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|Title:||Theoretical studies on model Type II staggered conducting superlattices|
Bakhshi, A K
Density of states
|Abstract:||Quasi-one-dimensional model diblock and triblock polymeric superlattices belonging to Type II- staggered have been investigated using Dean’s negative factor counting method in tight binding approximation. For each system, the trends in electronic properties i.e., IP, EA and band gap, have been studied as a function of block size, composition, arrangement of blocks and type of polymer chain (periodic or aperiodic). The trends for triblock systems obtained have been compared with the corresponding trends for diblock copolymers. Increasing the block size of all the components is found to result in copolymers with band gap lower than that of the homopolymers. The electronic properties are found to lie intermediate of the electronic properties of the three components. The DOS curves of periodic copolymers consist of sharp peaks while those of aperiodic copolymers consist of broad regions of allowed energy states with fewer gaps in between.|
|Appears in Collections:||IJC-A Vol.49A(02) [February 2010]|
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