Well-defined donor-acceptor rod-coil diblock copolymers based on P3HT containing C60: the morphology and role as a surfactant in bulk-heterojunction solar cells

被引：222

作者：

Yang, Changduk ^{[1
,2
,4
]}

Lee, Jae Kwan ^{[3
]}

Heeger, Alan J. ^{[3
]}

Wudl, Fred ^{[1
,2
,3
]}

机构：

[1] Univ Calif Santa Barbara, Mitsubishi Chem Ctr Adv Mat, Santa Barbara, CA 93106 USA

[2] Univ Calif Santa Barbara, Dept Chem & Biochem, Santa Barbara, CA 93106 USA

[3] Univ Calif Santa Barbara, Ctr Polymers & Organ Solids, Santa Barbara, CA 93106 USA

[4] Ulsan Natl Inst Sci & Technol, Sch Energy Engn, Ulsan 689805, South Korea

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2009年 / 19卷 / 30期

关键词：

FRAGMENTATION CHAIN TRANSFER; FREE-RADICAL POLYMERIZATION; BLOCK-COPOLYMERS; REGIOREGULAR POLY(3-HEXYLTHIOPHENE); POLYTHIOPHENE; EFFICIENCY; RAFT; PERFORMANCE; SOLUBILITY; POLYMERS;

D O I：

10.1039/b901732a

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：

The synthesis of well-defined rod-coil block copolymers consisting of P3HT donor and C-60 acceptor chromophores (P3HT-b-P(S(x)A(y))-C-60) in a molecular architecture is reported for use in bulk-heterojunction (BHJ) solar cells. In thin films of the resulting block copolymer, reproducible self-assembly into well-defined "nanofibrils'' is observed. This is the first example of a block copolymer containing a C-60 derivative that shows exclusively a nanofibrilar structure. We have investigated the potential utility of the block copolymer as a "surfactant'' for controlling the interface morphology of the P3HT: PCBM donor-acceptor phase domains within the composite. We find a substantial improvement in device performance when 5% of block copolymer are introduced to the P3HT: PCBM blend system, resulting in ca. 35% improved efficiency relative to the P3HT: PCBM solar cell fabricated without the "surfactant''.

引用

页码：5416 / 5423

页数：8

共 52 条

[11] Supramolecular self-assembly and opto-electronic properties of semiconducting block copolymers [J].