A general mechanism for controlling thin film structures in all-conjugated block copolymer: fullerene blends

被引：15

作者：

Dattani, Rajeev ^{[1
,2
]}

Bannock, James H. ^{[1
,3
]}

Fei, Zhuping ^{[1
,3
]}

MacKenzie, Roderick C. I. ^{[4
]}

Guilbert, Anne A. Y. ^{[1
,2
]}

Vezie, Michelle S. ^{[5
]}

Nelson, Jenny ^{[1
,5
]}

de Mello, John C. ^{[1
,3
]}

Heeney, Martin ^{[1
,3
]}

Cabral, Joao T. ^{[1
,2
]}

Nedoma, Alisyn J. ^{[1
,2
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Ctr Plast Elect, London SW7 2AZ, England

[2] Univ London Imperial Coll Sci Technol & Med, Dept Chem Engn, London SW7 2AZ, England

[3] Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AZ, England

[4] Univ Nottingham, Fac Engn, Nottingham NG7 2RD, England

[5] Univ London Imperial Coll Sci Technol & Med, Dept Phys, London SW7 2AZ, England

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2014年 / 2卷 / 35期

基金：

英国工程与自然科学研究理事会;

关键词：

CRYSTALLIZATION; EFFICIENCY; POLYTHIOPHENE; PHOTOVOLTAICS; MORPHOLOGY;

D O I：

10.1039/c4ta03146f

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Block copolymers have the potential to self-assemble into thermodynamically stable nanostructures that are desirable for plastic electronic materials with prolonged lifetimes. Fulfillment of this potential requires the simultaneous optimisation of the spatial organisation and phase behaviour of heterogeneous thin films at the nanoscale. We demonstrate the controlled assembly of an all-conjugated diblock copolymer blended with fullerene. The crystallinity, nanophase separated morphology, and microscopic features are characterised for blends of poly(3-hexylthiophene-block-3-(2-ethylhexyl) thiophene) (P3HT-b-P3EHT) and phenyl-C61-butyric acid methyl ester (PCBM), with PCBM fractions varying from 0-65 wt%. We find that PCBM induces the P3HT block to crystallise, causing nanophase separation of the block copolymer. Resulting nanostructures range from ordered (lamellae) to disordered, depending on the amount of PCBM. We identify the key design parameters and propose a general mechanism for controlling thin film structure and crystallinity during the processing of semicrystalline block copolymers.

引用

页码：14711 / 14719

页数：9