Polysilylenes electronic transport

In this chapter, a selective overview of technological and historical background is followed by a general discussion of the microscopic details of the transport phenomenon and experimental techniques. Key results of earlier studies on carbon-based systems are presented and then compared with corresponding data on poly(methylphenylsilylene) (PMPS), which has been taken as the prototype for studies of transport system in polymers with silicon backbones. Key points are then summarized. Those wishing to omit the extensive background section may proceed directly to the section on electronic transport in polysilylenes (page 492). 

The experimental features of electronic transport in polysilylenes to be described later are best understood when contrasted with results of earlier studies in random organic media, key examples of which are highlighted in the following sections. 

Effect of Thermally Induced Transitions on Electronic Transport in Aliphatic Polysilylenes... 

Electronic transport of photoinjected holes, polysilylenes, fixed-electiic fields, mobility temperature correlations, transport behavior, bathochromic shifts, polymer conformational changes. 61... 

Transport measurements in PMPS reveal (49, 50) a behavior that is qualitatively similar in all important respects to that in PVK and MDPs. Does this similarity then imply a role (as hopping sites) for the 7r-electron-containing pendant groups on the saturated Si chain, which is analogous to the role played by carbazole on the saturated carbon backbone in PVK In this connection, we have not been able to observe hole transport in polystyrene, the phenyl-pendant-containing carbon-backbone system most analogous to PMPS, but more compelling and more direct evidence to support another interpretation of the transport mechanism in polysilylenes exists. 

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