Charge separation and recombination in self-organizing nanostructured donor-acceptor block copolymer films

被引：29

作者：

King, Simon ^{[1
]}

Sommer, Michael ^{[2
]}

Huettner, Sven ^{[2
]}

Thelakkat, Mukundan ^{[2
]}

Haque, Saif A. ^{[1
]}

机构：

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

[2] Univ Bayreuth, D-95440 Bayreuth, Germany

来源：

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

基金：

英国工程与自然科学研究理事会;

关键词：

POLYMER SOLAR-CELLS; PHOTOVOLTAIC CELLS; MORPHOLOGY; PERFORMANCE; EFFICIENCY; SEMICONDUCTOR; POLYTHIOPHENE; DIIMIDE; NETWORK;

D O I：

10.1039/b905708k

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：

A series of donor-acceptor diblock copolymers with varying molecular weight are studied in thin film and compared with an 'equivalent' blend formed from donor and acceptor homopolymers. Steady-state and transient spectroscopies are used to demonstrate a correlation between low molecular weight block copolymers and increased photoluminescence quenching (up to 99%) leading to higher yields of long-lived free charges. Such block copolymers are shown, by electron microscopy, to exhibit phase-segregated micrdomains whose size and periodicity are determined by their molecular weight. Photovoltaic devices made using these materials show a peak efficiency of 0.11% and correlate with our spectroscopic results, subject to a trade-off between charge generation and tranpsort/collection.

引用

页码：5436 / 5441

页数：6

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