Semiconductors Poly

Stevens MA, Silva C, Russell DM, Friend RH (2001) Exciton dissociation mechanisms in the polymeric semiconductors poly(9,9-dioctylfluorene) and poly(9,9-dioctylfluorene-co-benzothiadiazole). Phys Rev B 6316(16) 165213... 

The impact of molecular weight on microstmcture and charge transport in semicrystaUine polymer semiconductors—poly(3-hexylthiophene), a model study 13PPS1978. 

Solution-process able regioregular semiconductors, poly(2,5-bis(3-dodecylthien-2-yl)-3,6-dimethylthieno[3,2-b]thiophene) (102) and poly(2,5-bis(3 -dodecyl-... 

The most commonly used and studied is the p-type semiconductor poly 3-hexylthiophene (P3HT) polymer that has a unique property of self-organization of molecules. Optimising the choice of solvent has also been proved to be a tedious work and thus, many studies have been conducted on the same. Experiments were conducted by Sirringhaus et al. [43] on a hydrophobic substrate and a 70-100 nm thick polymer film was spin-coated and also drop casted at 2000 rpm. It was observed that the amount of charge mobility was more in the case of drop casted... 

The cadmium chalcogenide semiconductors (qv) have found numerous appHcations ranging from rectifiers to photoconductive detectors in smoke alarms. Many Cd compounds, eg, sulfide, tungstate, selenide, teUuride, and oxide, are used as phosphors in luminescent screens and scintiUation counters. Glass colored with cadmium sulfoselenides is used as a color filter in spectroscopy and has recently attracted attention as a third-order, nonlinear optical switching material (see Nonlinear optical materials). DiaLkylcadmium compounds are polymerization catalysts for production of poly(vinyl chloride) (PVC), poly(vinyl acetate) (PVA), and poly(methyl methacrylate) (PMMA). Mixed with TiCl, they catalyze the polymerization of ethylene and propylene. 

Commercially available PV systems most often include modules made from single-crystal or poly-ciystalline silicon or from thin layers of amoiphous (non-crystalline) silicon. The thin-filni modules use considerably less semiconductor material but have lower efficiencies for converting sunlight to direct-current electricity. Cells and modules made from other thin-filni PV materials such as coppcr-indiuni-diselenide and cadmium telluride are under active development and are beginning to enter the market. 

Poly(arylene vinylene)s — Synthesis and Applications in Semiconductor Devices... 

Several attempts to use otganic polymeric semiconductors as the active component in photovoltaic devices have been reported during the last two decades. Interest in the photovoltaic properties of conjugated polymers like polyacelylcne, various derivatives of polythiophenes and poly(para-phenylene vinylene)s arose from... 

Bearing in mind the semiconductive properties of PCSs one might expect that these substances, being p-type semiconductors in air, possess photosensitizing activity. We, indeed, have demonstrated40 that PCSs, such as poly(schiff base)s, salts of poly(propynoic acid), or polyquinoline, are active photosensitizers of... 

The catalytic activity of PCSs results from their semiconductor properties. The first studies in this field date from 1959—1961. Thus, we have demonstrated catalytic activity of products of the thermal transformation of PAN in the decomposition reactions of hydrogen peroxide, hydrazine hydrate, and formic acid270, 271. There is an indication of catalytic activity of poly(aminoquinone) in the reactions of the hydrogen peroxide decomposition272. ... 

Many problems must be solved before practical, reliable, and cost-effective diamond semiconductor devices become available. Yet, the prospects are good, particularly if epitaxial single-crystal or highly oriented poly crystalline diamond can be effectively produced by CVD.P5]... 

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