Premium
Enhanced Charge Carrier Mobility and Tailored Luminescence of n‐Type Organic Semiconductor through Block Copolymer Supramolecular Assembly
Author(s) -
Kumari Pallavi,
Khawas Koomkoom,
Bera Manas Kumar,
Hazra Sunit,
Malik Sudip,
Kuila Biplab Kumar
Publication year - 2017
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201600508
Subject(s) - copolymer , luminescence , materials science , lamella (surface anatomy) , stacking , supramolecular chemistry , polymer chemistry , pyridine , organic semiconductor , supramolecular assembly , molecule , polymer , chemical engineering , chemistry , organic chemistry , optoelectronics , composite material , engineering
Herein, a novel and viable strategy to fabricate fully solution processable nanostructured n‐type organic semiconducting material through block copolymer supramolecular assembly consisting of polystyrene‐ b ‐poly(4‐vinyl pyridine) (PS‐ b ‐P4VP) and an asymmetric perylenebisimide (PBI) has been demonstrated. The block copolymer supramolecular assemblies show hierarchical structure formation in two length scales (lamella within lamella) from synergistic phase separation of block copolymer and PBI molecule inside the comb block. The optical and luminescent studies clearly evidence that the nature of aggregation of the PBI molecules inside the P4VP domain through facial π–π stacking is modified with tailored luminescent properties compared to its pure state. The block copolymer supramolecular assembly with 1:1 mole ratio (4‐vinyl pyridine:PBI) shows almost three‐order enhancement of charge carrier mobility compared to pristine PBI though it has only (0.571) of PBI weight fraction. It is believed that the organic semiconductor polymeric system described here will be useful for preparing luminescent materials, organic electronic and optoelectronic devices.