Enhanced Charge Carrier Mobility and Tailored Luminescence of n‐Type Organic Semiconductor through Block Copolymer Supramolecular Assembly

Abstract

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.

Aligned Proton‐Conducting Graphene Sheets via Block Copolymer Supramolecular Assembly and Their Application for Highly Transparent Moisture‐Sensing Conductive Coating

“…4(e)]. Inside the graphene gallery, it is highly possible that the PSSA chains will be aligned similar to chain alignment as in the case of block copolymer microphase separation to create periodic nanostructures . The specific inter molecular hydrogen bonding of PSSA chains will also help for such assembly and alignment of PSSA chains inside the graphene gallery.…”

Polythiophene-g-poly(methacrylic acid) and perylene diimide appended peptide conjugates with tuneable photoluminescence, OMEIC, and photo-switching properties

“…[12][13][14] Here, polythiophene plays an important role owing to their intrinsic ability to be chemically tuned to insert ionic moiety, good solubility, and flexibility, which further allow them to integrate into various organic electronic and electrochemical devices. 15,16 Polythiophene-based OMEIC materials can be classified into different categories like (i) conjugated homopolymers (ii) conjugated block copolymers, and (iii) blends of conjugated polymers. 6 Poly[6-(thiophene-3-yl)hexane-1-sulfonate] tetrabutyl ammonium (PTHS) belongs to the first category (conjugated homopolymers) where charge transport occurs through a conjugated polythiophene chain and a tetrabutylammonium ion of the sulfonate group is responsible for ionic conduction.…”

Centrifugal Force-Induced Alignment in the Self-Assembly of Block Copolymers

“…Due to their capacity to form ordered nanoscale patterns, block copolymers (BCPs) have been extensively studied for their potential application as organic semiconductors, − photovoltaic materials, − and magnetic storage media , and in nanolithography. − Despite multiple efforts, the intrinsic nature of spontaneous self-assembly affords only short-range ordered BCP morphologies with a small grain size, which is a major impediment to the practical applicability of BCPs. The directed self-assembly (DSA) of BCPs has been extensively investigated to achieve long-range order or desired patterns by using a guide template based on chemical patterns (chemoepitaxy) or topographic patterns (graphoepitaxy). − …”