducting polymer devices light-emitting and photodetecting diodes, Appl. Phys. Lett., 64 1540-1542, 1994. 

Finally, for practical reasons it is useful to classify polymeric materials according to where and how they are employed. A common subdivision is that into structural polymers and functional polymers. Structural polymers are characterized by - and are used because of - their good mechanical, thermal, and chemical properties. Hence, they are primarily used as construction materials in addition to or in place of metals, ceramics, or wood in applications like plastics, fibers, films, elastomers, foams, paints, and adhesives. Functional polymers, in contrast, have completely different property profiles, for example, special electrical, optical, or biological properties. They can assume specific chemical or physical functions in devices for microelectronic, biomedical applications, analytics, synthesis, cosmetics, or hygiene. 

These materials may also be included in guest-host or side-chain polymer systems, similar to those exploited in electro-optic polymer studies. This would improve processability for waveguide devices. The coefficients quoted above show that such a doped polymer could function at reasonable power levels and waveguide dimensions with an active region 1-2 mm long. 

Here 4> is the work function of the metal and x is the electron affinity of the insulator. Table 3.3 shows that N0 is very sensitive to the values of 0 - x - In the organic polymer devices the injecting contact is made as nearly ohmic as possible and — x is small. In computation of the I-V relations 0 — X is assumed to be zero. In this case the value of No is very large and can be taken as infinity [37,38],... 

It is vital that simple and cheap synthesis of interlocked polymers is achieved in order to make progress in the chemistry of polyrotaxanes and polycatenanes. Since bulk property is essential in polymer science, difficulty in synthesis of interlocked polymers should be avoided, this being different from the case of molecular materials such as molecular devices functioning at a molecular level. Both polyrotaxanes and polycatenanes as well as both rotaxanes and catenanes are becoming easy to synthesize with the progress... 

Figure 15-14. (a) Energy diagram of a metal l/semiconductor/metal 2 Schottky barrier under open circuit conditions, whereby the metals have different work-functions (j) work-function, /j electron affinity, IP ionization potential band gap, IF depletion width), (b) Charge generation process in single layer conjugated polymer device under short circuit conditions in the MIM model, VB valence... 

Bhattacharyya S, Kymakis E, Amaratunga GAJ (2004) Photovoltaic properties of dye functionalized single-wall carbon nanotube/conjugated polymer devices. Chem Mater 16 4819... 

One-dimensional nanostructured polymer composite materials include nanowires, nanorods, nanotubes, nanobelts, and nanoribbons. Compared to the other three dimensions, the first characteristic of one-dimensional nanostructure is its smaller dimension structure and high aspect ratio, which could efficiently transport electrical carriers along one controllable direction, thus is highly suitable for moving charges in integrated nanoscale systems (Tran et al., 2009). The second characteristic of one-dimensional nanostructure is its device function, which can be exploited as device elements in many kinds of nanodevices. With a rational synthetic design, nanostructures with different diameters/... 

The v cal integrated polymer device fabricated was a vartically stacked ED-polymer directional coupler (27). The nonlinear optical matmal used was a bisazo-dye functionalized EO polymer, 3RDCVXY. A standard REB process was used to fabricate the hybrid waveguides. Using die vertically stacked directional coupler, optical coupling similar to that of in-plane directional coupler was attained. 

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