Applications, photoconductors models

To model performance change of nonequilibrium devices due to Joule losses an approximate empirical relation is applicable stating that the detector temperature increase is linearly proportional to the dissipation power divided by the active electrical area of the detector. For a HgCdTe photoconductor the proportionality factor has an empirical value of 0.6 Km /W). When numerically calculating thermal... 

The quantum theory of the electronic structure of infinite, periodic macromolecules is a well-developed and venerable topic which is reviewed often (1,12) and is well-known to the audience of this NATO school. The important aspect of this topic for our present purposes is the observation that ab initio (i.e., Hartree Fock plus configuration interaction) methods are simply too expensive to apply to the description of most of the large molecules (including polymers) of biological and technological interest. In addition, they fail to provide a quantitative description of UV absorption spectra without massive configuration-interaction analysis. Consequently, for quantum chemical calculations to be helpful in the design of polymeric materials of practical use in electronic applications (e.g., photoconductors (2,5), semiconductors (5), or battery electrodes (6)), some form of semiempirical model must be developed. 

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