P4VP and oligo(phenylenevinylene)‐perylenebisimide mixed donor‐acceptor supramolecular comb polymer complexes with improved charge carrier mobility. Issue 15 (28th March 2016)

• Record Type: Journal Article
• Authors: Saibal, B.; Chithiravel, S.; Asha, S. K.
• Is Part Of: Journal of polymer science. Volume 54:Issue 15(2016)
• Page Start: 2403
• Page End: 2412
• Publication Date: 2016-03-28
• Subjects: donor‐acceptor -- oligo(phenylenevinylene) -- P4VP -- perylenebisimide -- supramolecular comb polymer -- self‐assembly -- structure‐property relations -- supramolecular structures; 547
• DOI: 10.1002/pola.28115
• Languages: English
• ISSNs: 0887-624X

Abstract

ABSTRACT: Random donor‐acceptor (D‐A) supramolecular comb polymers were formed when hydroxyl functionalized donor and acceptor small molecules based on Oligo(phenylenevinylene) (namedOPVCN‐OH ) and Perylenebisimide (namedUPBI‐PDP ), respectively, were complexed with Poly(4‐vinyl pyridine) (P4VP). A series of random D‐A supramolecular comb polymers were formed by varying the ratios ofUPBI‐PDP andOPVCN‐OH with P4VP. A 100% P4VP‐donor polymer complex [P4VP(OPV1.00 )] and a 100% P4VP‐acceptor polymer complex [P4VP(UPBI1.00 )] were also synthesized and characterized. Complex formation was confirmed by FT‐IR and 1 H NMR spectroscopy. Solid state structural studies carried out using small angle X‐ray scattering and wide angle X‐ray diffraction experiments revealed altered packing of the D and A molecules in the complexes. Transmission electron microscopy images showed lamellar structures in the < 10 nm scale for theP4VP(OPV1.00 ), P4VP(UPBI1.00 ), and mixed P4VP (D‐A) complexes. The effect of the nanoscopic D‐A self‐assembly on the bulk mobility of the materials was probed using SCLC measurements. The mixed D‐A random complexes exhibited ambipolar charge transport characteristics with higher values for the average bulk hole mobility estimate.P4VP(OPV0.25 + UPBI0.75 ) exhibited an average hole mobility in the order of 10 −2 cm 2 V −1 s −1 and electron mobility 10 −5 cm 2 V −1 s −1 . © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem.2016, 54, 2403–2412 Abstract : Supramolecular comb polymer assembly involving Poly(4‐vinyl pyridine) (P4VP; template polymer) and hydroxyl functionalized Oligo(Phenylenevinylene) (donor) and Perylenebisimide (acceptor) results in lamellar organization in the domain range < 10 nm. Space charge limited current measurements shows ambipolar charge transport with highest average hole mobility in the order of 10 −2 cm 2 V −1 s −1 ( μ h, avg = 1.19 × 10 −2 cm 2 V −1 s −1 ) and electron mobility 10 −5 cm 2 V −1 s −1 .