02592nas a2200205   4500008004100000022001400041245011800055210006900173260000900242520181500251653002502066653003602091653001902127653002702146653002002173100002102193700002102214700002402235856012702259       2024                        eng d  a1022-135200aVariations in packing as a function of side chains in random copolymers and its impact on charge carrier mobility0 aVariations in packing as a function of side chains in random cop  cOCT 3 a<p>
	Homopolymers and alternating copolymers of conjugated molecules exhibit impressive performance in electronic devices. Despite the well-established procedures, the synthesis of alternating copolymers using three monomers is not as easy as random copolymers. Besides facile synthesis, the random copolymers can match the performance of alternating copolymers in electronic devices. Herein, random copolymers are designed and synthesized comprising thienoisoindigo (TIIG), diketopyrrolopyrrole (DPP), and thiophene. The DPP monomers installed with various side chains including branched alkyl chain, branched alkyl chain with ester functionality, linear oligo ethylene glycol, and siloxane terminated alkyl chain are incorporated into the polymers (P1, P2, P3, and P4, respectively). All the thermally stable, low bandgap random copolymers exhibited strong H-type aggregation in thin film. The relationship between thin film microstructure originating from diverse side chains and the charge transport in organic field effect transistors (OFETs) is investigated. All the random copolymers exhibited predominantly p-type charge transport and a maximum hole mobility of 2 x 10-2 cm2 V-1s-1 is observed for P3. The packing of all the polymers is examined theoretically by density functional theory (DFT) and compared with experimental values obtained from grazing incident X-ray diffraction (GIXRD). Various side chains (hydrophilic and hydrophobic) affect molecular packing of random polymers which ultimately affects its thin film morphology and semiconducting performances. Linear chains provide better interchain packing by pi-pi stacking compared to bulky branched side chains. The incorporation of heteroatoms and polar groups into the side chain further enhances the interchain interactions. image</p>
10adiketopyrrolopyrrole10aorganic field effect transistor10arandom polymer10aside chain engineering10athienoisoindigo1 aSwain, Gitanjali1 aKumar, Subramani1 aSamudre, Nikhil, S.  uhttps://library.ncl.res.in/content/variations-packing-function-side-chains-random-copolymers-and-its-impact-charge-carrier