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Title: Electronic density of states and conduction properties of Type-II staggered copolymers of thiophene based donor-acceptor polymers
Authors: Kumar, Amit
Bakhshi, A K
Issue Date: Feb-2006
Publisher: NISCAIR-CSIR, India
Abstract: Using the ab initio band structure results of three thiophene based donor-acceptor polymers, PHTH (A)x, PFTH (B)x and PCNTH (C)x, the electronic density of states of their various periodic and aperiodic copolymers (Am Bn)x, (AmCn) x and (BmCn), belonging to the class of Type-II staggered have been determined in tight binding approximation. The unit cell of these donor acceptor polymers consists of bicyclopentadithiophene unit bridged by an electron accepting group >C=CH2 in PHTH (A)x, >C=CF2 in PFTH (B)x and >C=C(CN)2 in PCNTH (C)x. The trends obtained in the electronic structures and conduction properties of these copolymers as a function of block size, composition and the arrangement of blocks in the copolymer chains are discussed. The results are important guidelines for designing novel polymers with desired conduction properties.
Page(s): 352-357
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections: IJC-A Vol.45A(02) [February 2006]

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